The blower restraint straps and fuel lines must be installed such that when the restraint straps are fully extended no load is placed on any of the fuel lines. Belt guards shielding both fuel and oil lines are mandatory. All other superchargers require a SFI 14.1, 14.2 or 14.3 Supercharger Restraint. All cars using 12-71 or 14-71 superchargers must have a SFI 14.2 or 14.3 Supercharger Restraint with approved bag from same manufacturer.
All lines on supercharged alcohol cars must be routed in such a way that they are not directly in line with cylinder head gaskets at the front, rear, or side of the cylinder heads.Īll entries must be self-starting with an onboard starter and battery.Īll supercharged entries may utilize a 14-71 (or smaller) standard or hi-helix supercharger. Label must indicate date, PSI, and tester ID label must be impervious to fuel and brake-clean. Competitors may test and tag their own lines.
Permitted on non-supercharged or non-turbocharged entries only.Īll flexible-pressure oil lines, excluding return lines and any line 30psi or lower in pressure, must pass a minimum 300psi test for 30 seconds with no indications of separation, weeping, leaking, etc. 118 mild steel tubing.Ĭatch-can mandatory for coolant overflow one-pint (16-ounce) minimum capacity. All front-mounted fuel systems must be mounted between frame rails and enclosed in a round tube frame, minimum 1 1/4-inch O.D.
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If fuel tank/cell is mounted in rear, it must be vented to the outside of the body and equipped with a flash shield to isolate system from driver compartment. No part of the fuel system may be mounted on firewall or in flywheel/flexplate area. Nitromethane and propylene oxide prohibited. NHRA-accepted racing gasoline, gasoline, alcohol, gasohol, ethanol, permitted. If zoomies are utilized must be turned upward minimum three degrees. Exhaust gases must be directed out of the car body, rearward, away from driver and fuel tank. See General Regulations 1:8.Ĭompetition-type exhaust systems permitted. A nonflammable, oil-absorbent liner mandatory inside of retention device. The belly pan must extend from frame rail to frame rail and extend forward of the harmonic balancer and rearward to the rear motor plate and must incorporate a minimum 2-inch-high lip on all sides. Harmonic balancer meeting SFI Spec 18.1 mandatory.Īll cars must utilize an NHRA-accepted lower engine oil-retention device may use a belly pan in lieu of a device attached to the engine. Throttle stops prohibited.Īny internal combustion engine allowed with any modification. Any cars running quicker than 6.00 seconds must meet all comparable requirements for A/PM or AA/PM.Ĭarburetors, fuel injection or electronic fuel injection permitted. Refer to the current NHRA Rulebook and/or rules revisions for additional vehicle/driver requirements, specifications, and general regulations. * Divisions 6 and 7 minimum weight for all entries 2100 pounds. Supercharged or turbocharged big-block, 2,600 pounds. Supercharged or turbocharged small-block, 2,150 pounds. Naturally aspirated big-block: 2,350 pounds. Naturally-aspirated small-block: 1,900 pounds. Numbers must be at least four inches high. Qualified fields with competition conducted in a dial-in E.T.
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Top Sportsman Rules Top Sportsman RulesĬlass is for full bodied side steer type vehicles only.
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