1. Safety Equipment:
Rules apply at all times car is on track.
At least SA 2000 approved helmet required.
SFI approved full fire suit, fire retardant
neck brace, gloves and shoes required.
Head and neck restraints.
Minimum three inch wide five point safety
belt assembly required and must be mounted securely to roll
cage. Recommended to be no more than one year old. Belts showing
wear, tear, or fraying must be replaced. Subject to safety
inspection at any time.
Roll bar padding required in compartment.
Collapsible steering shaft.
Driver side window net required minimum 16
inch x 20 inch ribbon or mesh style and must be mounted so latch
is at top front of window, or arm restraints.
Kill switch required within easy reach of
driver and must be clearly marked "off and "on".
2. Frame:
OEM complete, 1964 or newer, American rear
wheel drive passenger car frame only.
No sports car frames.
Frame must be full and complete, cannot be
widened or narrowed, and must be able to support roll cage on
both sides, except:
Weight jack in original center line of
spring tower allowed.
Frame may be cut a maximum 36 inches
forward from center of rear end housing.
Horns may be removed in front of steering
box.
Front cross member may be notched and
boxed for radiator and/or steering clearance.
Maximum seven inch wide opening in side
of spring tower for spring removal.
Maximum two inch wide four inch tall
frame stiffener may be welded directly to outside of left
side frame rail.
Minimum wheelbase 108 inches, maximum 112
inches, both sides.
No part of frame can be lower than four
inches from ground except front cross member.
3. Roll Cage:
Must consist of continuous hoops, minimum 1 ¾
inch O.D. tubing, with a minimum wall thickness of .095 inch for
main cage, frame mounted in at least six places, low carbon or
mild steel recommended.
Must consist of a configuration of front,
rear and top hoops connected by tubing on sides or side hoops.
Drivers head must not protrude outside cage
with helmet on.
Roll cage must be securely supported and
braced with minimum one cross bar in top halo.
Foot protection bar required.
Main cage no further forward than rear of
engine.
All bars forward of cage must be lower than
hood.
4. Door Bars:
All driver side door bars and uprights must
be 1 1/2 inch O.D. and .083 inch wall thickness.
Minimum three driver side door bars, parallel
to ground and perpendicular to driver, and welded to front and
rear of roll cage.
Passenger side must have at least one cross
door bar, horizontal or angled, minimum 1 1/4 inch O.D. and .083
inch wall thickness, and one top door bar, minimum 1 ½ inch O.D.
and .083 inch wail thickness.
Steel door plate, 18 gauge or .049 inch
minimum thickness, must be securely welded to outside of door
bars and cover area from top door bar to bottom door bar and
from rear hoop down post 5 inches in front of seat. Must be
visible for inspection.
5. Body:
Body may extend no more than 2 inch beyond
outside of rear tire.
Must be same width, front to rear, and
parallel to OEM frame.
Engine compartment must remain open (no side
panels).
Hood must be enclosed at rear.
No panel in front of right door to engine
compartment.
No inner panels.
No car covers.
Must have front windshield and rear window
support posts.
Driver and passenger side windows must have
at least 12 inch opening, measured at center of window, between
lowest point at top of window, whether interior or body.
May use Lexan in sail panels.
Must be fiberglass or metal full size roof,
rounded in all directions.
Maximum 4 inch plastic skirting allowed on
bottom of doors and quarters.
No reflective doors or quarter panels.
Outside of tires must be widest part of car.
Spoilers max 8 inch tall.
6. Driver Compartment:
Must have minimum three windshield bars in
front of driver.
Lexan or aluminum cowl panel in front of
driver can be no wider than cockpit and no further back than
steering wheel.
Minimum .125 inch aluminum, or .060 inch
steel, complete floor pan required.
Aluminum high back seat only and must be
bolted in next to left side frame rail and ahead of rear tires.
Bottom of seat can be no lower than bottom of
frame rail.
Driver must be sealed off from track,
driveline, engine, fuel cell, canisters and pumps.
Oil coolers must not protrude above interior.
Accumulators cannot be mounted between driver
and left side door bars.
No devices that would enable driver
adjustment to alter wheelbase or for weight jacking while car is
in competition.
No mirrors or reflective sun visors.
7. Front Suspensions:
All components must be steel, unaltered OEM,
in OEM location, and replaceable by OEM parts, except:
Tube type upper A frames with
aluminum/steel cross shaft, and mounts can be moved.
OEM replacement lower A frames. Rubber,
nylon or steel lower A frame bushings, no offset or bearing
type.
Welded or bolted shock mounts on lower A
frame.
Lower A frame mounts and bolt holes on
frame must be in OEM location.
OEM ball joints only.
Sway bar must be unaltered OEM
8. Steering:
All components must be steel, unaltered OEM,
in OEM location, except:
Outer tie rod end and adjustment sleeve
may be replaced by a minimum .625 inch steel rod end and
steel tube.
Spindles can be ground for brake caliper
clearance only.
Unaltered, OEM replacement Pinto spindles
must be right and left, and of same design.
Bolt on spindle savers allowed.
Steel steering shafts and knuckles only.
Steering quickner, steering wheel and
quick release may be aluminum.
Cockpit steering may be modified, must be
kept on left side.
No rack and pinion.
9. Shocks:
One steel, nonadjustable, unaltered shock per
wheel.
One additional shock allowed on rear
suspension.
No bumpers or stops.
No threaded body, front coil over, air, or
remote reservoir shocks.
No Schrader valves.
Front half may be shielded.
10. Springs:
One coil and/or leaf spring per wheel only.
One additional spring allowed on pull bar or lift bar, may be
progressive.
Any coil spring.
No torsion bars or air bags.
11. Rear Suspension:
All components must be steel.
No covers allowed.
Rear of frame may be altered to accept leaf
or coil springs.
Steel coil over eliminators. Steel 5 inch
coil over kits allowed -- must conform to shock and spring
rules.
One mechanical traction bar (pull or lift,
not both), spring size optional.
Rubber bumpers allowed only on pan hard bar
and mechanical traction bar.
No sway bar.
Chains may be used on rear suspension.
12. Rear End:
Any steel approved O.E.M. passenger car or
truck rear end allowed.
May run quick change rear end.
Safety hubs (floater) allowed.
All components must be steel, except lowering
blocks, axle cap and drive flange.
Inspection hole in housing is required.
Full steel spool, steel mini spool or welded
rear ends only.
Steel axles only.
No cambered rear ends.
One piece drive flange only.
No torque dividing differentials.
No scalloped ring gears.
13. Bumpers/Rub Rails:
Steel only.
Bumpers must be used both front and rear at
all times and welded, or mounted with minimum 1 ¼ inch O.D.
tubing, .065 wall thickness on front and .095 wall thickness on
rear.
Two bar front bumpers must be mounted frame
end to frame end, no wider than width of material outside frame
horns and with bottom loop parallel to ground. Top bar must be
directly above bottom bar, minimum 6 1/2 inches apart, measured
center to center.
Rear bumper and nerf bars can be no wider
than tires.
14. Tires/Wheels:
Asphalt pull offs allowed, must stay on 8
inch rim.
8 inch wheels only.
IMCA type tire, American Racer or Hoosier
(asphalt) or 8 inch Southwest speed racing tire. 60 compound.
Tires must be no softer than 45 durometer
after the main event, with no cool down period.
Grooving and siping allowed.
Aluminum or steel spacers only.
Right side bead locks only.
Rim mounted bleeder valves allowed.
15. Brakes:
Must be steel approved OEM, operative four
wheel, drum or disc.
Must maintain minimum OEM dimensions for
hubs/rotors and calipers, cannot be lightened.
Bolt pattern may be changed.
Larger studs allowed.
Rear rotors may be aftermarket, minimum 0.810
inch thickness.
Vented rotors only, no scalloped rotors.
No brake shut off or pressure sensitive
devices.
One proportioning device allowed, front to
rear only.
Brake lines must be visible.
16. Exhaust:
Round tube headers only.
All primary header tubes must enter directly
into one collector, at same point at end of header.
Must be no louder than 95 db. from the press
box.
Mufflers mandatory.
All exhaust must go thru mufflers.
Two per car, one per header.
No exhaust sensors.
17. Fuel System:
Mechanical or belt driven fuel pump only.
Racing fuel cell required. Maximum 32 gallon
capacity and must be in minimum 18 gauge steel container.
Cell must be securely mounted behind rear
axle, between rear tires, minimum of four inches ahead of
bumper, minimum of ten inches above ground.
Must mount with minimum two 1/8 inch thick
solid steel straps, two inches wide around entire cell.
All cell mounts must be steel, securely
welded to frame cage.
Protective tubing must cover rear and extend
past both sides of cell. No part of cell shall be lower than
protective tubing.
Fuel cell vents, including cap vent, must
have check valves.
Pick up must be on top or right side of cell.
Limit of one fuel filter.
No cool cans or top flow air cleaner
housings.
One naturally aspirated 2 or 4 barrel
carburetor only. No adjustable carburetor spacers.
18. Fuel:
Gasoline or alcohol.
NO performance enhancing additives.
Upper cylinder lube allowed.
Fuel sample may be taken from any car at any
time.
19. Weight:
All cars must weigh a minimum of 2,350 lbs.,
with driver, as they come off the track.
No weights and/or loose objects in driver
compartment.
Weights must be securely mounted to frame or
roll cage and painted white with car number on it. Must be
attached with at least two ½ inch bolts. No titanium, magnesium
or carbon fiber products. No gun-drilled, tubular, hollow bolts
or studs. Steel fasteners only.
20. Battery/Starter:
One 12 volt battery only, must be shielded
and securely mounted between frame rails. Must have capability
of starting without being pushed or pulled.
Must leave initial staging area on demand,
unaided, or go to rear of that race.
Reverse mounted starters with OEM case
transmissions only, see transmission rules for specifics.
21. Gauges/Electronics:
No transmitting or listening devices, timing
retard controls, digital gauges, including tach.
No electronic monitoring computer devices
capable of storing or transmitting information except analog
tach.
No adjustable ignition control boxes. Only
one 12 volt ignition box allowed. Must be out of driver's reach.
No additional ignition accessories allowed. Only change allowed
to ignition box is one high end rev-limiter setting. This
setting can be changed through one chip only, or an internal
setting inside box.
No electronic traction control devices
22. Transmission/Driveshaft:
Must have at least two forward gears and one
reverse, plus a neutral position. With engine running and car in
still position, must be able to engage car in gear and move
forward, then backward.
OEM production type approved aftermarket
transmissions allowed – two speed, three speed, four speed and
automatic.
No five speed (or more) transmissions.
No in and out boxes or quick change
transmissions allowed.
Functioning shaft levers must be in OEM
location on all OEM production type transmissions.
Bert, Brinn or Falcon allowed.
Flexplates must be full, steel, unaltered
OEM, or OEM replacement.
Flywheel/flex plate must bolt to engine
between clutch assembly and crankshaft and all driveline
components within bell housing must rotate while car is any
gear.
Transmission must be one of the following
designs:
Manual:
Must have a standard OEM case and working
disc type clutch or approved cone or disc type coupler
inside an explosion proof steel bell housing.
One flywheel only, minimum 8 ½ inch
diameter.
Diameter of clutch disc must be a minimum
of 5.5 inches.
Clutch assembly must be steel, except
housing, which must be steel and/or aluminum.
Bell housing can have only a hole for
throw out bearing lever of hose, must be 270 degrees around
top of clutch and flywheel area.
Standard or reverse mounted starter
allowed, must directly engage flywheel.
Automatic:
Must remain in OEM or OEM replacement
case, with a functioning OEM appearing pump.
Must have approved scatter shield.
Scatter shield must be constructed of minimum of 1/8"
x 3" steel, 270 degrees around flex plate.
Aftermarket:
Must be approved, aluminum case, with
internal clutch.
Must bolt to explosion proof steel bell
housing, and use full, steel, unaltered OEM or OEM
replacement flex plate with starter mounted in OEM location.
Drive shaft must be minimum two inch diameter
steel drive shaft and must be painted white.
Steel slip yokes only.
360 degree drive shaft loop required and must
be constructed of at least ¼ inch by two inch steel, or one inch
tubing, mounted six inches back from front U joint.
23. Engine Compartment:
Rear of engine (bell housing flange) must be
mounted at least 72 inches forward from centerline of rear axle.
Engine offset must be kept within 2 inches of
centerline of front cross member with engine level.
Minimum 11 inch engine height from ground to
center of crankshaft.
Radiator must be mounted in front of engine.
Overflow tubes must be directed to ground
between frame rails.
24. Engine Specifications:
Any American make engine allowed.
Steel heads, blocks and oil pan only.
OEM block only, except no GM Bowtie, Ford SVO
or Chrysler W2 blocks.
No mushroom lifters, cannot alter lifter
bores.
All engines must be able to be used in
conventional passenger car without alterations.
Engine mounts cannot be removed or altered.
Castings and fittings must not be outside of
engine.
"Wet" oiling system only.
Aluminum heads allowed but must bolt 40 lbs.
In front of motor plate.