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Williams Grove Speedway 2012 Street Stock Rules & Regulations

 

***Please note changes for the 2012 season will be in BLUE BOLD

 

PDF file to print or save >> click here


updated 2/1/12

North American made passenger cars from 1950 with a wheelbase of no less than 108 inches originally. Wheel base must remain stock except cars with a wheel base of more than 108 inches may be shortened to 108 inches with approval of speedway tech personnel on a case by case basis. No Jeeps, trucks, sports cars, convertibles or station wagons.



1. Body and frame must be same make, model and year. Interchanging permitted within “sister” cars only – i.e. Chevelle, Grand Prix and Monte Carlo; Camaro and Firebird etc. Prior approval for any interchanging of frame and body must obtained from a track technical official. Body must be stock in stock location on frame. Stock firewall mounts and stock body mounts may be removed but the firewall on the left side must be no more than 20” from the left front weight jacker and the firewall on the right side must be no more than 29” from the right front weight jacker. No chopping, channeling or modifying. All roof pillars must be stock in shape but can be outer skins only with support being provided by the roll cage (car must appear “stock). All glass, lights, trim and other objects that may come loose should be removed. Windshield permitted. No side skirts. Body panels must be bolted, not Dzus buttoned. Rocker panels can be fabricated but must be steel and remain stock appearing.

 

2. Must be complete steel body or stock-appearing body. All body panels must be steel. If using stock-appearing body, all lines and bends must match OEM body.


3. Must have front and rear firewall. Full firewalls must be present between driver and engine compartment and driver and fuel cell. Aftermarket floor pans and firewalls must be constructed of steel no thinner than 20-gauge.

4.
All cars must have a stock type front bumper. Rear bumper may be tubular. Stock front bumper cover may be replaced with an aftermarket stock-appearing bumper cover of same manufacturer and comparable model; variations must be approved. Non-visible reinforcing pipe may be used behind bumper, but it must be securely fastened to the frame. A rear bumper cover must be present at the start of any event.  A bar may be used to protect the radiator as follows. A 3-piece design using a 1-1/4 inch pipe may be constructed which is no wider than the frame rails and no higher than 10 inches off the frame rails. A maximum of two bars may be attached to the top of the bumper from the protective hoop. Rear bracing of hoop is optional. Do not build a battering ram. Wrecker hook up point must be included. If bumper becomes loose or falls off during an event, car will be disqualified.

 

5. If rub rails are used, they must be a single rail design and be attached flush with the body contours. Skid rails must be tight to the body except a kick out of skid rail permitted 18 inches in front of rear tire but may not extend past tread of any tire at any time.


6
. No sharp edges inside or outside of the cars, this includes bumpers.

 

7. All doors must be welded or bolted shut.

 


INTERIOR

1. Seats and upholstery must be removed and a racing seat properly installed and firmly anchored. Driver's seat may be no farther back than 60 inches measured from the vertical section of the firewall to the back of the seat cushion area.


2. Fuel tank must be replaced with a fuel cell which must be encased in an approved material and be secured with a minimum of two steel straps two inches wide.

 

3. Floor of trunk must be removed.

4. Battery to be securely fastened. If battery is located in driver's compartment it must be covered to prevent leakage in case of a crash.


5. Roll bars must be a four-post design boxed frame, well braced, using at least 1-1/2 inch OD pipe or tubing with a wall thickness of .095 minimum. The bars must be welded to the top of the frame and extend at least four inches above the driver's head. Driver's side must have a minimum of four protective side bars, three bars on the opposite side of the cage. Two bars must run from the top of the cage to the rear frame section. No threaded pipe or pipe fittings in cage. Roll cage kits permitted.

 

6. All roll cage seams and joints must be fully welded.

 

7. The tunnel beside the driver’s seat and above the transmission and driveline cannot be more than 10 inches higher than the floor pan, must be bent at 90 degrees and extend to the right door area.

 

8. Interior may be aluminum and may be boxed-in behind driver’s seat but must extend down to “X”-brace crossbar.

 

9. A steel driveline hoop is mandatory.

 

10. Area of floor under driver’s feet must be reinforced with at least 1/8-inch plate, steel or aluminum.

 

 

FRAME AND SUSPENSION -

1. Frame must be the same make, model and year as body used with interchanging allowed only as discussed in “Eligible Models” section. No aftermarket kit frames permitted. No down-tube frames. Body and frame must match rear suspension type – coil-spring bodies on coil-spring frames, leaf-spring bodies on leaf-spring frames and torsion bar bodies on torsion bar frames only.

 

2. Cars of uni-body construction must use a frame of eight inches in circumference (2”x2” box tubing) to tie front and rear frame rails together. Eight-inch circumference tubing is a minimum requirement.

 

3. All frames may be reinforced with round steel tubing to the front fire wall and to the rear fire wall but all frame components must remain in stock position.

 

4. No part of chassis may be moved or relocated from its original position except where noted.

5. Rear sub-frame may be fabricated from tubing duplicating length and location of factory rail – diagrams of Chevelle/Monte Carlo and Camaro/Firebird frames follow (other frame types will be added as needed). Rusted areas may be reinforced with a steel channel iron or tubing.

 

6. Spring part of suspension must remain stock and be mounted in stock position on stock fixtures. Rusted areas of stock fixtures may be replaced with other material but must remain in stock position. No straight front axles.

 

7. Stock appearing rears and stock appearing Ford 9-inch rears permitted. No Grand National or floater rears permitted. Rear must be locked. Must be mounted in stock position on stock fixtures. No offsetting. Interchanging of rears permitted within manufacturers line, integral type for integral type or non-integral for non-integral. Any steel spool, replacement axles and C-clip eliminators permitted. Minor modification to length of stock rear control arm permitted but must remain stock.

 

8. Stock spindles made by manufacturer of car being used only. No interchanging. No NASCAR type spindles. Front upper control arm may be a tubular aftermarket non-adjustable arm mounted on stock mounts.

 

9. Engine set-back is not permitted. The #1 cylinder spark plug on Chevrolet small-block V8s must be at least 1” forward of the left upper ball joint or weight jacker. Steering quickeners are permitted.

 

10. No double shocking. Racing shocks permitted, front and rear shock location optional. If stock spring pockets are rusted or damaged, they may be remanufactured but must closely resemble stock and remain in original stock position. Shock mounts may be relocated. Weight jacks permitted.


11. Steel wheels only, 12-inch maximum width. Racing wheels recommended. If stock wheels are used, wheels must be reinforced with a 1/4-inch steel center plate. Reverse racing rim permitted and beadlocks are permitted on any wheel. No wheel covers of any kind. Foam mud plugs are permitted.


12. Four wheel brakes must be in good working order at all times. Rear disc brakes are optional. Aftermarket master cylinder permitted. Master cylinder may be moved to inside driver's compartment on inside of firewall. In-line proportioning valves permitted. No plastic brake lines.


13. FoMoCo chassis cars {T-Birds and Cougars) from 1983 thru 1988 with a 104 inch wheel base may be stretched to meet the 108 inch wheel base rule by adding a section to the floor pan. The body would be made to fit the chassis in a similar manner.

 

14. No McPherson strut suspensions are permitted.



 

ENGINES

1. Production V-8 engines limited to 366 cubic inches and must be in chassis originally cataloged by manufacturer. Block must be a standard production cast iron block that was less than 366 cubic inches originally. No aluminum blocks. Stroke to remain stock. Crankshaft must be factory production or stock dimension aftermarket steel or cast iron crank with stock stroke. No swapping of cranks. Crank may be turned to a maximum of .040 under. Chevrolet Bowtie and Ford SVO blocks permitted. Ford engines must use a cast iron or forged steel Ford production crankshaft having the stock stroke of a 351 Windsor engine and weighing at least 46 pounds. MOPAR high performance crank with part number P4120312 permitted. Minimum crankshaft weight is 46 pounds.

 

2. Connecting rods must be production items from a V8 engine less than 365 cubic inches. Any stock dimension steel rod (no titanium) may be substituted. Modification to rod length prohibited. Rods, block and crank to be used in the same combination that the factory originally manufactured. Ford permitted to use 6 inch length rod with approved SVO crank.


3. Flat top pistons only, zero deck (piston may not travel above block deck).

 

4. Cylinder head options:

Option I - Any factory steel head or bowtie head having a 60cc minimum combustion chamber. No aluminum heads. No relocating of rocker arm studs.


Option II - Vortec and DART/World Products Sportsman II steel head with casting number of 1037 permitted as follows: Must have a 60cc minimum combustion chamber. No relocating rocker arm studs. No porting or polishing except for matching ports in intake port of head only. Depth maximum for matching port is 3/4 of an inch. Lifter bore must remain stock. The valve seat area can be cleaned up using a maximum 80-degree grinding stone. No additional hand or machine work permitted. CC measurement of intake runner of head to remain stock with the exception of matching port.


Option III - Vortec heads permitted with approved casting numbers of: Small port #25534351 and Large port #25534445 (supersedes #25534371). RHS ProAction cylinder heads permitted for Ford engines with approved part numbers #35301, #35302, #35303.


5. Production valve or production replacement valve using steel or stainless steel only. Any spring and retainer permitted. Roller rockers permitted. No roller cams. No dry sump systems.


6. All factory identification numbers and or part numbers must remain on crankshaft and heads. Main bearing caps must be iron or steel.

7. Limited to one two-barrel carburetor that was originally manufactured as a two barrel carburetor for original equipment use, i.e. Carter, Holley, Rochester, etc. No Predators, Dominators or custom-made carburetors.

 

8. Any approved aluminum intake other than a Smoke Ram or Tunnel Ram. Intake height to be a maximum of 8 inches measured from the top of the carburetor bowl using a straight edge from the bowl to the #3 or #4 runner of the intake manifold.

 

9. Headers permitted; may be inside-the-rail, over-the-rail or 180-degree with collector and extend to or beyond firewall. “Tri-Y” style not permitted.

10. Starter must be in working condition at all times. Battery ignition only. Stock distributor with aftermarket components permitted, no modification to housing. No MSD ignition. Ford may use the Ford ignition box.


11. Gasoline only; no additives of any kind. No electric fuel pumps or pressurized fuel systems.


12. Stock clutch or stock appearing aftermarket clutch of stock diameter only. No aluminum flywheels or pressure plate. No mufti-disc clutch or racing clutch. Must use a stamped steel blow proof bell housing with a 2x3-inch inspection hole located three inches from the transmission mounting surface for clutch inspection.


13. Stock manual transmission or stock automatic transmission only with a working reverse. Automatics must use a working stock appearing torque converter.

 

14. Protest fee as per general rules. Any car disqualified receives no payoff for that event.


 

TIRES

Only an 11-inch Hoosier brand tire (either Hoosier Economy or Hoosier Spec) is permitted for competition. The largest tire permitted is the Hoosier Economy 11 inch tire measuring 16.75 inches from sidewall to sidewall with a 93 inch circumference. The tires must be a 1300/D-15 or harder compound.



 

GENERAL RULES

1. All drivers must use a Raceceiver radio.  Failure to have a working radio can result in disqualification.

 

2. Quick release safety belt and shoulder harness must be installed.

 

3.  Roll bars to be padded in driver's area.  Full windshield screen for driver protection strongly recommended.

 

4.  Drivers are responsible for wearing an approved racing helmet and an approved fire retardant driver's uniform and gloves.

 

5.  A window net or arm restraints to be used. 

 

6. Cars must weight at least 3,000 pounds including driver after any event.

 

7.  All weights to be securely fastened and painted white with car number painted on weight.  Must be 1/2 inch or larger bolt to fasten weight and weight must be securely fastened.  No weight added above the deck.

 

8.  All driveshafts to be painted white.

 

9.  All cars must be presentable to the public at all times and must be clearly identified with numbers 18 inches high.  No duplicate numbers.

 

10.  All electronic control devices are illegal, including traction control systems.  Penalty for first offense shall be forfeiture of points and money won that day, a two-race suspension and a $500 fine that must be paid prior to the car being entered in another race at Williams Grove Speedway.  A second offense will have a penalty of the forfeiture of ALL points for that season, money won that day, a five-race suspension and a $1,000 fine.  Penalties for any subsequent offenses will be determined by track management.

 

 

 

Cars from other speedways are welcome to compete at Williams Grove Speedway but are expected to comply with all Williams Grove engine, tire and weight rules. A one-race grace period will be allowed for compliance with all other rules.

 


 

NO DUPLICATE NUMBERS. THE ABOVE RULES ARE INTENDED TO BE A GUIDELINE IN CONSTRUCTING A CAR. THE DECISION OF TRACK OFFICIALS IS FINAL.

CALL BEFORE YOU BUY OR BUILD.
Williams Grove Speedway 717-697-5000

 















OFFICE HOURS
Tues. thru Thurs. 9AM - 4PM
Fri. 11AM to end of race*
Sat. 2PM to end of race
*
*
= providing we race


CONTACT
Williams Grove Speedway
1 Speedway Drive
Mechanicsburg, PA 17055

Phone:  717-697-5000
Fax: 717-795-7216

Email:
williamsgrove@verizon.net











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