NHRA Rules and Correction Factors
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E.T. SUPER PRO, PRO, SPORTSMAN
7.50 (*4.50) seconds or slower
E.T. SUPER PRO: 7.50 to 11.99 (*4.50-7.49)
E.T. PRO: 12.00 to 13.99 (*7.50-8.59)
E.T. SPORTSMAN: 14.00 or slower (*8.60 and slower)
- REQUIREMENTS AND SPECIFICATIONS -
Only one internal-combustion reciprocating automotive-type, one motorcycle or one snowmobile engine permitted. Motorcycle or snowmobile powered vehicles without reverse may not burnout across starting line. Harmonic balancer meeting SFI spec 18.1 mandatory in any car running 10.99 (*6.99) or quicker. Maximum height of crankshaft centerline 36 inches (914 mm) on O.E.M. trucks; all others 24-inches (610 mm).
1.2 EXHAUST SYSTEM
Competition exhaust permitted. Exhaust must be directed out of car to rear, away from driver and fuel tank.
Gasoline, methanol, gasohol, diesel, natural gas and propane permitted. Nitromethane prohibited.
1.4 FUEL SYSTEM
All fuel tank filler necks located inside trunk must have filler neck vented to outside of body. Vented caps prohibited. All batteries, fuel lines, fuel pumps or filler necks located inside trunk require complete bulkhead of at least .024-inch (.6 mm) steel or .032 (.8 mm) aluminium to isolate driver compartment from trunk. Fuel lines must be located outside driver compartment. Fuel tanks must be within the confines of the body. See General Regulations 1.5.
1.5 LIQUID OVERFLOW
Catch-can mandatory for coolant overflow; one pint (.47 l) minimum capacity. See General Regulations 1.7.
1.6 NITROUS OXIDE
Commercially available nitrous oxide system prohibited on supercharged V-8 engine, permitted on all other engines. Nitrous bottles in driver compartment must be equipped with a relief valve and vented outside of driver's compartment. Bottles must be stamped with a DOT -1800 pound (124 bar) rating and permanently mounted (no hose clamps or tie wraps). Hoses from bottle(s) to solenoid must be high pressure steel braided or FIA permitted hoses. External heating of bottle(s) prohibited.
1.7 SUPERCHARGER, TURBOCHARGER
Permitted on gasoline and methanol-burning cars. Supercharger restraint system meeting SFI Spec 14.1 mandatory on Roots type supercharger when methanol is used as a fuel. See General Regulations 1.12, 1.13.
1.8 VALVE COVERS
Cast or fabricated metal valve covers, using all attachment bolt holes, mandatory on supercharged, methanol-burning cars.
DRIVE TRAIN: 2
2.1 CLUTCH, FLYWHEEL, FLYWHEEL SHIELD
Flywheel and clutch meeting minimum SFI Spec 1.1 or 1.2 (2-disc maximum) and flywheel shield meeting SFI Spec 6.1, 6.2 or 6.3 minimum mandatory in any car running 11.99 (*7.49) or quicker. Cars with rotary engines running 11.99 (*7.49) or quicker must be equipped with a flywheel shield made of 1/4-inch (6.35 mm) minimum thickness steel plate surrounding the bell housing 360 degrees. See General Regulations 2.3, 2.5, 2.6, 2.10.
OEM production line all-wheel-drive vehicles permitted. Drive shaft loop required on all cars running 13.99 (*8.59) or quicker (except vehicles running 13.00 (*8.14) or slower cars equipped with street tires.) See General Regulations 2.4.
After market axles and axle-retention device mandatory on any car running 10.99 (*6.99) or quicker and any car with locked differential. Cars running 10.99 (*6.99) or quicker that weigh more than 2,000 pounds (907 kg) with independent rear suspension must have swing axle differential replaced with conventional differential housing assembly.
2.4 TRANSMISSION, Automatic
Spring-loaded, positive reverse lockout device and functional neutral safety switch mandatory. Transmission shield meeting SFI Spec 4.1 mandatory on any car running 10.99 (*6.99) or quicker or any car exceeding 135 mph (217.2 km/h). Automatic transmission flex plate meeting SFI Spec 29.1 and flex plate shield meeting SFI Spec 30.1 mandatory on cars running 9.99 (*6.39) or quicker or any car exceeding 135 mph (217.2 km/h). See General Regulations 2.14.
2.5 TRANSMISSION, After market Planetary
Transmission shield meeting SFI Spec 4.1 mandatory on any supercharged vehicle. See General Regulations 2.13.
BRAKES & SUSPENSION: 3
Four-wheel hydraulic brakes mandatory on any bodied car running 7.99 (*4.99) or quicker. Minimum two rear-wheel (one calliper per wheel) hydraulic brakes mandatory on Dragsters, Funny Cars, and any car running slower than 8.00 (*5.00) seconds. Dragsters running slower than 10.99 (*6.99) with a total car weight of 1,000 pounds (454 kg) or less and a one piece rear axle may use a single brake rotor with dual callipers. See General Regulations 3.1.
See General Regulations 3.2, 3.3, 4.1.
3.3 SUSPENSION, Altereds, Dragsters
Full automotive-type front suspension mandatory. Rigid mounted rear axles permitted. Minimum one hydraulic shock absorber per sprung wheel. Suspension optional on cars weighing 2,350 pounds (1066 kg) or less with 120-inch (3.05 m) or more wheelbase. See General Regulations 3.2, 3.4, 3.5.
3.4 SUSPENSION, Stock-bodied cars
Full automotive-type suspension mandatory. Minimum one operating hydraulic shock absorber per wheel. Lightening of stock components prohibited. Rigid mounted suspensions prohibited. See General Regulations 3.2, 3.4, 3.5.
3.5 WHEELIE BARS
Permitted. Wheels must be non-metallic.
Permitted. See General Regulations 4.2.
4.2 DEFLECTOR PLATE
Mandatory on rear-engine Dragsters. See General Regulations 4.3.
4.3 GROUND CLEARANCE
Minimum 3-inches (7.6 cm) from front of car to 12-inches (30.5 cm) behind centreline of front axle, 2-inches (5.1 cm) for remainder of car, except oil pan and headers.
Mandatory on any car with top speed in excess of 150 mph (241.4 km/h). See General Regulations 4.8.
4.5 ROLL BAR
Roll bar mandatory in all cars running 11.00 (*7.00) to 11.99 (*7.49) and in convertibles running 11.00 (*7.00) to 13.99 (*8.59), and in dune-buggy type vehicles running 12.00 (*7.50) seconds and slower. Permitted in all cars. See General Regulations 4.10, 10.6.
4.6 ROLL CAGE
Roll cage mandatory in cars running 10.99 (*6.99) or quicker, or any car exceeding 135 mph (217.2 km/h). Full bodied cars, with unaltered firewall, floor and body (from firewall rearward, wheeltubs permitted), running between 10.00 (*6.40) and 10.99 (*6.99) roll bar permitted in place of roll cage. Cars running between 7.50 (*4.50) and 9.99 (*6.39) must have chassis inspected every three-years by the ASN and have a serialised sticker affixed to cage before participation. Must conform to specs for body style used, as listed in General Regulations 4.11, 10.6.
Minimum 90-inches (2.286 m), unless car has original engine. Maximum wheelbase variation from left to right: 1-inch (2.5 cm). Dragsters: 2-inches (5.1 cm). Minimum front tread width: 26-inches (66.0 cm) on any Dragster.
TIRES & WHEELS: 5
Racing slicks permitted. Minimum diameter of 13-inches on front tires of any Dragster.
Must be automotive-type wheels suitable for street use. Minimum wheel size: 13-inches (33.0 cm) (unless originally equipped with smaller wheels and vehicle is equipped with original engine). Wheel studs must be threaded into hex portion of lug nut a distance at least equal to the diameter of the stud. Automotive-type wire wheels or motorcycle wheels permitted on front axle only of Dragsters weighing 1,800 pounds (816.5 kg) or less. See General Regulations 5.2.
Properly braced, framed and supported seats constructed of aluminum, composite material, double layer poly or fibreglass (automotive accessory seats) permitted. See General Regulations 6.2.
6.2 SHEET METAL
Driver compartment interior must be aluminum, steel or fibreglass. Magnesium prohibited.
6.4 WINDOW NET
Mandatory in any full bodied car required by the rules to have a roll cage. See General Regulations 6.3, 10.3.
7.1 AIRFOIL, Altereds, Dragsters
A positive-locking device mandatory on all airfoils. Side-mount canard-type wings permitted. No part of wing may be within 6-inches (15.2 cm) of a tire. Front overhang not to project more than 30-inches (76.2 cm) forward of front spindle.
7.2 Airfoil, Bodied vehicles:
Non-OEM airfoils permitted; must be permanently attached to frame or rollcage, and non-adjustable during run
7.3 BODY, Altered-body vehicles
May be chopped, channeled, sectioned, streamlined, etc. Sedan delivery, 1-ton max. trucks or sedan pickups (Ranchero, El Camino) permitted. Fiberglass bodies permitted. Door hinges on any lift-off door must have safety pins or locks.
7.4 BODY, Dragsters
Body and cowl must be constructed of metal or composite material and extend forward to firewall. Driver compartment must be designed to prevent driver's body or limbs from making contact with wheels, tires, exhaust system or track surface should an incident occur. Sub-flooring independent of car body, is mandatory in Dragsters which allow driver's legs to rest on bellypan or chassis. On front-engine cars, intake scoop may not extend more than 11-inches (27.9 cm) above height of carburetor top. Front wheel fairings prohibited.
7.5 BODY, Stock-bodied vehicles
Must have full top and windshield. All full-bodied cars must have two driver exits. Four stock production fenders mandatory, fiberglass duplicates permitted. Fenders may be trimmed for tire clearance, altered fenders must have edges re-rolled or beaded.
Mandatory. See General Regulations 6.1, 7.5.
Mandatory. See General Regulations 6.1, 7.6.
Optional. Carburetors must be covered by flash shield or scoop. Hood scoop may not extend more than 11-inches (27.9 cm) above height of hood surface. See General Regulations 1.4.
7.9 WINDSHIELD, WINDOWS, Altereds, Dragsters
Optional. Windscreen mandatory. See General Regulations 7.8.
7.10 WINDSHIELD, WINDOWS, Stock-bodied vehicles
Mandatory, must be in good condition and free from cracks. May be replaced with shatterproof material, 1/8-inch (3.2 mm) minimum thickness. Windshield may not be cut for scoops, carb, etc. Windshield/window tint must meet the applicable government requirements. Windows must be closed during races, need not be operable. Decals permitted on rear quarter and rear window only.
Batteries must be securely mounted, may not be located in driver compartment. See General Regulations 8.1.
Timed ignition interruption devices (stutter boxes) prohibited. Starting line and/or "high side" rev limiters permitted. Two-steps, Rev limiters or any other rpm limiting devices, legal unto themselves but altered or installed so as to function as a down-track rpm controller, prohibited.
8.3 MASTER CUTOFF
Mandatory on any car with a battery running 9.99 (*6.39) or quicker, or any car exceeding 135 mph (217.2 km/h) or on any car where the battery is relocated into the trunk area. See General Regulations 8.4.
8.4 TAIL LIGHTS
Must have one functional tail light for night operations. Flashing, blinking or strobe lights prohibited. See General Regulations 8.6.
SUPPORT GROUP: 9
Prohibited. See General Regulations 9.1.
9.2 FIRE EXTINGUISHER SYSTEM
Permitted, must be securely mounted.
9.3 DATA RECORDER
Prohibited. See General Regulations 9.2.
9.4 PUSH BAR
Push bar must be designed to prevent push car from riding up on rear wheel of open-wheeled race cars.
9.5 TOW VEHICLES
Permitted in Super Pro only. See General Regulations 9.9.
See General Regulations 9.4, 9.11.
(ALSO REFER TO FIA INTERNATIONAL SPORTING CODE, APPENDIX L)
10.1 ARM RESTRAINTS
Mandatory in open-bodied cars running 11.99 (*7.49) or quicker. See General Regulations 6.3, 10.3.
Valid FIA Competition License mandatory. See General Regulations 10.4. Valid street driver's license mandatory for cars running 10.00 (*6.40) or slower.
10.3 DRIVER RESTRAINT SYSTEM
Seat belt mandatory in all cars. Three-inch (7.6 cm) driver restraint system meeting SFI Spec 16.1, mandatory in any car running 11.99 (*7.49) or quicker and in convertibles running 13.99 (*8.59) or quicker, and Dune buggy type vehicles running 12.00 (*7.50) seconds or slower. SFI 16.1 restraint system, when required, includes crotch strap, and must be updated at two-year intervals from date of manufacture. See General Regulations 10.5, 10.11.
10.4 HEAD PROTECTOR
Mandatory on any car with a roll bar or cage. See General Regulations 10.6.
Drivers in all 13.99 (*8.59) or quicker cars, and Dune buggy type vehicles running 14.00 (*8.60) seconds or slower must wear a helmet meeting SNELL 85, 90 or SFI 31.1, 31.2, 41.1 or 41.2 Specs or BSI BS 6658-85 type A (including all amendments) Specs. Driver's in supercharged front-engine open-bodied cars must wear a helmet meeting SNELL SA95, SA90 or SFI 31.1 or 31.2 Specs or BSI BS 6658-85 type A (including all amendments) Specs. See General Regulations 10.7.
10.6 NECK COLLAR
Mandatory in all cars running 9.99 (*6.39) or quicker, or cars exceeding 135 mph (217.2 km/h). See General Regulations 10.8.
10.7 PROTECTIVE CLOTHING
Shorts, bare legs, tank tops, or bare torsos prohibited when driving in competition.
- 10.00(*6.40) to 11.99 (*7.49) (unblown): All drivers, jacket meeting SFI spec 3.2A/1 mandatory.
- 9.99 (*6.39) to 7.50 (*4.50) or any vehicle exceeding 135 mph (217 km/h): Jacket and pants meeting SFI spec 3.2A/5 mandatory.
- All Open Body Vehicles: Gloves meeting SFI spec 3.3/1 and arm restraints mandatory.
- Dune-buggy or Dune-buggy type vehicles, 12.00 (*7.50) or slower: Jacket meeting SFI spec 3.2A/1, gloves meeting SFI spec 3.3/1 and arm restraints mandatory.
- Front engine, supercharged, open bodied car, OR any car with an automatic transmission in driver compartment (no floor covering transmission): Jacket and pants or suit meeting SFI spec 3.2A/15, gloves meeting SFI spec 3.3/5 and boot or shoes meeting SFI spec 3.3/5 mandatory.
Each car, regardless of class or category, must complete and satisfactorily pass inspection of a qualified scrutineer before being permitted to make a trial run or participate in any event conducted at an FIA licensed facility. (This includes private test sessions.)
Throughout this Appendix, a number of references are made for particular products to meet certain specifications (i.e.: FIA, SFI, SNELL, DOT, etc.). It is important to realize that these products are manufactured to meet certain specifications, and upon completion, that manufacturer labels his product as meeting that spec. Therefore, except as outlined under SFI or FIA requirements, any change to the product voids that certification; under no circumstances may any certified product be modified, altered or in any way vary from the as-manufactured condition; such a practice is in violation of the FIA, SFI, SNELL, DOT, etc., program and in so doing voids such certification and will not be accepted by FIA.
1.1 COOLING SYSTEM
All cooling systems/radiators must be installed in the stock location for body style used. Front engine Dragsters must have system installed in front of engine. Rear engine dragsters with radiator mounted in front of engine must install a deflector from frame rail to frame rail and to the top of the roll cage. Portion above top rail may be width of rear roll cage bars. See 4.3 DEFLECTOR PLATE
Classes limited to automotive engines only unless otherwise stated under Class Requirements. Contestants in weight-to-cubic-inch (weight to cubic centimeter) classes must claim cubic inch (cubic centimeter) displacement of engine used; under no circumstances may claimed displacement exceed actual displacement by more than five cubic inches (81.9 cm3). No allowance for overbore; any part of a cubic inch (cubic centimeter) is rounded off to the next highest inch (i.e.: 301.2 = 302). If engine size is changed during a race, competitor must report to FIA scrutineer before a run is attempted. Crankshaft centerlines must not exceed 24-inches (61.0 cm) from ground in any class; except OEM trucks, max height 36-inches (91.5 cm) (inside). Engine must be mounted to frame by a minimum of two 3/8-inch (9.53 mm) diameter grade 5 (or Class 8.8) bolts.
Valve train must incorporate conventional automotive coil spring design; use of pneumatic-type valve trains are prohibited in all classes.
All classes, except ET cars slower than 10.99 seconds, harmonic balancer meeting SFI spec 18.1 mandatory. All cars with pressed-on front harmonic balancers must have such installed to prevent accidental loss (i.e.: drilled and bolted).
All cars must be equipped with exhaust collectors, headers or stacks installed to direct exhaust out of car body to rear of car, away from driver and fuel tank. Exhaust stacks must have a metal connecting strap to prevent loss of one or more stacks during competition. If mufflers are used, they must be securely attached to exhaust system and car body or frame. Flexible tubing or "flex pipe" prohibited in all categories..
Consistent with its endeavors to maintain drag racing's acceptance as a recognized sport and recreation, FIA is experimenting with exhaust muffling devices and may in time require use of such equipment in certain environmental control areas.
1.4 FLASH SHIELDS
Carburetor inlet must not be openly exposed. In place of hood, carburetors must be equipped with a flash shield or velocity stacks which cover the top, back and sides, preventing fuel from being siphoned into the airstream or blown into driver's face. Additionally, any car that is driven, not towed, through the pits, with open stack(s) not protected by hood or scoop, must have screening installed on open stack(s) to prevent items from entering stack.
1.5 FUEL SYSTEMS
Location: All fuel tanks, lines, pumps, valves etc., must be outside of the driver's compartment and within the confines of the frame and/or steel body. Cool cans, in full-bodied cars, must be mounted a minimum of 6-inches (15.2 cm) forward of firewall. Fuel blocks must be located at least 6-inches (15.2 cm) forward of the flywheel/bellhousing area.
Tanks: When permitted by class regulations, fuel tanks located outside body and/or frame must be enclosed in a steel tube frame constructed of minimum 1 1/4-inch O.D. x .065-inch (31.8 x 1.65 mm) chrome moly or .118-inch (3.0 mm) mild steel tubing. All fuel tanks must be isolated from the driver's compartment by a firewall completely sealed to prevent any fuel from entering the driver's compartment. All fuel tanks must have a pressure cap and be vented outside of body. A positive-locking screw-on fuel tank cap is mandatory on all open-bodied cars. Insulated fuel tanks prohibited. When used, fuel cells must have a metal box protecting the part of the cell which is outside of body lines or trunk floor, excluding hose connection area in rear. All non-metallic fuel cells must be grounded to chassis.
Lines: All non-OEM fuel lines (including gauge and/or data recorder lines) must be metallic, steel-braided or FIA accepted "woven pushlock". A maximum of 12-inches (30.5 cm) total (front to rear) of non-metallic or non-steel braided is permitted for connection purposes only; individual injector nozzle and motorcycle fuel lines are excluded. Fuel lines (except steel braided lines) in flywheel/bellhousing area must be enclosed in a 16-inch (40.6 cm) length of steel tubing, 1/8-inch (3.2 mm) minimum wall thickness, securely mounted as a protection against fuel line rupture. It is mandatory that fuel lines passing supercharger drive belts be steel braided or be enclosed in protective steel tubing. Fuel lines must not be routed in the driveshaft tunnel.
Pumps/valves: Cars with non-OEM type mechanical fuel pumps must have a quick-action fuel shut off valve within easy reach of driver and located in main fuel line between the fuel tank and the carburetor and/or injectors. Fuel recirculation systems not part of normal fuel/pump system prohibited.
Fuel/air: Any method of artificially cooling or heating fuel prohibited (i.e.: cool cans, ice, freon, wet rags, etc.), except as noted in Class Requirements. Cool cans, wet towels, etc. are permitted in ET Handicap classes. Wet towels, rags, ice, etc. must be removed before vehicle leaves staging area. Ambient temperature air only; cooling or otherwise changing the conditions of the intake air prohibited.
Alternative Fuels: Containers for alternative fuels must be permanently labeled by the manufacturer as suitable for CNG or Propane. Tank must be vented outside of body. Alternative fuel systems must incorporate pressure relief valve meeting standards listed in NFPA 52. Alternative fuel systems must incorporate a manual shut off valve according to standards listed in NFPA52 for CNG vehicular systems. All hoses/lines used for alternative fuels must be permanently and distinctively marked by the manufacturer as to manufacturer name or trademark, service identifier and design pressure. Plastic, cast iron, galvanized, copper or aluminum pipe or hoses prohibited.
Gasoline is defined for purposes of this Appendix as a mixture of hydrocarbons only. Non-hydrocarbons which do not increase the specific energy of the gasoline are permitted to the extent that they do not exceed 0.15 % by volume and are blended in the gasoline by the refiner or fuel manufacturer.
Gasoline is a good electrical insulator, or dielectric, and its relative effectiveness as an insulator is represented by its Dielectric Constant. The average D.C. for the hydrocarbons which comprise gasoline is 2.025. This is defined as a reading of "0" with the FIA Fuel Check meter.
Gasoline is tested and certified at FIA events through the application of various chemical analyses as considered appropriate by Fuel Check personnel. Gasoline in a vehicle may be checked before use in competition.
1.7 LIQUID OVERFLOW
All cars in competition with any type of water overflow capable of spilling water must have a catch-can to accumulate the excess liquids and not leak onto the track. Minimum catch-can capacity: 1 pint (.47 l). Catch-can must be securely fastened; i.e. bolted, clamped. Overflow may be routed into headers on cars that are supercharged or burn nitromethane or methanol.
Methanol is a clear, colorless liquid with a mild odor at ambient temperatures. Methanol is sold in two U.S. Federal Grades: A and AA. Either grade is acceptable for use in FIA competition, and racers should ensure that the methanol they purchase meets Federal standards of purity. The purity standards for each grade are shown in the table below.
SPECIFICATIONS FOR PURE METHANOL
Methanol is tested and certified at FIA events through the application of various chemical analyses as considered appropriate by Fuel Check personnel. To be considered legal, methanol used in FIA competition must meet the U.S. Federal standards of purity. Any deviation from these standards because of impurities (beyond the limits established in the U.S. Federal specification) in the fuel sample will result in disqualification. Since methanol is a hygroscopic substance, it readily absorbs moisture from the air which rapidly renders methanol illegal as a fuel for use in FIA competition. Racers are cautioned to keep methanol containers tightly capped at all times to minimize the absorption of water. Racers are encouraged to have Fuel Check personnel check samples of their methanol any time there may be doubt as to its purity.
1.9 NITROUS OXIDE
Nitrous oxide permitted in ET classes only. The use of any agents other than nitrous oxide as part of, or mixed with, this pressurized fuel system is strictly prohibited. All bottles must be securely mounted, stamped with minimum 1800 pound (124 bar) DOT rating, and identified as N20. Nitrous oxide bottle(s) located in driver compartment must be equipped with a relief valve and vented outside of compartment. System must be commercially available and installed per manufacturers recommendations. All vehicles using a bottle of nitrous oxide must bear a mark in accordance with drawing n° 23. The mark will be clearly visible and will be located in a place which is not likely to be damaged in the event of an accident and which is near to the competition number. External heating of bottle(s) prohibited.
1.10 OIL SYSTEM
Accu-sump, dry-sump tanks, oil filters, oil supply lines, etc., prohibited in driver compartment and outside of frame and/or steel body / fenders. Oil pressure gauge and line permitted in driver compartment. Metal or steel braided line mandatory, maximum 3/16-inch (4.76 mm) inside diameter. Power enhancing additives prohibited.
1.11 PROPYLENE OXIDE
The use of propylene oxide is prohibited in all categories.
ROOTS-TYPE: Maximum size permitted 14-71; 19-inch (48.3 cm) maximum rotor case length; 11 1/4-inch (28.6 cm) maximum case width; 1/4-inch (6.35 mm) minimum case thickness; 1/4-inch (6.35 mm) minimum front plate thickness; .300-inch (7.6 mm) minimum rear plate thickness. Maximum rotor cavity diameter is 5.840 inches (14.834 cm). Rotor helix angle may not exceed that of a standard 71-series GM-type rotor 4 degrees per inch (1.5748°/cm). Maximum overdrive may not exceed 70 percent. Aluminium studs (supercharger to manifold) mandatory. See Class Requirements for manifold burst panel and restraint specifications.
ROOTS-TYPE HIGH HELIX: Must adhere to same maximum case dimensions and maximum rotor cavity diameter as standard Roots. Rotor helix angle may not exceed 6.5- degrees per inch (2.559°/cm), and 123.5 degrees total over 19-inch (48.3 cm) maximum rotor length. Use of High-Helix supercharger is restricted to TAD and TAFC only. Maximum overdrive may not exceed 70 percent. Aluminium studs (supercharger to manifold) mandatory. See Class Requirements for manifold burst panel and restraint specifications.
SCREW-TYPE: Must meet SFI Spec 34.1. Maximum case length 16-inches (40.6 cm); maximum case width 16-inches (40.6 cm); minimum case and front plate thickness 1/4-inch (6.35 mm); minimum rear plate thickness .300-inch (7.6 mm). Use of Screw-type supercharger is restricted to TAD and TAFC only. Under no circumstances may a screw supercharger overdrive exceed the manufacturers/SFI testing maximums. Manifold burst panel meeting SFI Spec 23.1 (in addition to supercharger panel) and restraint device meeting SFI Spec 14.21 mandatory. Aluminium studs (supercharger to manifold) mandatory.
Overdrive limits, as determined appropriate by FIA, are subject to adjustment at any time as dictated by performance.
ALL SUPERCHARGERS: Fuel and/or oil lines must be shielded wherever they pass the supercharger drive belt. Either a belt guard, or a fuel/oil line guard, may be utilized.
Variable multi-speed supercharger devices prohibited regardless of supercharger type.
1.13 SUPERCHARGER RESTRAINT DEVICE
Supercharger restraint system meeting SFI Specs mandatory per Class Requirements;. TF and FC require SFI 14.3; TAD and TAFC Roots-type require an SFI 14.2 restraint; TAD and TAFC Screw-type require SFI 14.21; methanol burning ET cars require SFI 14.1. Restraint system must be updated at two-year intervals from date of manufacture. See Class Requirements.
Regardless of class, each car must have a foot throttle incorporating a positive-acting return spring attached directly to the carburetor/injector throttle arm. A positive stop or override prevention must be used to keep linkage from passing over center, sticking in an open position. In addition to return springs, some means of manually returning the throttle to a closed position by use of the foot must be installed on all altered linkage systems except hydraulically or cable-operated systems. Per Class Requirements - Throttle control must be manually operated by driver's foot, electronics, pneumatics, hydraulics or any other device may in no way affect the throttle operation. Commercially available cable throttle systems are permitted. FIA accepted hand controls for the physically challenged permitted. Choke cables and brazed or welded fittings on steel cable are prohibited. No part of throttle linkage may extend below frame rails.
1.15 VENT TUBES, BREATHERS
Mandatory as outlined in Class Requirements, permitted on all cars. Where used, the tubes must terminate into an acceptable, permanently attached catch-tank with a minimum capacity of one gallon (3.79 l) per engine (except as noted in Class Requirements). The catch-tank must be baffled to keep overflow off track. Breather/vent tubes must be mechanically secured (tie-wraps prohibited) to the fittings and the fittings locked at both ends.
DRIVE TRAIN: 2
2.1 ANTI-BLOWBACK DEVICE
If mandated by Class Requirements a brace or device must be installed that will prevent the bellhousing or adapter shield from being blown rearward in the event of flywheel and/or clutch explosion. Material required is 4130 chrome moly (or Reynolds 531), minimum size is .875-inch (22.2 mm) O.D. x .083-inch (2.1 mm) wall tubing with 3/8-inch (9.53 mm) fasteners. Ball-lock pins prohibited.
2.2 AXLE-RETENTION DEVICES
All cars, except some ET cars as noted in Class Requirements, must be equipped with a satisfactory means of rear-axle retention; minimum .120-inch (3 mm) aluminum retainer, or .090-inch (2.3 mm) steel bearing retainer is mandatory. Stock 'C' clip axle retention prohibited as outlined in Class Requirements.
Each car in competition, except those with automatic transmissions, must be equipped with a foot-operated clutch incorporating a positive stop to prevent clutch from going over center or past neutral as in the case of centrifugal units. All pedals must be covered with non-skid material. FIA accepted hand controls for the physically challenged permitted. All slider clutches must meet SFI Spec 1.2, 1.3 or 1.4 as outlined under Class Requirements.
On any car in which the driver sits over or in back of the rearend center section, a suitable protective shield of .120-inch (3 mm) minimum thickness steel plate must be installed for those units with universal joints securely mounted to the rearend center section and the bellhousing adapter. Where possible, couplers are recommended in place of U-joints. For straight couplers, the minimum requirement is .063-inch (1.6 mm) aluminium which must contain an inspection cover for removal and inspection of the coupler, securely mounted to the rearend center section and the bellhousing adapter, or as noted in Class Requirements. In place of a crossmember, in the vicinity of the front universal joint, all cars in competition using open driveshafts, must have a retainer loop 360-degrees of enclosure, 1/4-inch (6.35 mm) minimum thickness and 2-inches (5.1 cm) wide, or 7/8-inch (22.2 mm) x .065-inch (1.65 mm) welded steel tubing, securely mounted and located within 6-inches (15.2 cm) of the front universal joint for support of the driveshaft in event of U-joint failure. Recommended the loop be round rather than oblong to minimize loading on loop. Open drivelines passing any part of the driver's body must be completely enclosed in 1/8-inch (3.2 mm) minimum thickness steel plate, securely mounted to the frame or frame structure.
The use of stock-type cast iron flywheels and/or pressure plates prohibited. The use of aluminium flywheels in Top Fuel and Funny Car is prohibited. Units meeting SFI Spec 1.1, 1.2, 1.3 or 1.4 are mandatory except as noted in the Class Requirements.
2.6 FLYWHEEL SHIELD & MOTOR PLATE: General
Absolutely no modifications to as-manufactured design are permitted on SFI Spec 6.1, 6.2 and/or 6.3 flywheel shields and/or liners. Titanium bellhousings must be re-inspected and re-certified yearly. SFI 6.2 and 6.3 steel bellhousings must be re-inspected and re-certified every two years. SFI 6.1 steel bellhousings must be re-inspected and re-certified every five years.
The flywheel shield must be fastened to the engine and motor plate with a full complement (all available engine bolt holes or as specified by the manufacturer) of grade 8 (or Class 12.9) bolts or high-strength studs. The use of Allen bolts to fasten the shield to engine or motor plate, to fasten covers, etc., is prohibited. All bolts (not studs or nuts) used for flywheel shield mounting, covers, etc., must be identifiable as to grade; all nuts and bolts associated with flywheel shield mounting, covers, etc., must be full standard depth, width, etc. (reduced thickness bolt heads, hollow bolts, half nuts, thin wall nuts, etc., prohibited). Maximum depth of flywheel shield is 8 5/8-inches (21.9 cm), except TF and FC, maximum depth 9.4-inches (239mm) (inside). Maximum thickness of all motor plates, mid-plates, mounting plates installed between engine and flywheel shield is 1/2-inch (12.7 mm). All covers and fasteners associated with the flywheel shield must be installed prior to starting engine at anytime, including warm-ups. Maximum spacing between flange fasteners in the flywheel shield is 7-inches (17.8 cm). Chemical milling or any other structure weakening procedures are prohibited. Welding to repair a flywheel shield is prohibited unless it is performed by the manufacturer and recertified by the manufacturer prior to use.
Cooling holes in the motor plate are limited to a maximum of two 2-inch (5.1 cm) diameter holes (to be outside of the oil pan area). SFI 6.2 flywheel shields may have one 2-inch (5.1 cm) maximum diameter hole in the bottom of the back face of the shield. The opening in the motor plate for the crankshaft flange may not exceed the crankshaft flange diameter by more than 1-inch (2.5 cm).
2.7 FLYWHEEL SHIELD: Top Fuel & Funny Car
TF and FC cars equipped with a clutch must have a flywheel shield (bellhousing) that meets SFI Spec 6.2 and is labeled accordingly. A one-piece motor plate constructed of 1/4-inch (6.35 mm) minimum thickness 4130 chrome-moly (or Reynolds 531) steel and fitting between the engine and flywheel shield according to the requirements of SFI Spec 2.3H, 10.1C or 2.2A is required. The motor plate must be attached to the chassis at the four corners with at least two welded mounting points utilizing minimum 3/8-inch (9.53 mm) diameter grade 5 (or Class 8.8) bolts and full nuts. The remaining two motor plate mounting points must be at least saddles fitting around the frame rails and secured with aircraft-type clamps or bolts (hose clamps prohibited).
The flywheel shield and motor plate are to be fastened to the engine by at least seven high strength steel (or titanium) 7/16-inch (11.1 mm) diameter shouldered studs countersunk 3/4-inch (19.1 mm) outside diameter into the engine side of the motor plate and threaded into the engine 3/4-inch (19.1 mm) minimum and nuts (of a similar material) above the centerline of the crankshaft. The motor plate must be fastened to the flywheel shield with at least eight 7/16-inch (11.1 mm) diameter grade 8 (or Class 12.9) bolts or high strength steel alloy (or titanium) studs and nuts below the centerline of the crankshaft. The flywheel shield must also be fastened to the motor plate by four 3/4-inch (19.1 mm) diameter grade 8 (or Class 12.9) shoulder bolts or high strength steel (or titanium) fasteners and nuts; one in each quadrant as required by SFI Spec 2.3H or 10.1C.
A minimum .090-inch (2.3 mm) 4130 chrome moly (or Reynolds 531) steel or titanium liner (or as required by the manufacturer) must be fitted to the flywheel shield that is the width of the round body surface of the shield. It must be welded together so that it will fit into the body of the flywheel shield and rotate in order to absorb energy. A 1/4-inch (6.35 mm) bolt may be threaded into the body of the flywheel shield to secure the liner(s) from movement during normal use.
At least five fasteners, 3/8-inch (9.53 mm) diameter minimum, must be used to secure aftermarket planetary transmissions (and/or reversers) to flywheel shield. 1/2-inch (12.7 mm) thick rings, bosses, or nuts must be welded, or otherwise secured inside the back face of the flywheel shield through which the fasteners must be secured.
As described in Section 2.6, any modifications or alterations to the bellhousing by anyone other than the original manufacturer, are prohibited. Bellhousing must be recertified by the original manufacturer or his agent following modification. Clutch adjustment slots, maintenance holes and covers, etc. must be installed by the original manufacturer.
2.8 FLYWHEEL SHIELD: Top Alcohol Dragster & Top Alcohol Funny Car
TAD and TAFC cars equipped with a clutch must have a flywheel shield (bellhousing) that meets SFI Spec 6.2 and is labeled accordingly. All requirements for TAD and TAFC bellhousing installations are the same as TF & FC with the following exceptions:
A one-piece motor plate constructed of 1/4-inch (6.35 mm) minimum thickness 2024T3 (or A-U4G1, AlCuMg2, L.97, L.98), 6061T6 (or H20) or 7075T66 (or A-Z5GU, AlZnMgCu1.5, L.95, L.96) aluminum (or steel) and fitting between the engine and flywheel shield according to the requirements of SFI Spec 2.2A, 2.3H or 10.1C is required. The motor plate must be attached to the chassis with at least two welded mounting points utilizing minimum 3/8-inch (9.53 mm) diameter grade 5 (or Class 8.8) bolts and nuts. All other motor plate mounting points must be at least saddles fitting around the frame rails and secured with aircraft-type clamps or bolts (hose clamps prohibited).
The flywheel shield and motor plate are to be fastened to the engine by at least seven 3/8-inch (9.53 mm) diameter grade 8 (or Class 12.9) bolts or high strength steel (or titanium) studs threaded into the engine, 3/4-inch (19.1 mm) minimum, and nuts of a similar material, above the centerline of the crankshaft. The motor plate must be fastened to the flywheel shield with at least eight 3/8-inch (9.53 mm) diameter grade 8 (or Class 12.9) bolts or high strength steel alloy (or titanium) studs and nuts below the centerline of the crankshaft. The flywheel shield must also be fastened to the motor plate by four 3/4-inch (19.1 mm) diameter grade 8 shoulder bolts or high strength steel (or titanium) fasteners and nuts; one in each quadrant s required by SFI Spec 2.3H or 10.1C.
As described in Section 2.6, any modifications or alterations to the bellhousing by anyone other than the original manufacturer, are prohibited. Bellhousing must be recertified by the original manufacturer or his agent following modification. Clutch adjustment slots, maintenance holes and covers, etc. must be installed by the original manufacturer.
2.9 FLYWHEEL SHIELD: Pro Stock
Pro Stock cars, equipped with a single or dual disc clutch, must have a flywheel shield that meets SFI Spec 6.1, 6.2 or 6.3 and is labeled accordingly. Pro stock cars equipped with a multiple (more than 2) disc clutch, must have a flywheel shield that meets SFI spec 6.2, and is labeled accordingly.
As described in Section 2.6, any modifications or alterations to the bellhousing by anyone other than the original manufacturer are prohibited. Bellhousing must be recertified by the original manufacturer or his agent following modification. Clutch adjustment slots, maintenance holes and covers, etc. must be installed by the original manufacturer.
A motor plate of 1/8-inch (3.2 mm) minimum thickness steel, titanium, or 2024T3 (or A-U4G1, AlCuMg2, L.97, L.98), 6061T6 (or H20) or 7075T6 (or A-Z5GU, AlZnMgCu1.5, L.95, L.96) aluminium is required. The flywheel shield must be fastened to the engine and motor plate with a full complement (all available engine bolt holes or as specified by the manufacturer) of minimum 3/8-inch (9.53 mm) diameter grade 8 (or Class 12.9) bolts or high strength steel studs above the centerline of the crankshaft. The motor plate must be fastened to the flywheel shield with at least eight 3/8-inch (9.53 mm) diameter grade 8 (or Class 12.9) bolts or high strength steel alloy (or titanium) studs and nuts below the centerline of the crankshaft. An opening in the motor plate for an alternative starter location is permitted but it may not exceed 2-inches (5.1 cm) in diameter and when such an opening is present only one cooling hole is permitted in the motor plate.
2.10 FLYWHEEL SHIELD: Other Classes
Other class cars, except as noted in the ET Handicap Section, using a clutch, must be equipped with an SFI Spec 6.1 (single-disk clutch) or 6.2 (multi-disk clutch) flywheel shield (bellhousing) labeled accordingly, complete with motor plate and full complement of bolts (all available engine bolt holes or as specified by manufacturer) of minimum 3/8-inch (9.53 mm) diameter grade 8 (or Class 12.9) bolts or high strength steel alloy studs above centerline of crankshaft. The motor plate must be fastened to the flywheel shield with at least eight 3/8-inch (9.53 mm) diameter grade 8 (or Class 12.9) bolts or high strength steel alloy studs and nuts below the centerline of the crankshaft. Modifications or repairs to the flywheel shield prohibited except if performed and recertified by manufacturer.
Exceptions to this rule: Certain engines are not required to have a shield when they are normally aspirated and gasoline burning, and certain engines must use a steel billet flywheel in lieu of a flywheel shield. Some engines for which an SFI 6.1 or 6.2 Spec adapter shield is not commercially available, must be equipped with a flywheel shield made of 1/4-inch (6.35 mm) minimum thickness steel plate, securely mounted to the frame or frame structure and completely surrounding the bellhousing 360 degrees. The flywheel shield shall not be bolted to either the bellhousing or engine. The flywheel shield must extend forward to a point at least 1-inch (2.5 cm) ahead of the flywheel and 1-inch (2.5 cm) to the rear of the rotating components of the clutch and pressure plate. Other engines, where an SFI 6.1 or 6.2 flywheel shield is not available, may use an SFI 6.1 or 6.2 flywheel shield from another application and mount it to a motor plate which is mounted to the engine block at all available bolt holes. The FIA Drag Racing Commission will establish a list of such exceptions, to be published annually in the FIA Bulletin.
Titanium flywheel shields are only permitted in Top Fuel, Funny Car, Pro Stock, Top Alcohol Dragster, and Top Alcohol Funny Car.
Welded spider gear rearends prohibited in all classes. Four-wheel-drive permitted in all ET cars running 12.00 seconds (*7.50) or slower. Aftermarket axles and axle-retention device mandatory on TF, FC, TAD, TAFC and 10.99 (*6.99) or quicker ET cars; also mandatory on any car (regardless of class or ET) with a spool.
All cars and trucks in competition except motorcycle or snowmobile powered dragsters, must be equipped with a reverse gear.
2.13 TRANSMISSION, AFTERMARKET PLANETARY
A transmission shield covering transmission and reverser that meets SFI Spec 4.1 is mandatory if engine burns nitromethane, methanol or is supercharged, or on any overdrive unit. Air shifter bottles must be stamped with DOT -1800 pound (124 bar) rating (minimum), and be securely mounted (no tie wraps or hose clamps).
At least three bolts, 3/8-inch (9.53 mm) minimum, must be used to secure aftermarket planetary transmissions to bellhousing, except as noted in Top Fuel, Funny Car, Top Alcohol Dragster and Top Alcohol Funny Car.
2.14 TRANSMISSION, AUTOMATIC
Any non-OEM floor-mounted automatic transmission shifter must be equipped with a spring loaded positive reverse lockout device to prevent the shifter from accidentally being put into reverse gear. Functional neutral safety switch mandatory. All transmission lines must be metallic or high-pressure-type hose. All vehicles running quicker than 9.99 seconds (*6.39) or faster than 135 mph (217.2 km/h) and using an automatic transmission must be equipped with a transmission shield meeting SFI Spec 4.1 and labeled accordingly. "Blanket" type shield, appropriately labeled as meeting SFI Spec 4.1 permitted. All non blanket type shields must incorporate two (or one, per manufacturer's instructions) 3/4-inch (19.1 mm) x 1/8-inch (3.2 mm) straps that bolt to the shield on each side, and pass under the transmission pan, or transmission pan must be labeled as meeting SFI Spec 4.1. Permitted in all classes where an automatic transmission is used. 9.99 (*6.39) or quicker ET cars, and 135 mph (217.2 km/h) or faster ET cars using an automatic transmission must be equipped with a flexplate meeting SFI Spec 29.1 and covered by a flexplate shield meeting SFI Spec 30.1. Air shifter bottles must be stamped with DOT -1800 pound (124 bar) rating (minimum) and be securely mounted (i.e. no tie-wraps or hose clamps.)
BRAKES & SUSPENSION: 3
Brakes on each car, regardless of class, must be in good working order with two-wheel hydraulic brakes on rear wheels as a minimum requirement. Four-wheel hydraulic brakes are recommended, or as specified under Class Requirements. Lightening of backing plates, brake drums and/or brake shoes by cutting or trimming metal prohibited. Cooling or lightening holes may not be drilled in cast iron disc brake rotors. Aluminium rotors prohibited (except FC and TAFC front rotors). If hand brake is used, brake handle must be inside car's body or driver compartment. Brake lines must be steel, steel braided or DOT (DIN/ISO) approved flexible and routed outside the frame rail, or enclosed in a 16-inch (40.6 cm) length of 1/8-inch (3.2 mm) minimum wall thickness steel tubing securely mounted where line(s) pass the flywheel bellhousing area and not routed in the driveline tunnel. All brake lines must be attached to chassis as per OEM-style; hoses must have mounting brackets; no tie wraps, tape, etc. All brake lines on any rear-engine car must be protected inside of tubing or be braided steel construction where they pass the engine. All pedals must be covered with non-skid material. Automated and/or secondary braking systems prohibited; application and release of brakes must be a direct function of the driver; electronics, pneumatics or any other device may in no way affect or assist brake operation. FIA accepted mechanical anti-lock braking systems (ABS) permitted in all classes (contact FIA Technical Department office). If brake system includes a differential pressure switch, line-lock installed on front brakes must have solenoid installed after the differential switch. All line-locks (electric or hydraulic) must be self returning to normal brake operating mode.
3.2 SHOCK ABSORBERS
Each car in competition must be equipped with one operative shock absorber for each sprung wheel. Shock absorbers may be either hydraulic or friction type, securely mounted and in good working order. (See Class Requirements.)
Each car's steering system must be secure and free of defects. All welded parts must have additional visible reinforcement. Only conventional automotive steering systems are permitted; flexible steering shafts prohibited. All rod ends must be a minimum of 3/8-inch (9.53 mm) shank diameter and must be installed with flat washers to prevent bearing pull out (see drawing 7). All steering boxes, sectors and shafts must be mounted to the frame or suitable crossmember and cannot be mounted in any case to the bellhousing and/or bellhousing adapter shield, motor plate or firewall. It is recommended that they be mounted to the rear of same. A secondary steering shaft stop must be installed to prevent long steering shaft from injuring driver in case of frontal impact (i.e.: collar or U-joint pinned at crossmember, bracket, etc.). Commercially available quick-disconnect steering wheels permitted (except as noted in Class Requirements); adapter must be welded to the shaft. All fasteners must be of a positive nature; no roll or pressed pins, no ball-lock pins, set screws, etc.
All cars must have a full suspension system of the type produced by an automobile manufacturer (i.e.: springs, torsion bars, etc.). Rigid-mount front and/or rear axles are permitted when so indicated in Class Requirements. All rod ends must be installed with flat washers to prevent bearing pullout. Hollow rod ends are prohibited. Three-wheel vehicles are not eligible for competition in any class. Radius rods are not required on front axles which are rigidly mounted 18-inches (45.7 cm) or less from king pin axis. Any front suspension using a beam or tubular axle must have radius rods attached to frame.
3.5 TRACTION BAR ROD ENDS
Minimum requirement for rod ends on the front of all ladder-type traction bars is 3/4-inch (19.1 mm) steel. A rod end strap to keep ladder bar secured in event of rod end failure mandatory in all classes. All traction devices that are not attached at front (i.e. slapper bars, etc.) must have a U-bolt or strap to prevent them from coming in contact with track.
3.6 WHEELIE BARS
Some classes limit length of wheelie bar - see Class Requirements. All wheelie bars, regardless of class, must have non-metallic wheels (i.e.: rubber, plastic). Using wheelie bar wheels as "fifth wheel" sensing device prohibited.
Each car in competition, regardless of class, must have sufficient positive front-end alignment to ensure proper handling of car at all speeds.
As permitted in Class Requirements. Any material used for the purpose of adding to a car's total weight must be permanently attached to the car's structure and must not extend behind or in front of the car's body or above the rear tires. No liquid or loose ballast permitted (i.e.: water, sandbags, rocks, shot bags, metal weights, etc.). Weight boxes (2 maximum) made of 1/8-inch (3.2 mm) material (see illustration - drawing 9) may be constructed to hold small items such as shot bags, lead bars, etc., as long as box and contents do not weigh more than 100 pounds (45.36 kg) or as outlined in Class Requirements. The box must be securely fastened to the car's frame or crossmember with at least two 1/2-inch (12.7 mm) diameter steel bolts. Any liquid other than engine fuel being used, located behind the front firewall, (on a front engine car) is considered ballast, and is prohibited. To permit "making a class" due to the difference in scale calibration, a maximum removable weight of 100 pounds (45.4 kg) (or as outlined in Class Requirement) is permitted. Removable weight must be securely mounted to the frame or frame structure by a minimum of two 1/2-inch (12.7 mm) diameter steel bolts per 100 pounds (45.4 kg) , or one 3/8-inch (9.53 mm) bolt per 5 pounds (2.3 kg). Hose clamps, wire, strapping, tape, tie wraps etc. for securing weight or ballast prohibited. See illustration for attachment method. Permitted forms of ballast are: 1) Heavier gauge steel floors such as 16 or 18-gauge (1.30 or 1.00 mm) (heavier gauge and/or plate steel prohibited); 2) Frame reinforcing crossmembers; or 3) The addition of protective equipment such as roll bars, flywheel shield, etc. If additional ballast is needed, and is permitted according to class requirements, it must be permanently attached to frame, bolted with two 1/2-inch (12.7 mm) diameter bolts per 100 pounds (45.4 kg), with nuts welded to bolts. Maximum amount of removable and/or permanent ballast, regardless of class, is 500 pounds (227 kg).
4.3 DEFLECTOR PLATE
All rear-engine cars must have a deflector plate to protect driver and fuel tank from engine. Plates must be made of minimum 1/8-inch (3.2 mm) aluminum or .060-inch (1.5 mm) steel or titanium. Must extend from top blower pulley to bottom pulley and be at least 1-inch (2.5 cm) wider than each pulley for supercharged cars. Other cars must have plate covering from shoulder height to bottom of chassis. On any enclosed engine / driver configuration a full bulkhead must be installed completely sealing the driver from the engine. Minimum attachment for any plate is four 5/16-inch (7.9 mm), Grade 5 (or Class 8.8) bolts. See 1.1 COOLING SYSTEM for additional requirements.
TF, FC, PS, TAD, TAFC, and 9.99 (*6.39) or quicker ET chassis (see Class Requirements) must have a serialized chassis sticker affixed to frame before participating in any FIA event. Chassis certifications are available through ASN. Grinding of welds prohibited. All butt welds must have visible reinforcement (i.e. sleeve and rosette welds). Pressurization of frame rails, roll bar or roll cage in lieu of air bottles is prohibited. Visible reinforcement around any hole in any SFI spec chassis (not just the roll cage) mandatory. Reinforcement must be of at least the same cross sectional area as the hole, at least .049 inch (1.2 mm) thick chrome molly and completely welded around the outside. See 4.10 ROLL BARS and 4.11 ROLL CAGES.
4.5 GROUND CLEARANCE
Minimum 3-inches (7.6 cm) from front of car to 12-inches (30.5 cm) behind centerline of front axle, 2-inches (5.1 cm) for remainder of car, except oil pan and exhaust headers where permitted. When permitted under Class Requirements, devices used for anti-rotation purposes (i.e.: wheelie bars) are exempt from the two-inch (5.1 cm) clearance rule.
4.6 NON-DESTRUCTIVE TEST CERTIFICATES
Non-destructive test inspection certificates may be required by the scrutineer on any altered or welded parts.
4.7 MOUNTING HARDWARE
Hose clamps and tie wraps may only be used to support hoses and wires; all other components must be welded, bolted, aircraft clamped etc. All Dzus fastener buttons must be metallic.
If outlined in Class Requirements, mandatory to have a braking parachute produced by a recognized drag racing parachute manufacturer. Scrutineers may observe the proper operation of the parachute and inspect for worn or frayed shroud lines, ripped or dirty canopies and worn or ragged pilot chutes. Parachute cable housings should be mounted solidly to frame tube or other suitable member no further back than 1-inch (2.5 cm). The release housing must be attached within 12-inches (30.5 cm) of the parachute pack and in a manner that will allow the inner cable to release the chute. When supercharged and/or using nitromethane as a fuel, it is mandatory that the parachute pack and unpacked shroud lines be protected with fire-resistant material from the mounting point into the pack. Parachutes must have their own independent mounting. The use of ball-lock pins for parachute mounting prohibited. See Class Requirements regarding use of two parachutes. Such applications require separate shroud-line mounting points for each parachute system.
4.9 PINION SUPPORT
All cars using an open driveline must have radius arms, traction bars or some suitable pinion support to prevent rearend housing rotation. It is recommended that a torque tube, steel, 1/8-inch (3.2 mm) minimum wall thickness, be used to enclose all drivelines.
4.10 ROLL BARS
All roll bars must be within 6-inches (15.2 cm) of the rear, or side, of the driver's head, extend in height at least 3-inches (7.6 cm) above the driver's helmet with driver in normal driving position, and be at least as wide as the driver's shoulders or within 1-inch (2.5 cm) of the driver's door. Roll bar must be adequately supported or cross-braced to prevent forward or lateral collapse of roll bar. Rear braces must be of the same diameter and wall thickness as the roll bar and intersect with the roll bar at a point not more than 5-inches (12.7 cm) from the top of the roll bar. Sidebar must be included on driver's side. The side bar must pass the driver at a point midway between the shoulder and elbow. All vehicles with OEM frame must have roll bar attached to frame; installation of frame connectors on unibody cars does not constitute a frame and therefore it is not necessary to have the roll bar attached to the frame. Unibody cars with stock floor and firewall (wheel tubs permitted) may attach roll bar with 6-inch (15.2 cm) x 6-inch (15.2 cm) x .125-inch (3.2 mm) steel plates on top and bottom of floor bolted together with at least four 3/8-inch (9.53 mm) bolts and nuts, or weld main hoop to rocker sill area with .125-inch (3.2 mm) reinforcing plates. All 4130 chrome moly welding must be done by approved TIG Heliarc process; mild steel (or ST51) welding must be approved MIG wire feed or approved TIG heliarc process. Welding must be free of slag and porosity. Any grinding of welds prohibited. See illustration (Drawing 12).
Roll bar must be padded anywhere driver's helmet may contact it while in driving position. Adequate padding must have minimum 1/4-inch (6.35 mm) compression or meet SFI Spec 45.1.
4.11 ROLL CAGE
All cage structures must be designed in an attempt to protect the driver from any angle, 360-degrees. All 4130 chrome-moly tube welding must be done by approved TIG heliarc process; mild steel tube welding must be approved MIG wire feed or TIG heliarc process. Welding must be free of slag and porosity. any grinding of welds prohibited. Additionally, roll cage must be padded any where the driver's helmet may contact it while in the driving position. TAD, TAFC, Pro Stock, Funny Car & Top Fuel padding must meet SFI Spec 45.1.
Open Bodied cars
When driver is in driving position in an open bodied car, roll cage must be at least 3-inches (76 mm) in front of helmet. Cars without crossmember above driver's legs must have a strap or device to prevent legs from protruding outside chassis. On front-engine dragster, seat uprights and back braces must be arranged such that a flat surface passed over any two adjacent members will not contact the driver seat or containment. Additional uprights, max 30-degrees from vertical, must be added until this criteria is satisfied. When non-vertical upright or "running W" side bay designs are used (diagonals installed at greater than 30-degrees from vertical), adjacent roll cage diagonals must be the same size as that required for the upright. Motor mount and/or rear end uprights (except rear engine dragster) may be rectangular tubing, 1 3/4-inch x 1-inch x .058-inch (44.5 x 25.4 x 1.5 mm) CM or MS minimum.
Full Bodied Cars
On full bodied car, with driver in driving position, helmet must be in front of main hoop. If helmet is behind or under main hoop, additional tubing same size and thickness as roll cage must be added to protect driver. Main hoop may be laid back or forward but driver must be encapsulated within the required roll cage components.
All cage structures must have in their construction cross bar for seat bracing and as the shoulder harness attachment point; cross bar must be installed no more than 4-inches (102 mm) below, and not above, the driver's shoulders or to side bar. All required rear braces must be installed at a minimum angle of 30-degrees from vertical, and must be welded in. Side bar must pass the driver at a point midway between the shoulder and elbow.
Unless an O.E.M. frame rail is located below and outside of driver's legs (i.e. '55 Chevy, '65 Corvette, etc.) a rocker or sill bar, minimum 1 5/8-inch (41.2 mm) x .083 (2.1 mm) CM or .118 (3.0 mm) MS or 2-inch x 2-inch x .058-inch (50.8 x 50.8 x 1.5 mm) CM or MS rectangular, is mandatory in any car with a modified floor or rocker box within the roll cage uprights (excluding six square feet of transmission maintenance opening). Rocker bar must be installed below and outside of driver's legs, and must tie into the main hoop, the forward hoop, frame, frame extension or side diagonal. Rocker bar may not tie into swing out side bar support. If rocker bar ties into side diagonal more than 5-inches (127 mm) (edge to edge) from forward roll cage support or main hoop, a 1 5/8-inch (41.2 mm) x .083 (2.1 mm) CM or .118 (3.0 mm) MS brace/gusset is mandatory between the diagonal and forward roll cage support or main hoop.
Swing out side bar permitted on O.E.M. full bodied car 7.50 (*4.50) E.T. and slower. The following requirements (a through d) will be enforced on cars certified after 1/1/98, on all cars 1/1/99.
a. 1 5/8-inch (41.2 mm) O.D. x .083-inch (2.1 mm) (CM) or .118-inch (3.0 mm) (MS) minimum. Bolts / pins must be 3/8-inch (9.5 mm) diameter steel, minimum and in double shear at both ends.
b. Male or female clevis(es) permitted. Male clevis must use two minimum 1/8-inch (3.2 mm) thick brackets (CM or MS) welded to each roll cage upright; female must use minimum 1/4-inch (5.4 mm) thick bracket (CM or MS) welded to each roll cage upright. Pins must be within 8-inches (204 mm) of the vertical portion of both the forward and main hoops. A half cup backing device must be welded to the vertical portion of the main hoop (inward side) or the upper end of the swing out bar (outward side), minimum .118-inch (3.0 mm) wall (CM or MS) extending at least 1 5/8-inch (41.2 mm) past the center of the pins. A clevis assembly utilizing a minimum .350-inch (8.90 mm) thick male component and two minimum .175-inch (4.45 mm) thick female components may use a 1/2-inch (12.7 mm) diameter grade 5 bolt, and does not require a half cup backing device.
c. Sliding sleeves of 1 3/8-inch (35 mm) x .083-inch (2.1 mm) CM or .118 (3.0 mm) MS, with minimum 2-inch (51 mm) engagement, are permitted in lieu of the upper pin/cup.
d. All bolt/pin holes in the swing out bar must have at least one hole diameter of material around the outside of the hole.
For all dragsters, funny cars and other cars requiring a funny car or dragster style roll cage, the upper roll cage members must be arranged such that a flat surface passed over any two adjacent members will not contact the driver's helmet while the helmet is held in contact with the inner side of the same roll cage members. If the roll cage members do not satisfy this criteria, head/helmet guards of 3/4 x .049-inch (19.1 x 1.24 mm) round tube or 3/4 (19.1 mm) by .090-inch (2.29 mm) flat strap must be added until the criteria is satisfied.
Effective 1/1/98 for chassis certification, 1/1/99 on all cars requiring a roll cage:
If the O.E.M. firewall has been modified (in excess of 1 square foot (929 cm2) for transmission removal, not including bolted in components) a lower windshield or dash bar of 1 1/4 x .058-inch (32 x 1.5 mm) 4130 chrome moly or 1 1/4 x .118-inch (32 x 3.0 mm) mild steel is mandatory connecting the forward cage supports.
Minimum 90-inches (2.286 m), unless car has original engine. Maximum wheelbase variation from left to right is 1-inch (2.5 cm), unless otherwise noted in Class Requirements.
TIRES & WHEELS: 5
Tires will be visually checked for condition, pressure, etc., and must be considered free of defects by the scrutineer prior to any run. All street tires must have a minimum of 1/16-inch (1.6 mm) tread depth.
Temporary spares, space saver spares, farm implement or trailer tires prohibited. Metal screw-in valve stems mandatory in tubeless tires, front and rear, on cars running 11.99 (*7.49) or quicker.
Hubcaps must be removed for scrutineers, who will check for loose lugs, cracked wheels, worn or oversize lug holes, and condition of spindles, axle nuts, cotter pins, etc. Snap-on hubcaps are prohibited on any class car. Each car in competition must be equipped with automotive type wheels with a minimum 12-inches (30.5 cm) of diameter unless Class Requirements stipulate otherwise. Motorcycle wheels or lightweight automotive wire wheels must be equipped with .100-inch (2.5 mm) minimum diameter steel spokes, properly cross-laced to provide maximum strength. All spoke holes in rim and hub must be laced. Omissions to lighten wheels prohibited. All wheel studs must project into the hex portion of the lug nut by a distance equal to one diameter of the stud. Steel lug nuts mandatory. Maximum rim width on any car: 16-inches. No rear wheel discs or covers permitted in any category.
6.1 DRIVER COMPARTMENT
All interior panels (firewalls, floors, wheel tubs, doors, etc.) within the driver compartment of enclosed-cockpit cars where the driver is located behind the engine must be constructed of materials other than magnesium. Driver compartment of any enclosed or full bodied car must be totally sealed from engine and transmission. All holes in firewall must be sealed with aluminium or steel. Openings around all linkages, lines, wires, hoses, etc. must be minimized.
6.2 UPHOLSTERY, SEATS
The driver's seat of any car in competition must be constructed, braced, mounted, and upholstered so that it will give full back and shoulder support. The driver's seat must be supported on the bottom and back by the frame or crossmember. Except as noted in SFI specifications, seats must be bolted with four bolts (and nuts and washers) on the bottom and one bolt in the rear into crossbar; all bolts must go into frame or crossbraces, ball-pins for seat attachment prohibited. All seats must be upholstered, or as noted under Class or SFI Requirements. Properly braced, framed, supported and constructed seats of aluminium, fiberglass or double layer poly (accessory seats) or carbonfibre are permitted. Single layer fiberglass seats must have steel tube framework, 1/2-inch (12.7 mm) min outside diameter, for support. Aftermarket aluminium seats must have reinforced head rest. Magnesium seats prohibited.
6.3 WINDOW NET
A ribbon type or SFI spec 27.1 mesh type window net is mandatory on any full-bodied car required by the rules to have a roll cage. Window net must be securely mounted on the inside of the roll cage, with the permanent attachment at the bottom. All attachment points must be designed in an attempt to protect the driver and avoid contact with track surface or guardwall. Eyelet clips, dogleash hardware, hose clamps, etc. prohibited. Penetration of webbing, except as performed by manufacturer, prohibited. Any modification to net must be performed by manufacturer.
FIA reserves the right to regulate by guideline, the advertising which appears on the body of any car participating in FIA events, and may from time to time publish such guidelines.
7.2 AIR FOILS, WINGS
Air foils, canards, wings, and spoilers other than original factory equipment will only be permitted in open-bodied class cars (i.e.: Dragster, Street Roadster, and Altered) or as noted in Class Requirements. A positive locking device to prevent movement mandatory. No part to be within 6-inches (15.2 cm) of rear tires. Spring-loaded spoilers, wings or canards prohibited. Adjustment of air foils, wings or spoilers during run prohibited.
NOTE: A spoiler is mounted directly to the deck lid of the vehicle, such that air only passes on the top side of the device. An airfoil or wing is mounted on stands, struts or pedastals, such that air passes over the top and underneath the device. Minimum fastener size on all front wings, canards, etc. is 1/4-inch (6.35 mm). Ball lock pins prohibited.
7.3 COMPETITION NUMBERS
Any car competing at FIA events must display the driver's Competition number. Numbers must be a minimum 6-inches (15.2 cm) high and 1 1/2-inches (3.8 cm) wide. Class designation letters must be a minimum 3-inches (7.6 cm) high and 1-inch (2.5 cm) wide. Driver's competition number and class designation must be displayed in a legible manner in a contrasting color to the vehicle's background color, or light color on windows, in a prominent position, and be clearly visible to the Tower personnel. Class and numbers must be in the form of permanent decals or paint. The use of shoe polish in any form is prohibited.
All vehicles in all classes must have re-rolled or beaded edges on altered fenders. Flaring or spreading external fender lines prohibited. Front fenders may not be "drooped" on full fendered cars, except as noted in Class Requirements.
Each car in competition must be equipped with a minimum .032-inch (.8 mm) aluminum or .024-inch (.6 mm) steel firewall, extending from side to side of the body and from the top of the engine compartment's upper seal (hood, cowl, or deck) to the bottom of the floor and/or bellypan. Firewall must provide a bulkhead between the engine and/or fuel tank and driver compartment. In certain instances fiberglass, carbon fiber or other composites may be used. See Class requirements or consult FIA. Use of magnesium prohibited.
All cars without floors must be equipped with floor pans made of steel or aluminum which must extend the full length and width of the driver compartment to the rear of the driver's seat. Cars equipped with floors or bellypans made of fiberglass or other breakable material must have metal subfloors. In all cars with OEM fiberglass floors, a crossmember (minimum 2-inches (5.1 cm) x 2-inches (5.1 cm), .083-inch (2.1 mm) wall thickness square tubing) must be installed between frame rails for proper driver's seat, seat belt, shoulder harness and crotch strap installation. Bellypans and subfloors enclosing engine or driver compartment must contain suitable drain holes so that liquids and foreign matter cannot collect, thus creating a fire hazard. Minimum .032-inch (.8 mm) aluminum or .024-inch (.6 mm) steel. In certain instances, an FIA accepted panel made of composite material may be substituted for steel or aluminum. Contact FIA for list of accepted composite panels. Use of magnesium prohibited.
7.7 HOOD SCOOP
On full-bodied cars, where permitted, hood scoop may not extend more than 11-inches (27.9 cm) above height of original hood surface. On open-bodied, front-engine cars, scoop may not extend more than 11-inches (27.9 cm) above height of carburetor top. Scoop may have one INLET opening only. Transducers, sensors, hoses, wiring, etc. prohibited inside hood scoop. See Class Requirements for additional restrictions.
On open-bodied cars, or any other class car without a windshield, a metal or other fireproof deflector must be installed. Minimum size on Street Roadster and Altered class cars is 5-inches (12.7 cm) x 12-inches (30.5 cm). The deflector should divert wind, liquids and foreign matter over the driver's head, be securely mounted and installed in such a manner that it does not obstruct the driver's frontal view in any way.
7.9 WINDSHIELD, WINDOWS
Windshields and/or windows on all cars, when called for under Class Requirements, must be of safety glass, Plexiglas, Lexan (Polycarbonate), or other shatter-proof material. Windshields and/or windows must be clear, without tinting or coloring, except factory-tinted safety glass. Competition number decals are permitted on any window, windshield or backlite, except as noted in Class Requirements. Tape of any kind prohibited on any windshield or window.
All batteries must be securely mounted and may not be relocated into the driver or passenger compartments. Rear firewall of .024-inch (.6 mm) steel or .032-inch (.8 mm) aluminum (including package tray) required when battery is re-located in trunk. In lieu of rear firewall, battery may be located in a sealed .024-inch (.6 mm) or .032-inch (.8 mm) aluminum, or FIA accepted poly box. If sealed box is used in lieu of rear firewall, box may not be used to secure battery, and must be vented outside of body. Strapping tape prohibited. A maximum of two automobile batteries, or 150 pounds (68 kg) combined maximum weight (unless otherwise specified in Class Requirements) is permitted. Metal battery hold-down straps mandatory. Hold-down bolts must be minimum 3/8-inch (9.53 mm) if battery is relocated from stock and other than stock hold-downs are used ("J" hooks prohibited or must have open end welded shut.).
8.2 DELAY BOXES/DEVICES
A Delay Box or Delay Device is defined as any device (electric, electronic, pneumatic, hydraulic, mechanical, etc.) built for the express purpose of creating a delay between release of trans-brake or line-lock button, or release of foot or hand brake, or release of clutch pedal/lever, and the resultant action of the vehicle.
Delay Device may only display delay amount dialed in, analog or digital display permitted. See Class requirements for number of boxes/devices permitted. Delay device may only serve to create a pre-set delay between release of trans brake, line-lock, etc. and resultant action of vehicle. Delay device may only be connected to systems; i.e. trans brake, and/or line-lock, and/or clutch, dependant on vehicle, and throttle stop. Delay device connected to shift timers, data recorders, or any other equipment prohibited. Wiring of delay box/device must be fully visible, labeled and traceable to scrutineer. Only delay boxes/devices fitting this description will be permitted.
Any system that does not fit the above description is prohibited, and must be corrected before the vehicle will be passed through pre-event scrutineering. Further, discovery of a prohibited device at any time following pre-event scrutineering will be grounds for immediate disqualification from the event, loss of all FIA points for the season, and suspension from all FIA Championship Drag Racing Events for remainder of season. Additional penalties may be imposed in accordance with the FIA International Sporting Code. (See 9.1 COMPUTERS, 9.2 DATA RECORDERS)
Each car in competition must have a positive-action on/off switch, capable of de-energizing the entire ignition system, in good working order, located within easy reach of the driver. "Momentary contact" switch prohibited. Magneto `kill button'-type switches are prohibited.
8.4 MASTER CUTOFF
Mandatory when battery is relocated, or as outlined in Class Requirements. An electrical power cutoff switch (one only) must be installed on the rearmost part of each vehicle and be easily accessible from outside the car body. This cutoff switch must be connected to the positive side of the electrical system and must stop all electrical functions including magneto ignition. The external control switch for this cutoff switch will be clearly indicated by a red flash inside a white-edged blue triangle with a base of at least 12 cm (see drawing 25). The positions must be clearly indicated with the word "OFF". If switch is "push/pull" type, push must be the action for shutting off the electrical system, pull to turn it on. Any rods or cables used to activate the switch must be minimum 1/8-inch (3.2 mm) diameter. Plastic or keyed switches prohibited. Switches and/or controls must be located behind rear wheels on rear engine dragsters.
All cars must be self-starting. Rollers and/or push starts prohibited.
8.6 TAIL LIGHTS
All vehicles in ET must have as minimum requirement one working tail light for night operations. Strobe, flashing, high intensity, or other type lights that may distract other drivers are prohibited. Any other light emitting/receiving device (laser, infrared, light sensor, etc.) prohibited. Also see Class Requirements.
8.7 SWITCHES AND BUTTONS
All switches and/or buttons must be standard, mechanical connection type. Infrared, laser, retinal scan, fingerprint, light source or any other non-mechanical type switch and/or button prohibited.
SUPPORT GROUP: 9
Except those computers installed on stock vehicles by the new vehicle manufacturers for the proper operation of such vehicles, no vehicles may be equipped with computers which in any way effect the operation of the vehicle. Per class requirements, OEM or OEM-type electronic fuel injection permitted. All related wiring, sensors, etc. must be identifiable to the scrutineer. A computer is defined as any device (electrical, mechanical, pneumatic, hydraulic, etc.) that activates any function of, or in any way affects the operation of, the vehicle based on measurement, sensing, processing, etc., of any data related to the performance of the vehicle. Display or transmission of any data gathered or processed, to the driver or any remote location (telemetry), is prohibited (see 9.2 DATA RECORDERS).
Per class requirements timed or rpm activated shifters and the like permitted, but all automated functions must be preset before the run. Timer may only display timer amount dialed in, analog or digital display permitted. Devices may be removed at any time at discretion of FIA scrutineers.
9.2 DATA RECORDERS
Data recorders may be used to record functions of a vehicle, so long as they do not activate any function on the vehicle. Data Recorder may not be activated by the throttle, clutch, brake, etc., mechanisms, nor by the Christmas Tree, radio transmitters, sensing of wheel speed, inertia, laser device, or transmission of track position, must be activated by separate switch. Fifth wheel sensing devices prohibited on all vehicles (includes wheelie bar wheels). All lines sensing flow, pressure, etc., of fuel or oil must be metallic or steel braided. Transmission or display of data gathered or processed by data recorder, to the driver or any remote location, prohibited. Data may only be reviewed (print out, replay, etc.) after the run.
Any device (mechanical, hydraulic, pneumatic, electrical, optical, etc.) other than O.E.M. type, which assists in determining track location of the competitor's own or opponent's vehicle, is prohibited. Only O.E.M. type/style mirrors, mounted in conventional fashion, permitted.
Discovery of a device which displays, displays or transmits "on track", "track location" or "elapsed time" type data will be grounds for immediate disqualification from the event. Additional penalties may be imposed in accordance with the FIA International Sporting Code.
9.2A TELEMETRY DEVICES
Telemetry transmission of certain professional category vehicle parameters intended for the sole purpose of event television coverage, which meet applicable FIA criteria, permitted. Application for telemetry transmission(s) must be submitted in writing to FIA. Final, written authorization from applicable event Chief Steward mandatory.
9.3 FIRE EXTINGUISHER / SUPRESSION SYSTEM
On-board fire-extinguisher system is mandated under certain Class Requirements. If a hand-held fire extinguisher is carried on board the vehicle, it must be mounted in a secure manner; flip-open type clamps prohibited.
On-board fire supression systems must be manually controlled (pull-type only on FC and TAFC) Cold Fire 302, Fire X Plus, Halon FE1211 or 1301 or FM200 and mounted per manufacturer's specifications with the primary nozzle(s) directed in an attempt to protect the driver. Other agents classified by the FIA as Acceptable Total Flooding Agents (Feasible for Use in Occupied Areas) may be used. Bottles and lines must be mounted within the frame rails. Fire supression bottle activation cables must be installed inside frame rail where cables pass engine/bellhousing area. Bottles must be DOT approved and permanently mounted (no hose clamps or tie wraps). In the case of more than one bottle, each bottle must have its own distribution tubing and nozzles. The use of bottles, nozzles or tubing other than that recommended by the manufacturer is prohibited. Nozzle placement is extremely important; two nozzles are placed at the front of the engine, one on each side, and one nozzle is located in the driver compartment near the steering column, minimum. Upon activation of the system the contents of the bottle(s) must be totally discharged; partial-discharge systems prohibited. The bottles must be mounted in such a manner that should an explosion or failure of any mechanical component of the vehicle occur, the bottles will be protected from flying parts. Also, the position of the bottles in the vehicle must be high enough that they cannot come into contact with the track surface following loss of a tire or wheel. They should be protected from excessive temperature and mounted rigidly to the vehicle. Remote cables must be metallic (plastic or plastic-wrapped cables prohibited) and installed so they are protected in the event of an upset or collision. Follow the manufacturer's recommendations regarding installation, especially on bend radius and protection from crimping or kinking. All fire supression systems must use steel lines, steel or aluminium distribution nozzles and must be equipped with a pressure gauge. All bottles must be identified with a gross loaded weight figure. It is the responsibility of the competitor to weigh the bottle prior to each event.
If there is an external lever for activating the extinguishers, this must be indicated with a mark which complies with drawing n°24 and which is placed near this lever.
9.4 JACKS & JACKSTANDS
No work may be done under any car in the pit area while the car is supported by only one jack. Additional safety devices such as jackstands are mandatory to provide additional protection in the event of jack failure. Failure to observe this rule is grounds for immediate disqualification. TF, FC, PS, TAD and TAFC must use cradles/jack stand devices that attach to the frame (conventional jack stands prohibited) when working on and/or running engine in pits with vehicle in a raised position. Jackstand devices must be constructed as to provide a minimum ground clearance of 7-inches (17.8 cm) as measured from the ground to the outer diameter limit of the rear tires.
9.5 LIFTING DEVICES
Any form of mechanical, hydraulic or other leverage-type device for raising a car's driving wheels off the starting line surface is prohibited.
9.6 OVERSIZE TRAILERS
Those contestants utilizing semi-tractor/trailer equipment (18 wheelers) must close lift gate type rear doors after unloading/loading procedures are completed. Also, all extended ramps must be stowed after use. Maximum width of trailer and awning combination - not to exceed 22-feet (6.705 m).
9.7 PRESSURIZED BOTTLES
All pressurized bottles (i.e.: air, CO2, etc.) used for air shifters, clutches, etc., must meet, and be engraved as meeting, DOT 1800 pound (124 bar) minimum spec. All bottles must be securely mounted (hose clamps and/or tie wraps prohibited).
9.8 PUSH BARS
Push or tow starts prohibited.
9.9 TOW VEHICLE
Any vehicle used as a tow vehicle must have the driver's Competition Number displayed on the tow vehicle. Limit of six crewmembers in push-tow vehicle. Crewmembers must be inside cab or completely inside bed or truck, not to be seated on tailgate, standing on running boards or otherwise not completely inside vehicle.
9.10 TWO-WAY RADIO COMMUNICATION
The use of two-way radios for the purpose of voice communication between driver and crew is acceptable in all classes. Telemetry may in no way be used for gathering data or performing control functions.
It is mandatory that a driver be seated in the car in the normal driving position any time the engine is running, unless coupler or driveline is removed from vehicle. The practice of transbrake testing, converter stalls, line loc testing, and/or transmission warming is prohibited in all classes, in all areas of the event except in starting line approach areas beyond staging, or unless vehicle is on jack stands. Non-compliance is grounds for disqualification. TOP FUEL & FUNNY CAR - When starting this category of vehicle in the Pit Area - the car must be fully within the assigned space. NO PART OF THE REAR TIRE MAY EXTEND PAST THE END OF YOUR TRAILER. When occupying the "end spot" pit space, or if the neighboring trailer does not completely shield your car, it is mandatory to park a tow truck/car along side the race car while the engine is running.
Each member of a participant crew must be fully attired when present in the staging, starting and competition areas of the race track. Shoes are mandatory. Shorts, bare legs, tank tops, or bare torsos are prohibited when driving in any class.
Vehicles participating in drag racing events must be presentable in appearance at all times; those considered improperly prepared may be rejected by the scrutineer. The appearance of personnel attending contestant vehicles is equally important, and is subject to the same considerations.
10.3 ARM RESTRAINTS
Where mandated by Class Requirements, arm restraints must be worn and adjusted in such a manner that driver's hands and/or arms cannot be extended outside of roll cage and/or frame rails. Arm restraints shall be combined with the driver restraint system such that the arm restraints are released with the driver restraints. Refer to manufacturer for instructions.
Each driver of a vehicle entered in any event conducted at an FIA licensed track must have a valid FIA International License subject to inspection by officials at any time.
All license applicants must be at least 16 years of age; minimum age for drivers in Top Fuel, Funny Car and Pro Stock is 18 years of age. Drivers of the following type vehicles are mandated to have a valid FIA International Competition License.
The holder of a licence in a particular class may race in slower classes of the same type (for example, a type A Class 1 licence holder is authorised to compete in A/2 and A/4). Moreover, any other FIA driver's licence may replace a Class 4 drag racing licence.
A new driver who has not previously held a Competition License will be given a special cockpit-orientation (blindfold) test, and will be required to make six runs under committee observation. All license applicants are required to have a physical examination before making any test runs. For complete instructions, see reverse of license application form (available from FIA ASN). A licensed driver who is driving a new car in the same class, but in which he has no previous experience, must make one moderate run before making a full, hard run. No extra runs will be provided to the driver at FIA Championship events. A driver who is upgrading or crossgrading (bodied category to/from open wheel category) is required to take the cockpit orientation test and make three runs (per license application instructions). A licensed driver may drive a car classed under his license limitation. He is prohibited to cross over to or from the long wheelbase category to short wheelbase, dragster to bodied etc., unless specifically licensed for each.
10.5 DRIVER RESTRAINT SYSTEMS
A quick-release, 3-inch (7.6 cm) driver restraint system meeting SFI Spec 16.1 is mandatory in all cars in competition required by the rules to have a roll bar or a roll cage (Permitted in all other classes.). Driver restraint system must be clearly labeled as meeting SFI Spec 16.1 and be dated by manufacturer. System must be updated at two-year intervals from date of manufacture. All seat belt and shoulder harness hardware must be originally designed to be used with each other and produced by the same manufacturer. For harness installation, see illustration (Drawing 21). Cars using OEM or OEM-type seat may route crotch strap in front of seat instead of through seat. Only those units that release all five attach points in one motion are permitted. When arm restraints are worn with a restraint system that utilizes a "latch lever", a protective cover must be installed to prevent arm restraint from accidentally releasing the latch lever. Protective cover not required with 'duck bill' style latch lever. All harness sections must be mounted to the frame, crossmember, or reinforced mounting, and installed to limit driver's body travel both upward and forward. Seat belts may not be wrapped around lower frame rails.
Under no circumstances are bolts inserted through belt webbing acceptable for mounting. Check manufacturer's instructions.
10.6 HEAD PROTECTOR
In any car where a roll bar, or roll cage is installed, a padded head protector must be provided at the back of the driver's head and constructed in an attempt to prevent whiplash upon impact. The roll bar or cage must be padded wherever it may come in contact with the driver's helmet. Adequate padding should permit approximately 1/4-inch (6.35 mm) compression or meet SFI spec 45.1. The use of weather stripping and similar thin or low impact resisting materials is prohibited. A padded roll bar or cage alone is not acceptable as a padded head protector unless it is within 4-inches (10.2 cm) of the driver's helmet. A seat that incorporates a reinforced head rest is acceptable.
10.7 HELMETS & GOGGLES
As outlined under Class Requirements, drivers in all classes must wear a helmet meeting SNELL or SFI Specifications or BSI BS 6658-85 type A (including all amendments) Specs.
SFI Spec 31.1 = SNELL SA, open-face helmet.
SFI Spec 31.2 = SNELL SA, full-face helmet.
SFI Spec 41.1 = SNELL M, open-face helmet.
SFI Spec 41.2 = SNELL M, full-face helmet.
Drivers of ET cars (13.99 or quicker) must use a helmet meeting SNELL 85, 90, 95 or SFI 31.1, 31.2, 41.1, or 41.2 Specs. Exception : drivers of open bodied, supercharged, front-engine cars must use a helmet meeting SNELL SA90, SA95 or SFI 31.1 or 31.2 Specs. Effective 1-1-2002, the acceptance of SNELL 85 helmets will be discontinued.
Drivers in Top Fuel, Funny Car, Pro Stock, Top Alcohol Dragster and Top Alcohol Funny Car must use a helmet meeting SNELL SA90, SA95 or SFI 31.2 Specs, except as noted under Class Requirements. Effective 1-1-2002, the acceptance of SA90 helmets will be discontinued. See Class Requirements.
Drivers of any open bodied car wearing an "open face" helmet, must wear protective goggles. Modifications to helmet/visor/shield are prohibited. All helmets must have the appropriate certification sticker affixed inside the helmet.
10.8 NECK COLLAR
Must be commercially produced neck collar designed for racing. Two different types of collars are commercially available - a full 360-degree "donut" type or a pull-together "horseshoe" type - see Class Requirements for type specified. Modification according to manufacturer's recommendations, to fit helmet and driver's neck/shoulder spacing, permitted. Must be worn as per manufacturer's recommendations. Must meet SFI Spec 3.3 as per Class Requirements.
No more than one person is permitted in any car during any run, except one co-driver permitted in 14-second and slower ET cars; co-driver must be a minimum of 16 years of age. All occupants of push cars must be inside of car or pickup in a seated position while push car is in operation. Any time a car is started, whether in the pits, staging lanes, with self-starter, or anywhere else on the race facility, a competent driver must be in the driver's seat unless coupler or driveline is removed. Non-compliance is grounds for disqualification.
10.10 PROTECTIVE CLOTHING
Drivers are required to have as minimum requirements protective clothing labeled as meeting the following standards as per specific Class Requirements:
Except as outlined below.
Supercharged front-engine open-bodied car or any car with an automatic transmission in the driver compartment (i.e.: one without a floor over the transmission) must have a 3.2A/15 suit or as per Class Requirements.
All "suits" include a head sock, gloves and boots (3.2A/20 suit) or shoes (3.2A/15 suit). Suit can be one piece, or separate jacket and pants. Jacket and pants must each be labeled as meeting SFI Spec or appropriate FIA standard. All gloves must have a full layer of Nomex inside the glove. Leather palm gloves without a full layer of Nomex separating leather from driver's hand prohibited. Drivers in all open bodied front engine cars with open face helmet must wear a breather style face mask and protective goggles. Drivers in all open-bodied cars must wear SFI Spec 3.3 or appropriate FIA standard fire-resistant gloves. See Class Requirements.
10.11 SEAT BELTS
All cars not required by Class Requirements to use SFI Spec 16.1 driver restraint system must be equipped with an accepted quick release-type driver seat belt. Belts must be securely fastened to the frame, crossmember or reinforced mounting so that all fittings are in a direct line with the direction of pull. Seat belts may not be wrapped around lower frame rails (or any frame rail or crossmember). Steel castings of the type recommended by FAA, or U-bolt-type mounts are accepted. If used for installation, flat steel plates must be a minimum of 1/4-inch (6.35 mm) thickness and have rounded edges to prevent cutting seat belts. Under no circumstances can belts be installed with bolts through webbing. In all cars with fiberglass floors, a crossmember of minimum 2-inch (5.1 cm) x 2-inch (5.1 cm) x .083-inch (2.1 mm) wall thickness square tubing must be installed between frame rails for proper driver's seat belt installation. All cars in competition requiring a roll bar or when a roll cage has been installed or as outlined by Class Requirements, require a SFI 16.1 restraint system (See 10.5 DRIVER RESTRAINT SYSTEM).
NHRA Correction Factors
To convert your Quarter Mile ET and MPH to sea level times, multiply applicable factor times your ET or MPH.