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HOME MESSAGE BOARD RACE DAY PHOTOS SCHEDULE RESULTS DIRECTIONS SEATING ACCOMMODATIONS
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Williams Grove Speedway 2010
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RULE BOOK DISCLAIMER The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events, and, by participating in these events, all participants are deemed to have complied with these rules. NO EXPRESS OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATION 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.
The race director shall be empowered to permit minor deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.
CHASSIS SPECIFICATIONS 1. Roll bars must be 1-1/4 inch steel pipe or 1-3/8 inch OD chrome moly tubing or larger and be permanently welded to the top of the frame. Rear roll bar and frame must be a minimum of 30 inches outside diameter where welded to the frame and at shoulder height. Frame rails from front to back must be tapered and not bent. Tubing must have a wall thickness not less than .090. Rear roll bar recommended to be .120. No bolting of cage or side extensions to support roll cage. All roll bars must be padded around driver. No spot welding. a. Frame rails must be
2x4 inch rectangular tubing with a wall thickness not less than .0835 of
an inch. Box frame must tie into rear roll cage and extend from rear of
cage towards the front of the engine and be a minimum of 58 inches in
length at the shortest point. b. Hood and body panels are required and must
meet the approval of the technical committee. Body style to conform to
generally accepted sprint car standards. Top wing to have a 16 square
foot maximum size. No bi-wings. Side panels must be straight with no
contours and be a maximum of 30 inches wide with a ¼ inch tolerance and
70 inches long with a one inch tolerance. Wing may not be adjustable in
any way while car is in competition. Lower front corners of side panels
may not impair driver's vision. Side panels may not extend more than
3-1/2 inches in front or rear of wing core. No more than 2 inches of
reinforcing bends on top and bottom of side panels. Kick outs no longer
than 2 inches may be used on back of side panel. Side panel must cover
wing core. A wicker bill no higher than 2 inches may be used on rear of
wing core, this is in a addition to the 16 square feet. Wing may not
extend beyond outside edge of rear tires. Single plane wings only. Top
wing may not be more than 14 inches off of roll cage with a one inch
tolerance. Penalty to be to put car to the rear of the finishing order.
Wing must meet the approval of the technical committee. No rudders on
body of wing. c. No front wings. Sides of hood may be no
higher than 2 inches. Side wings or corn pickers may not extend past the
front of the firewall and be no higher than the rear tire with no side
extensions. No other wings, hood extensions, tail wings or wedge shaped
body or tail parts permitted. d. Fuel cell with bladder mandatory and should
have an approved, safe vent. Do not attach cell to frame by bolting or
fastening to plates on bladder. e. No driver adjustable shocks.
f. Total weight of car
and driver may not be less than 1775 pounds. There will be a 25 pound
weight allowance. Weigh in to be after any event, weight will be
measured and car will be teched as car comes off the track in the
condition that it took the checkered flag with driver in car. No bolt on
weight, must be securely and permanently fastened. Weight measured by
speedway scales. 2. Engines may be no farther back than the
center of the wheelbase. 3. Open drive shafts must have a sling to
protect the driver and a steel plate on the bottom of the seat at least
1/8 inch thick. 4. Quick change rears optional with steel axle
or Winters aluminum spec rear axle. Sprint Car aluminum rear axles
optional with a maximum tube opening of 1.90 inches. Knock offs
optional. Must use solid wheel adapter on right rear. 5. Front bumper must be of frame width and
axle level. Rear bumper must meet the approval of the technical
committee. Bumpers must be bolted or equivalent, no rivets. 6. All cars must be equipped with an approved
type of quick release safety belt, shoulder harness and anti-sub belt.
All safety belts must be anchored to the frame. Shoulder harness must be
fastened to the bracing bars and loop over a bar at shoulder height.
7. Good brakes required. Right front brake optional, left front must have a rotor with a minimum of a single caliper. Rear brakes optional as follows: Rear of car must have steel rotors and a dual brake caliper on both rear wheels. Inboard brake optional, must be vented steel rotor minimum thickness of .725 of an inch with dual brake caliper, right rear caliper optional. If inboard brake used, rotor must be clear of battery when rear axle is pushed front against frame upright and aluminum rotor on right rear optional. Guard between rotor and fuel cell recommended. 8. The steering must be
safe and meet approval of technical committee. No power steering. Knee
protection mandatory, aluminum wrap around style with padding
recommended. Steel rod ends required on drag link. Tether recommended. 9. Approved floor from cowl past the driver
and a tight firewall required. 10. The wheelbase may not be less than 90
inches on the left side. 11. Maximum wheel width of 18 inches excluding bead lock. Steel and/or aluminum wheels permitted. No plastic or carbon fiber wheels. 12. Weight jacks permitted. 13. Driver's head rest and throttle return are
mandatory. 14. All cars must have rub rails no wider than
the outside of the wheels and must be constructed in such a manner that
no wheels can get locked with those of another car. Rub rails must be
bolted or equivalent, no rivets. 15. All cars must have a fuel shut off valve
on the right side of the driver's seat or the right side of dash. 16. Drivers should wear fire retardant drivers
uniforms and gloves plus arm restraints at all times when they are in
the car on the track. High back seats recommended. 17. If transponders are used, they must be mounted at a designated position. Team owned transponders mandatory in 2011. Transponder to be used is the rechargeable AMB Trannx 260.
ALL ENGINES UP TO 320 CUBIC INCHES 1. Engines limited to 320 cubic inches. 2. No aluminum engine block or heads. Main bearing caps must be iron or steel
4. Any piston, any valve, any steel crank, any
steel rod. 5. Factory high performance parts approved.
This applies to block and heads. 6. DART II Sportsman head permitted, must be
unported and meet specs outlined in rule number six for engines over 320
cubic inches below. 7. 320 engines must use 358 head rule or weigh 1800 pounds.
ENGINES OVER 320 CUBIC INCHES 1. Engines limited to 358 cubic inches. 2. Block must be a standard production block
or approved stock dimension after market block that was under 358 cubic
inches originally. No aluminum blocks. Chevy bow-tie block and Ford SVO
blocks permitted. 3. Crankshafts must be factory production or stock dimension after market cast iron or steel crank Stroke must remain stock. Crank may be turned a maximum of .040 under. Chevy stroke of 3.480, Ford stroke of 3.50 and MOPAR stroke of 3.31 or 3.45. No swapping of cranks. Ford SVO crank with part number M6303-H351 permitted. MOPAR high performance crank with part number P4120312 permitted. All cranks must be a minimum of 46 pounds in weight. Penalty for using a light weight crank to be suspension for season in addition to penalties outlined in general rules. 4. RODS - A production rod
from a V-8 engine under 358 cubic inches. Modification of rod length
prohibited. Rods, block and crank to be used in the same combination
that factory originally manufactured. Any stock dimension steel rod (No
titanium) may be substituted. Stock dimension includes length, wrist pin
location and journal size. Approved after market rod must be in factory
condition, no polishing or reworking. No addition or removal of metal
other than normal balancing. All 358 engines must have a 3/4 inch
inspection hole in the left side of the oil pan opposite the number one
rod journal Any windage tray which would block the view of the rod must
be removed. Ford permitted to use a 6 inch length rod with SVO crank. 5. Flat top pistons
only. Zero deck, piston may not be above the deck of the block. 6. Any factory steel head, or DART/ World
Products Sportsman II steel head. DART/World Products head must have
casting number of 1037. Must have a 60 cc minimum combustion chamber, no
grinding in chamber. No aluminum heads. No relocating rocker arm studs.
No porting or polishing. Matching ports in the intake port of head only.
Depth maximum for matching ports 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. Vortec heads permitted with approved casting numbers
of: Small port #25534351 and Large port #25534371. RHS ProAction
cylinder heads permitted for Ford engines with approved part numbers
#35301, #35302, #35303. 7. Production valve or
production replacement, steel or stainless steel only. Any spring, any
retainer permitted. Roller rockers permitted. Stock valve guide angle.
No relocating valve 8. Flat tappet cams only. No mushroom or roller cams. 9. Block must be cast iron. All factory identification numbers and/or part numbers must remain on crank and heads. Main bearing cap must be iron or steel.
GENERAL SPECIFICATIONS 1. Maximum of four barrels of carburetion. Single carburetor only. No super chargers, fuel injection or turbo chargers. 2. Any approved 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. 3. Balance assemblies
optional 4. All cars must be self starting for the
feature, clutch optional. No automatic transmission. Stock configuration
clutch must have a full scatter shield of at least 1/4 inch thick steel
or an approved bell housing. Failure to do so will result in an
automatic suspension and loss of points. 5. Fuel - Methanol only according to Federal
Standards of Purity, Grade A or AA. No additives of any kind including
top lube. 6. No electric fuel pumps or pressurized fuel
systems. No inboard (in driver's compartment) fuel pumps. 7. Gear drive units permitted. No externally
adjustable cam timing device. 8. Any battery ignition. No magneto. No computer operated or controlled parts. No traction control devices. Gel filled battery recommended. 9. No needle bearing cam, crank or rod bearings permitted. 10. Tires – Two types of right rear tires may
be used. One, a American Racer 34.0/17.0-15GT track tire with the
distinguishing MC on the sidewall. The MC being the prefix to the
compound. The MC-2 or MC-3 compound permitted. The second option is a
Hoosier 105/18-15 plated (HTMA) spec tire. The D-12 or D-15 compounds
are permitted. 11. All cars must be
registered to prevent duplicate car numbers. Please call the speedway
office to register your car number. 12. All cars are subject to inspection and
tear down at any time. 13. Any car using an engine block and/or cylinder heads that are visibly cut, ground or machined externally for the purpose of weight reduction must add 25 pounds to the car from the center line of the engine forward. Weight must be securely fastened but must be able to be removed to verify weight.
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.
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Williams Grove Speedway, 1 Speedway Drive, Mechanicsburg, PA 17055 717-697-5000
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