SOUTHWEST SPEEDWAY
PURE STOCK CLASS RULES
Summer
2008
General Rules.
1. The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing
events at Southwest Speedway and to establish minimum acceptable requirements for such events. These rules
shall govern the condition of all events at Southwest Speedway, and by participating in these events, all participants are
deemed to have complied with these rules. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM
PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS. They are intended as a guide for the
conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official.
2.
The race directors shall be empowered to permit minor deviation from
any of the specifications herein or impose any further restrictions that in his/her opinion do not alter the minimum acceptable
requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS.
3.
Any interpretation or deviation of these rules is left to the discretion
of the officials. All decisions are final.
4.
No high performance stock or otherwise parts are allowed in this class.
Suspension, engine and drive train must remain stock to the make and model of car being raced.
5.
The Board of Directors reserves the right to tech any car at any time.
BODY RULES.
1.
Factory specifications of any American made car from 1966-1995.
2.
No vans, trucks, station wagons, or convertibles.
3.
Minimum weight with driver:
321
cubic inch or less must weigh 3,400 pounds.
322 to 367 cubic inch must weigh 3,600 pounds.
368 cubic inch or more must weigh 3,800 pounds.
4.
The minimum weight of the car must be displayed in the upper rear corners
of both front fenders in minimum 3 inch numbers.
5.
No reinforcing, cutting, welding, or modifications are allowed except as
specified herein.
6.
Doors may be gutted for door bars (roll cage) only.
7.
Front wheel wells only may be removed.
8.
All doors must be welded or bolted shut.
9.
Body must match frame and wheel base.
10. All glass and burnable material must be removed.
11. All cars must begin each program with a complete body.
12. After market stock appearing poly nose pieces with stock bumper underneath allowed.
13. All cars must have front and rear tow hooks.
ROLL CAGE.
1.
A 4 or 6 point roll cage is mandatory.
2.
All cars must have one (1) post by each windshield post and two (2) behind
the driver with all four (4) connected at the top with a roof hoop.
3.
Front engine hoops allowed.
4.
All cars must have angle bar from the driver’s front of the roof hoop
to the right rear of the roof hoop.
5.
All cars must have a minimum of three (3) door bars on driver’s side.
SAFETY, BELTS and SEATS.
1.
Each driver must have a fire extinguisher in the pits.
2.
Aluminum racing seats ONLY.
3.
A tail-light in the rear window is required.
4.
Seat belts must consist of a three (3) inch lap belt and double two
(2) inch shoulder belts that release with one (1) mechanism.
5.
All seat belt mounting points must be secure and made of metal using a minimum
of one-half (½) inch Grade 8 bolts. Shoulder belts should be mounted six (6) inches lower than the
driver’s shoulders.
6.
Seat belts must be secured to seat frame and/or roll cage or car frame.
7.
A driver’s side window net or arm restraints are mandatory.
8.
Windshield screener bars a minimum of four and three-eighths (4 3/8) inch,
or a protective screen is mandatory.
9.
Full face Snell approved helmets only.
10. A fire retardant driving suit, neck brace, and Nomex racing gloves are mandatory.
ENGINE.
1.
STOCK, STOCK, STOCK!
2.
Stock cast iron intake and exhaust manifolds. Exhaust
must exit underneath car. No center dump exhaust manifolds on Chevrolets. No aluminum
intakes.
3.
No porting or grinding of casing numbers.
4.
No headers.
5.
Any hydraulic camshaft. No
roller cams.
6.
Stock springs must be run, 90 pounds closed, maximum .030 shim.
NO AFTER MARKET SPRINGS.
7.
Screw-in studs for rocker arms, if stud mount is not machined are acceptable.
May also be pinned. NO ROLLER ROCKER ARMS.
8.
Cylinder heads must match engine. No inter-marriage allowed.
9.
Chevy 350 or 400 cubic inch engine must run a minimum of 74 cc head.
Must be stock production, no angle milling but flat milling acceptable. Head must be a minimum of
70 cc after clean up.
10.
Ignition must be stock point or electronic system. NO
MSD boxes or super coils.
11.
Any flat top 4-valve relief piston or dished pistons. Absolutely
no flat top pistons. Piston must be below deck.
12. Solid motor mounts acceptable as long as in stock location.
CARBUREATORS AND FUEL
1.
One 2-barrel carburetor only. Must be stock for that car.
Limit of one 1 3/8” carburetor spacer or adapter, including gaskets, measured between the intake manifold and
carburetor base. No sliders. No fuel injection.
2.
No front bowl Holley carburetors.
3.
No electric fuel pumps. Mechanical fuel pump (but NOT
belt driven) acceptable.
4.
Pump gas only.
RADIATOR
1.
One radiator only.
2.
May be aluminum.
3.
Must be mounted in stock location.
TRANSMISSION
AND REAR ENDS
1.
Stock OEM transmission and clutches only.
2.
No aluminum flywheels or multi-disc clutches.
3.
No stall converters.
4.
Posi-traction or welded rear ends are acceptable.
5.
Rear end must match model of car. No inter-marriage.
6.
Drive shaft must be painted white. Loops must be made
of ¼” x 2” steel constructions, located 6” to 12 “ behind front U-joint. NO CHAIN.
BATTERY
1.
The battery may be moved inside the car and must be covered and securely
fastened. No tarp straps.
2.
No 16-volt batteries.
BRAKES, STEERING
and SUSPENSION
1.
Factory stock brakes including master cylinder.
2.
All cars must have 4 working brakes at all times.
3.
No altering of suspension or steering.
4.
Quick release steering wheels allowed.
5.
Stock-type springs, torsion bards, and shocks only. No
racing shocks. No spring spacers.
FUEL TANKS.
1.
Fuel tanks may be moved to trunk area but must have a firewall between driver
and fuel tank.
2.
Fuel tanks must be mounted using a minimum of two 2” steel straps.
3.
Fuel cells are optional but highly recommended.
TIRES
and WHEELS.
1.
Any steel wheel up to a maximum of 8” wide.
2.
Tires must be DOT street tires. No recaps.
Maximum of each series tires is: 255-R60. 255-R65, and 255-R70.
3.
No grips or racing tires of any kinds.
4.
No grooving or siping.
5.
No wheel spacers.
6.
Minimum of right rear wheel must use 1” lug nuts with white spoke rim
or racing rim. Strongly recommended 5/8“ studs.
LETTERING and NUMBERING.
1.
Cars must be neatly numbered using numbers from 1 to 99.
2.
Numbers must be at least 15” high x 10” wide with a body
of 3” must be painted or stickered both sides of the car and roof.
3.
A 6” x 6” plate with number must be placed on the front and rear
windows.
4.
Numbers must be in contrasting color to car.
5.
Track may ask for removal of offensive or suggestive lettering or graphics.
TECH INSPECTION BY TRACK.
1.
Protest Rule: Only a driver of a car within the same class
can protest to have another car “torn down”. The request must be made to the pit steward and
paid for prior to the start of the feature race.
2.
Tear down costs $100 top end (car, intake, and one head) and $100 bottom
end (pull oil pan) or $200 for both.
3.
Top 5 places in feature to draw chip after crossing scale. Odd
color chip drawee subject to tech inspection by track. Car to remain unaltered by south end of scale.
