ONA Teams
Competition Rules
General Rules
General Rules

Approved February 2007

1. Chassis — Front engine dragster only. Maximum wheelbase: 225 in. Current NHRA Pro tag meeting SFI spec 2.2B is required. Maximum overhang limited to 30 inches. Maximum canard wing area is 450 square inches per side. Canards may not extend more than 2 inches outside rear tires. Tallest point of front wing must be below top of front tire and may not extend outside of front tires. Total front wing area must not exceed 500 square inches. Maximum wicker on canards and wings is one half inch (.500"). Front wings and canards are the only aero surfaces allowed.

2. Weight — Weight - 4.40 lbs. per CID. (Weight includes driver.)

3. Engine — Engine - Any type of block may be used in cast iron or cast aluminum. Billet aluminum blocks allowed. Displacement limited to 470 cu. in. Any new block design must be submitted to ONA for approval. Alloy and billet heads allowed, but must conform to stock OEM specifications, including valve size, valve angle, and rocker arm location. Billet heads and blocks must remain in "as-manufactured" form.

4. Fuel system — Fuel lines not permitted in the driver's compartment. Fuel shutoff operable from the driver's seat is mandatory. Fuel tank must be equipped with a positive locking screw-on cap. Maximum of one fuel pump, no overdrive. Pump gears/rotors must retain stock outside diameter, depth, and tooth/lobe count, as manufactured (Enderle 1100 and Hilborn -4: 1.350" O.D. X 1.100" depth; Settles: 3.000" O.D. X .750" depth; Waterman: 1.712" O.D. X .850" depth.) Maximum of 24 jets/nozzles; 8 in the injector hat and 16 in the manifold. "Y" nozzles may be used in lieu of individual nozzles in manifold. No down nozzles or fuel management systems allowed. Electric/electronic and/or pneumatic control of fuel system is prohibited. No composite materials allowed in injector hat and/or scoop. Hat must retain nostalgic appearance (internal modifications allowed.) Scoop height is limited to 12.5 inches. above throttle body, as measured from centerline of throttle shaft to top of scoop. Air intake area limited to 75 square inches.

5. Supercharger — Roots-type blower only. Rotor helix angle is not to exceed that of standard 6-71 series GM-type rotor. Maximum rotor length is 15 inches. Maximum rotor cavity is 5.840 inches. Maximum case length is 18.5 inches. Maximum manifold height is 8 inches. as measured from valley gasket surface to blower mounting surface. Blower restraint meeting SFI Spec 14.3 spec is required, and the manifold must contain an SFI spec 23.1 burst panel. Blower overdrive limited to maximum of 14% (less than 15%). Supercharger belt guard required.

6. Ignition — Limited to single magneto or single coil type ignition only. Ignition advance or retard devices allowed, but must be driver-actuated only. No magneto larger than the MSD 44 allowed.

7. Clutch/reverser — Clutch and flywheel must meet SFI spec 1.3 or 1.4. Maximum of 3 disks and 6 fingers/levers. All clutch movement must be made manually by the driver. No ratchets or staged systems allowed. Flywheel shield (bell housing) meeting SFI spec 6.2, with current certification, is mandatory. Maximum bell housing depth is 8.625 inches. Clutch and direct drive only. No transmissions allowed. Reverser required, and must have SFI spec 4.1 blanket.

8. Driveline — Driveline must be fully enclosed. Cover material shall be minimum .063 inch aluminum. Couplers are mandatory—absolutely no U-joints.

9. Rear end — Full floating rear axle assembly required. Rear end must be secured with pinion support. Live axle required. Gear ratio limited to 3.70 or lower (meaning nothing numerically lower than 3.70).

10. Rear wheels — Either tubes with liners, or beadlock wheels may be used.

11. Brakes/Parachutes — Two wheel rear disc brakes and fire retardant dual chutes required.

12. Seat Belts — A 5-point, 3 inch wide harness system, meeting SFI spec 16.1, with fire retardant covers is required. Driver arm restraints required.

13. Helmet and Protective Clothing — Helmet must meet Snell SA2000, SA2005, or SFI 31.1A, 31.2A, or 31.1/2005, or later specifications. All helmets must have the appropriate certification sticker affixed inside the helmet. Driver must wear full SFI spec 3.2A-20 fire suit with arm restraints, SFI 3.3 neck collar*(See rule 14), SFI 3.3-15 boots, SFI 3.3-15 gloves, and adequate face protection. Any driver attempting to run without the required safety equipment will be disqualified and not allowed to run.

14. Head and neck restraint device/system SFI spec 38.1 head and neck restraint system is mandatory. When using a head and neck restraint device/system, at all times that the driver is in the race vehicle, from the ready line until the vehicle is on the return road, driver must properly utilize the SFI-approved head and neck restraint device/system, including connecting the helmet as required for full functionality of the device. The device/system must meet SFI Spec 38.1 and must display a valid SFI label. The head and neck restraint device/system, when connected, must conform to the manufacturer's mounting instructions, and it must be configured, maintained, and used in accordance with the manufacturer's instructions. Head and neck restraint device/system may be used with or without a neck collar.*(See rule 13)

15. Fire Control — Ten pound (minimum) onboard fire system meeting SFI spec 17.1 required. Fire control system must be mounted per manufacturer's instructions. Minimum of one nozzle aimed at the driver and one nozzle aimed at the front of the engine. Lower engine containment blanket/diaper meeting SFI spec 7.1 is required.

16. Data recorders allowed, but cannot perform any function of the driver or in any way operate any system on the vehicle.

17. General Procedures — Turn around time between rounds will be 90 minutes from the time that the last pair in the session runs.

Also See: General Event Rules


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