Track Rule Recomendations ?

SECTION 1A
E.T. SUPER PRO, PRO, SPORTSMAN
7.50 (*4.50) seconds or slower
DESIGNATIONS
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 -
ENGINE: 1
1.1 ENGINE
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.
1.3 FUEL
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.
2.2 DRIVELINE
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.
2.3 REAREND
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
3.1 BRAKES
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.
3.2 STEERING
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.
FRAME: 4
4.1 BALLAST
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.
4.4 PARACHUTE
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.
4.7 WHEELBASE
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
5.1 TIRES
Racing slicks permitted. Minimum diameter of 13-inches on front tires of any Dragster.
5.2 WHEELS
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.
INTERIOR: 6
6.1 SEATS
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.
6.3 UPHOLSTERY
Optional.
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.
BODY: 7
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.
7.6 FIREWALL
Mandatory. See General Regulations 6.1, 7.5.
7.7 FLOOR
Mandatory. See General Regulations 6.1, 7.6.
7.8 HOOD
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.
ELECTRICAL: 8
8.1 BATTERY
Batteries must be securely mounted, may not be located in driver compartment. See General Regulations 8.1.
8.2 IGNITION
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
9.1 COMPUTER
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.
9.6 WARMUPS
See General Regulations 9.4, 9.11.
DRIVER: 10
(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.
10.2 CREDENTIALS
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.
10.5 HELMET
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.

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GENERAL REGULATIONS
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.
ENGINE: 1
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
1.2 ENGINE
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).
1.3 EXHAUST
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.
1.6 GASOLINE
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.
1.8 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
Property Grade A Grade AA
Methanol content;
weight percentage, minimum 99.85 99.85
Acetone and aldehydes;
parts per million, maximum 30 30
Acetone; parts per million,
maximum 20
Ethanol, ppm max 10
Acid (as acetic acid),
parts per million, maximum 30 30
Water content
parts per million, maximum 1500 1000
Specific gravity; 20°C 7928 7928
Permanganate time; minutes 30 30
Odor Characteristic
Distillation range at 1010 hPa
(760 mm Hg) not more than 1°C, including 64.4 ± 0.1°C at 760 mm Hg
Color; platinum-cobalt
scale, mix 5 5
Appearance clear-colorless
Residual on evaporation,
g/100 ml .001 .001
Carbonizable impurities;
color platinum-cobalt scale,
maximum 30 30

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.
1.12 SUPERCHARGER
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.
1.14 THROTTLE
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.
2.3 CLUTCH
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.
2.4 DRIVELINE
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.
2.5 FLYWHEEL
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.