OLD DOMINION SPEEDWAY 
PURE STOCK RULES AND REGULATIONS
2011 RULES AND REGULATIONS 
Version ODSPS2011.A Effective 4/10/11

1.          COMPETING MODELS

a.        Only AMERICAN made stock production 6 or 8 cylinder vehicles allowed.  Either 2-door or 4-door models are permitted.  T-tops are permitted if the entire roof  area is covered with sheet metal and painted.  Racecars, trucks, vans, convertibles, sub-compacts, 4-wheel drive or station wagons are not allowed.

b.       Cars that previously competed at any racetrack in any non-Enduro type division are          not allowed to compete in ODS Pure Stock races.

c.        Body, engine, transmission and parts must be stock for year, make and model of car except as noted within the 2011 rules.  Year, make and model will be declared on the first race the car is run and cannot be changed without approval of track officials.  No truck, bus, marine or tractor parts permitted except as noted in the 2011 rules.  All parts must be approved by track officials.

d.       All drivers must declare year, make and model of car the first time the car is raced,  The declaration cannot change unless the driver brings another car to the track.

2.          BODIES

a.        Reinforcements to the body are not allowed.  This includes bumpers and the area around the radiator.  Reinforced cars will be disqualified.  Stock bumper may be enclosed in aftermarket plastic nose supported with no more than ¼ inch tubing.  No reinforcements permitted.

b.       A 4-point roll cage with three driver’s side door bars is mandatory.  Roll cages must not extend outside of the driver’s compartment so as to be used as reinforcement.  No rear bars permitted.

c.        All window glass must be removed, except for the windshield.  The windshield may be replaced with Plexiglas; however, the entire windshield opening must be covered.  All other glass, such as headlights and lenses, must be removed.

d.       All flammable material, except the seat and dash must be removed from the interior.  This includes the headliner, carpet, door panels, etc.

e.        Doors must be securely welded, bolted or chained shut.

f.         Fender wells may be cut for tire clearance; however, body must remain neat and clean in appearance.  Other cutting of bodies is not allowed.

g.        Plastic grilles must be removed and can be replaced with wire mesh.

h.        Hood and trunk hinges must remain factory standard.  Latching devices must be removed and quick release pins only are to be installed.   The hood or trunk lid cannot be bolted or chained shut.

i.          All holes in the rear seat area must be covered with minimum 20-gauge steel to seal off the trunk area from the driver’s compartment.

j.         Flags, fins, antennas, etc. are not allowed.

k.       Exterior side-view mirrors are not allowed.  The inside rear view mirror cannot extend outside of the car.

l.          External lights, such as brake lights or back-up lights are not allowed.

3.         SUSPENSION & REAR END

a.        Changes/alterations to suspension or rear end are not allowed.  Springs, sway bars and all other suspension parts must remain standard.

b.       Rear end may lock.  Posi-traction permitted.

c.        Springs must be factory stock and/or standard replacement springs for the make and model car.   Truck, racing or altered springs are not allowed.  Rubber spacers are not allowed.

d.       Minimum frame to ground clearance is seven (7) inches.

e.        Reinforcements or suspension welding is not allowed.  Violators will be disqualified.

4.          ENGINE & TRANSMISSION

a.        Engine modifications are not allowed except as noted herein.  Maximum      displacement: 350 ci + .060 overbore for GM and Dodge products.  351 ci + .060 overbore for Ford products.  Stock rods only permitted.

b.       High performance parts of any kind are not allowed.  Parts must be approved by track officials.

c.        Camshafts must be stock for the make/model of motor.

d.       Intake manifold must have an accessible vacuum port plug to enable technical inspection of vacuum.   Range of allowable vacuum to be 18 or more inches at 850 rpm.

e.        All vehicles must use a two-barrel automotive type Rochester carburetor. Booster in Rochester carburetor must measure a maximum of .249 in center hole of booster (Tech gauge measures .259 to allow for tolerance.  If gauge slides through booster, it will be declared illegal).   Height of booster must be a minimum of .746 (Tech gauge measures .736 to allow for tolerance.  If gauge slides over booster, it will be declared illegal).  Rochester carburetor must run with cast iron intakes, only.

f.         Headers are not allowed.  Mufflers and tailpipes may be used but are not required.

g.        Stock OEM heads only.  GM to GM, Ford to Ford.  No aluminum heads.   No performance heads.  Motor mounts must be stock and in stock location.  No Vortec, World Products, double hump, Canadian or aftermarket heads permitted.  No center valve cover bolts permitted.  Heads must be approved by track officials.

h.        Battery may be located in the driver’s compartment with master cut-off switch located near the center of the dash.  Battery must be completely enclosed within a steel box with a maximum thickness of 1/8” and a minimum thickness of 1/16”.  The lid must bolt shut and the box must be bolted securely to the floor.  The battery must be sufficiently blocked to prevent excess movement within the box.  The box must be insulated at the point of the battery posts to prevent arcing.

i.          Stock automatic or standard shift transmissions are permitted.  Powerglides are permitted and must run stock converter and stock input shaft.  Forward and reverse must work.  Alterations or modifications are not allowed.  Must have a working neutral safety switch.  May use transmission cooler.  Maximum 11 inch stock converter.  One “U” shaped steel strap, 2 inches wide and ¼” thick must surround drive shaft and be fastened to the floor cross-member.  Drive shaft must be magnetic steel and painted white.

j.         Antifreeze or additives of any kind are not allowed in the radiator.  Only plain water may be used.

k.       Aluminum radiators permitted.

5.          FUEL CELL & FUEL

a.        A fuel cell is mandatory and must be located in the trunk.  The fuel cell must be positioned as far forward and as centered as possible.   Four (4) solid steel straps must be used to secure the fuel cell to the trunk floor.  The original gas tank must be removed.  Any openings left from removing the original gas tank must be closed with minimum 20-gauge steel.  Any car with a leaking fuel cell will not be allowed to compete.

b.       The filler neck must be completely inside the trunk.  The filler neck must be equipped with a proper cap – rags, tape, etc. are not allowed.

c.        Racing fuel permitted.  Additives such as alcohol, propylene and methanol are not allowed.

6.          TIRES & WHEELS

a.        225 x 70 or 235 x 70 tires only.  All tires on the car must be the same size, height and width.  All tires must be DOT approved for street use only and able to pass state inspection.  Race tires such as Hoosier or Comanche are not allowed.

b.       New and used tires only are permitted.  RECAP tires are not allowed.  Bleeder valves are not allowed.

Administration

19.1 All competitors should read/review sections 1 thru 17 of the NASCAR 2011 Rule Book.

19.2 All competitors should read/review ODS General Rules and ODS ALL Division Rules. 19.3 Any questions concerning these rules should be directed to a member of the ODS technical crew.

Less Steger, Eric Stewart, Dickie Gore, Gary Gore, Hayne Dominick, Dave Menefee

19.4 Old Dominion Speedway welcomes all of its competitors to an exciting new racing season. Well wishes are extended for a safe, professional and successful racing season.