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
