2003 Pro Stock Rules and Car Specs
Farley, West Liberty, Dubuque
Stock appearing nose section is required. Nose extensions may not flair out,
they must run parallel with door panels. Rear roof panels may be mounted per
body style of car using. Left and right side roof panels must be the same length
and design. See attached for roof and window posts dimensions. Rear of car must
be enclosed between bumper and deck lid, attached top and bottom. Rear filler
must be rigid and tight to the deck. Minimum filler width is frame rail to
frame rail. Maximum deck height is 36" from the ground. Maximum spoiler
height from deck is 8" inches. Spoiler braces a maximum 8" tall
and 16" long. Rear quarter panel may be no longer than 52" from the center of
rear axle to rear of deck. The floor pan of the driver's compartment from
drivers seat forward and up a minimum of 6" in front of feet must be made of one
sheet .125 thickness metal.
WHEELBASE: Minimum 103 inches, no tolerance.
ENGINE: Any size engine allowed. Any intake is allowed, with a maximum of
1 1/2" allowed between top of intake and bottom of carb. One 2-barrel Holley
4412 (500 cfm) allowed, air horn mandatory. Starter must be operable. No
aluminum heads or block allowed. Valve angle must be within 1 1/2 degree of OEM.
Roller rockers and cam allowed. No dry sumps allowed. All cars will be required
to be equipped with a round dry element type air cleaner, maximum height four
(4) inches. Maximum diameter seventeen (17) inches. All air cleaners are
required to have a complete metal top and bottom. No carburetor air dams or
devises permitted to increase the airflow to the carburetor, either inside or
outside of the air cleaner, and must rest on carburetor.
CHASSIS: Cars with a fabricated front stub are allowed a maximum 6"
engine setback. Cars with a factory front stub will be allowed an 8" setback. To
be considered a factory front stub, you must retain stock steering and idler
arm, lower control arms, and standard frame rail.
WEIGHT: Standard weight is 2600 lb., post race. Cars with a stock
stub will be allowed a 150 pound break. Cars running a GM 358 CI motor or less,
a Ford or a Dodge with a 364 CI motor or less will also be allowed an additional
150-pound weight break.
Examples; Fabricated Stub, Big Motor-2600 lb.
Fabricated Stub, Small motor-2450lb
Stock Stub, Big Motor-2450lb
Stock Stub, Small Motor-2300lb
BATTERY: Must be mounted in a safe and secure manner.
STARTER: Starter must be operable and start car.
FUEL: Mechanical fuel pump only, mounted in stock location. Fuel must be
gasoline only. The gasoline shall not be blended with alcohol's, ether's or
oxygenates and it shall not be blended with aniline or it's derivatives, nitrous
compounds, or other nitrogen containing compounds. No icing or cooling of the
fuel system is permitted.
RADIATOR: Any type of radiator is allowed which will fit under the hood
with minor cutting or altering stock fit of hood.
All cars will be required to be equipped with four (4) wheel operational brakes.
Brake rotors will be required to be made of cast iron or cast steel; calipers
may be made of steel or aluminum. CARBON FIBER OR CERAMIC BRAKES WILL NOT BE
WHEELS: 10 inch wide steel. Beadlock on right rear only. No aluminum
TIRES: Required tires are Hoosier Dirt Bozz 285-265-255/65-15. Medium
compound only allowed. Must durometer at 50-pt minimum at any time.
REAR ENDS: Any type of truck or floater type allowed. Quick change
TRANSMISSION/CLUTCH: Any type transmission allowed. Flywheel
scattershield is required on all clutch transmissions. No in/out boxes allowed.
Brinn and Bert type transmissions allowed. All cars must have a reverse.
WEIGHT:. All weights must be painted white and have the car number on it.
They must be securely fastened with 7/16 or larger bolts. Weights must be in
car, but outside driver's compartment. No weight allowed on rear bumper or
fuel cell braces.
SEAT BELTS, SEATS, HELMETS, AND WINDOW NETS: All seats must be made of
aluminum or steel and approved by Officials. All seats will be required to be
mounted to the frame or the roll cage of the car. All cars will be required to
be equipped with a minimum 5-point harness. All belts will be required to be
mounted to the frame of the car or to the roll cage. Helmets should be of
full-face shield type and are subject to inspection. All cars will be
required to use a full size window net in the driver's door at all times.
Fire resistant shoes & gloves recommended. Fireproof drivers suit required.
ROLL BARS: Four-point roll cage of suitable tubing base and
upright members shall be welded solidly to the frame. Cage shall be braced to
rear frame and diagonally side-to-side between rear uprights. At least 3 drivers
side bars between the 2 uprights running horizontally, outside diameter of the
tubing must be at least 1 1/2" OD with .095 wall thickness. Drivers side vent
bar and a diagonal bar in the halo are also required. Flame retardant roll cage
padding required on all pipes within reach of driver.
MIRRORS: NOT ALLOWED
NO TRANSMITTING OR RECEIVING DEVICES
FUEL CELL/GUARD: An approved manufactured fuel cell with a maximum capacity
of 32 gallons. Fuel cell will be required to be encased in a metal container.
All fuel cells must be equipped with a rollover valve in the vent fitting and in
the fuel fill. Fuel cells must be required to have pick up location on top of
cell. It is highly recommended that all fuel cells be equipped with foam. Fuel
cell will be required to be mounted to the frame of the car. Fuel cell will be
required to be secured with straps or tubing around it. Fuel cell cannot hang
below the bottom of the rear end tubes with the car setting at race height. All
cars will be required to be equipped with a fuel cell guard that is mounted
separately from the fuel cell and comes to the bottom of the fuel cell. Minimum
1 ½ " tubing must be used for fuel guard.
FIREWALLS: Rear firewall must separate driver's compartment from rear
wheels and fuel cell. Front firewall must be solid, with all holes covered.
TOW HOOKS: All cars must have a tow hook on the front and rear
minimum 3/8” cable. Rule Will Be Enforced.
DRIVESHAFT: An approved driveshaft safety loop must be used at a
point 6" back from the front universal joint. Minimum requirement 1/4" x 2".
Drive shaft must be painted white. No carbon fiber driveshafts.
APPEARANCE: Paint all cars neatly and brightly. Bright and light colors
are recommended. Numbers will be assigned; they must be painted neatly on both
sides and roof of car. Numbering must be done using minimum 24" tall with
3"width numbers. Numbers must also appear on rear filler panel. Must have
minimum 6" tall number visible from the front.
EXHAUST/MUFFLER: Collector type headers are mandatory, and will be
required to exit under the car and extend rearward to a point behind the
bellhousing. Headers must exit under the car and parallel to the ground or may
exit left side of car. All competing models will be required to use mufflers to
meet a maximum noise level of 98 DBA at 100 feet.
"THE RULES AND/OR REGULATIONS
SET FOURTH HEREIN ARE DESIGNED TO PROVIDE FOR THE ORDERLY CONDUCT OF RACING
EVENTS AND TO ESTABLISH MINIMUM ACCEPTABLE REQUIREMENTS FOR SUCH EVENTS. THESE
RULES SHALL GOVERN THE CONDITION OF ALL RACING EVENTS. AND, BY PARTICIPATING IN
THESE EVENTS, ALL RACING MEMBERS ARE DEEMED TO HAVE COMPLIED WITH THESE RULES.
NO EXPRESSED OR IMPLIED WARRANTY OR SAFETY SHALL RESULT FROM PUBLICATION 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 PARTICIPANTS, SPECTATORS, OR OTHERS".
Pro Stock Rules and Car Specs.doc Microsoft Word Document