Rule Book Disclaimer
The Ohio Valley Sprint Car Association is a competitive sanctioned Sprint Car Racing series, which is intended to be conducted and officiated in accordance with the rules. These rules provide the guideline for all sanction events. Participants agree to comply with and understand they are not intended to imply the warranty of safety as a result of publication or compliance of the rules and regulations stated herein. The rule book may be amended from time-to-time and special rules may be published and/or adjusted at any particular event with the participants receiving prior notification. The rules are intended to offer a guideline for the conduct and officiating of an event.
The rules and guidelines enforced by the OVSCA are primarily consistent with the All Star Circuit of Champions and World of Outlaw Series. However, some race procedure and point system details vary.
Point System Policy
- Full points are awarded at each OVSCA sanctioned event, regardless of overall purse.
- Show-up points are awarded when cars are on the track, or when motors are fired.
- Tiebreaker for end of season points will be determined by number of feature wins, 2nd place finishes, etc.
CAR AND DRIVER SPECIFICATIONS
- Only small block V-8 engines with the cam in the block and maximum of 410.00 cubic inches of displacement (tolerance +/- 0.000) will be permitted. The formula 6.2932 x bore2 x stroke will apply. Big block engines will not be permitted.
- The engine must be mounted in-line with the driver and the drive-line must pass beneath the driver on center through the driver compartment. Offset engines and/or offsetting the position of the engine will not be permitted. The engine block and cylinders must be machined from cast aluminum. Billet machined blocks and/or cylinder heads will not be permitted.
- Only normally aspirated engines will be permitted. Turbo chargers, super chargers and/or forced induction of any type and/or description will not be permitted.
- The maximum engine cylinder bore size shall be 4.165.
- All engine cylinder sleeves (inserts) must be machined from an iron and/or steel alloy.
- Titanium crankshafts, connecting rods and/or rod caps will not be permitted.
- Only two (2) valves and one (1) spark plug will be permitted per cylinder.
o Cylinder heads must retain a traditional valve pattern. Rotation of the valves will not be permitted. Cantered or splayed valve cylinder heads must be approved prior to introduction into competition.
- Only steel connecting rods with a maximum length of 6.000 inches will be permitted.
- All oil pans must have an inspection plug. The inspection plug must be a #12AN fitting or 1.00” pipe plug. In the event that an engine does not have an inspection plug, the oil pan must be removed for inspection prior to competition.
- Only throttle plate (butterfly) and small throttle body styles with round circular bores will be permitted. The maximum throttle bore as measured at the throttle plate (butterfly) may not exceed 3.000 inches in diameter. Slide plate, rotary cylinder, and/or other styles must be approved prior to competition.
- Only 16 fuel nozzles, utilizing two (2) per cylinder will be permitted. One (1) nozzle must be placed in the cylinder head and one (1) nozzle must be placed in the injector.
- A minimum of two (2) throttle return springs must be used to mechanically return the throttle to a fully closed position.
- Only magneto-type ignitions will be permitted. A single crank-trigger type system will be permitted as backup ignition system. One (1) switch that alternates the current between the magneto and the crank trigger may be mounted to the dashboard within the driver’s reach. Multiple coil-pack ignitions will not be permitted.
- Steel and stainless steel headers will be permitted. Titanium headers will not be permitted.
- Traction control devices are strictly prohibited. Series and track officials may confiscate any item suspected to be related to traction control, at any sanctioned event based on their discretion.
o Penalty for having traction control will be loss of money and points for the night, plus one (1) year suspension for the owner/driver from the series to begin from the date of the suspension.
o Penalty will also result in the loss of year-to-date points for owner/driver.
- Methanol Only
o No additives. Fuel bladders are mandatory.
- Right Rear Tire: Hoosier H15 OR HRD15 Compounds
- Left Rear Tire: Hoosier H12 Left Rear
- Front Tires: Hoosier Open Compound
o Left Rear and Front Tires will have a burn off period of four (4) Race Weeks. Until then, any Hoosier Compound will be allowed.
- Tire Softening: Softening of any tire compounds by soaking in a chemical bath or by any other means is strictly prohibited.
- Must be completely enclosed. Drive line hoop or strap is mandatory. Has to be on center line of chassis. Hoop should be steel and welded or bolted in.
- Minimum tubing size and thickness. The following are subject to inspection:
o TOP RAILS must be a minimum of 1 1/2“diameter x 0.095 thickness.
o TOP RAILS must be a minimum of 1 3/8 “ diameter x 0.095 thickness or 1 1/2 “ diameter x 0.083 thickness.
o ROLL CAGE UPRIGHTS must be a minimum of 1 3/8” diameter x 0.083 thickness.
o ROLL CAGE TOP CROSS MEMBERS must be a minimum of 1 1/2 “diameter x 0.095 thickness.
o UPPER RAILS must be a minimum of 1 3/8” diameter x 0.083 thickness.
o REAR END SAFETY BAR is a mandatory piece. Must be a minimum of 1” diameter x 0.083 thickness.
o BRACE must be a minimum of 1 1/4 “ diameter x 0.063 thickness
- Must be steel or stainless steel only. Minimum 1” diameter, minimum of 0.065 thickness. Nerf bars are mandatory and must be steel or stainless steel only.
- Must be steel only. Minimum sizes 2” x 0.156 or 2 1/4” x 0.120 or 2 3/8” x 0.095 or 2 1/2” x 0.095.
Top Wing Center Foil
- Center foil maximum size of 25 square feet with a maximum width and length or 60 inches. Center Foil must be square or rectangular in shape with all four corners set at 90o angles with no variance allowed. Center foil top may be flat from front to back and side to side or concave through the center.
- Center Foil shall be fully sheathed in aluminum. Vent holes, dimples, ridges and/or any other type of fabricated modification will not be permitted anywhere on the wing.
- A maximum of 1” removable wicker bill may be mounted on the rear edge of the flat center foil. Wicker bill must be 90 degrees to the top of the center foil. Built-in wicker bills or gurney lips will not be permitted. Wicker bills will not be permitted with curved or concave wings.
- The top wing may be adjustable in the cockpit by the driver. Other than the slider mechanism, moving parts will not be permitted on or in the foil structure. Only one slider mechanism will be permitted on the top wing, which only permits forward and backward adjustment.
- The maximum center foil thickness is 9 inches. Underneath side of center foil must appear to be a continuous smooth arc with no recesses, concaves, or protrusions. Center foil must be one-piece construction. Split or bi-wings will not be permitted. Only wings fabricated of metal alloys will be permitted. Fiberglass, carbon fiber and/or other similar material(s) will not be permitted in the basic framework of the wings. The top wing must not extend beyond outside of rear tires.
- Foils or rudders will not be permitted anywhere on the top wing.
Front Wing Center Foil
- The center foil will have a maximum size of 6 square feet with a maximum width of 36 inches and a maximum length of 24 inches. The center foil must be square or rectangular in shape with all four corners set at 90 degree angles.
- Center foil shall be fully sheathed in aluminum. Vent holes, dimples, ridges and/or any other type of fabricated modification will not be permitted anywhere on the wing.
- A maximum of 1” removable wicker bill may be mounted on the rear edge of the center foil. The wicker bill must be 90 degrees to the top of the center foil. Built-in wicker bills or gurney lips will not be permitted.
- The maximum distance from the Center Foil front edge to the front edge of the front axle may not exceed 20 inches. The center foil front edge must remain at least 1 inch behind the front edge of the front bumper. The center foil top surface from side to side must remain flat. The center foil must be one piece. Split or bi-wings will not be permitted. Only wings fabricated of metal alloys will be permitted. Fiberglass, carbon fiber or other similar material(s) will not be permitted in the basic framework of the wings.
- The front wing must not extend beyond the outside of front tires. The front wing may not be cockpit or driver adjustable while the car is stationary and/or in motion. Moving parts will not be permitted on or in the foil structure. Rudders or fins will not be permitted.
- The 5” section located at the rear of the front foil must not have a belly/curl that is out of proportion with the rest of the front foil. As measured on a 5” straight edge, the belly at 2×2 inches from the rear of the foil may not be deeper than 3/8 inch specification, assuring the belly arc is gradual. The belly/curl arc must span the entire length of the front foil and appear to be a gradual arc with the deepest point, not further back than 12 inches from the leading edge. The belly/curl arc must start at the front foil’s leading edge and shall not exceed a depth of 2 inches. Front foil thickness cannot exceed 3.6 inches.
- Arc braces or supports shall be oriented thin edge to face the air stream. Only rectangular round or oval metal braces not exceeding 1-inch in width will be permitted. Adjustable bracing will not be permitted.
- Aero elliptical brace material will not be permitted.
- Brace or support shall not resemble a wicker bill or a split wing. Side boards must be mounted square to the center foil and parallel to each other. Any kick-out will not be permitted.
- Front side boards will have a maximum 12 inches tall and 26 inches long with an overhand not exceeding 1-inch from the center foil front edge to the side board front edge. Side boards may have a maximum of 1/2 –inch front, back, top and bottom turnout(s) (Flange).
- The top wind side boards maximum size will be 72 inches long and 30 inches tall. The top 2/3’s of each top wing side panel shall consist of only 2 corners. Each corner shall be set at a 90 degree angle with no variance. This portion of the side panels leading edge may not be behind the center foils leading edge. Panels must be of one-piece construction and be fabricated flat. Turnouts on all edges of the wing must not exceed 1 1/4” x 1 1/4” and must be oriented at a 90 degree angle to the flat portion of the side panel.
- The driver’s right side opening must be a minimum of 10” vertical and minimum of 21” horizontal at any point. Body panels or sheet metal may extend rearward to triangular bar at back of roll cage and may not extend downward past shock mount to horizontal bar at driver’s compartment. No gurney lips or turnouts are allowed on any body panels. Bottom frame rails behind driver’s seat cannot be enclosed. Hoods may be a multiple-piece design but must appear to be one continuous piece.
- No part of the car can extend past front bumper, with bumper no more than 23” from front of front axle. Nobody pieces to extend beyond front torsion tube except hood.
- No pieces may be added to the basic frame so as to resemble, imitate or be specifically designed to deflect, trap, or form a windbreak of any nature except those used to cool or protect the motor and braking system.
- No titanium in the chassis construction.
- No filing of nerf bars or bumpers. No solid steel nerf bars or bumpers.
- Floor pan and body panels may not be thicker than 0.125” and must be made from aluminum or carbon steel only.
- Drilling of any bolts, fasteners, or heim ends is prohibited.
- No mirrors, radios, or communications equipment is allowed. No on-board computers or any computer adjustable devices allowed.
- The right rear wheel is limited to 18” wide and left rear wheel is limited to 15” wide.
- Any car determined unsafe by the OVSCA will not be allowed to race.
- Flame retardant drive suit and gloves are required.
- All parts have to resemble sprint car parts.
- No adjustments within the drivers reach inside or out of the cockpit except for the fuel shutoff and one way wing slider forward and back only.
Weight Rule Procedure (1,375 lbs with or without mufflers)
o Top five cars that finish heats and A-main must weigh in immediately following the event as you exit the track
o Random weigh-in is possible at any time during program, including after feature finish.
o Cars may cross scales no more than twice to determine weight
o Scales are available at any time for checking weight before program begins, with opportunity to add weight.
o It is your responsibility to remove mud before any weigh-in.
o Weights, if added, must be bolted to mainframe and have car # visibly marked on the weight
o If weight is lost during a race, the car will be black-flagged
- In the event that scales are not available, the weighing procedures will be waived.
Weight Rule Penalties
o If your car is found too light after a heat race, you will be disqualified from that race and given the opportunity to bring your car up to the required weight for the B-Main. In the event that there is no B-Main, you may also be given the opportunity to bring your car up to the required weight and be added to the tail of the A-Main.
o If you are unable to meet the weight requirements, you will still receive show-up points but be disqualified from the finishing order and receive no award pay for the night.
o If you do not pass the weight requirement after the completion of the A-main, you will lose all points and money for the night. Show-up points will still be awarded.
o If race officials determine that weight loss was due to extenuating circumstances, such as parts missing as result of a crash, rough track conditions, etc, last place money and last place points can still be awarded.
o Failure to go to scales as required under “Weight Rule Procedure” section will result in loss of finishing position, money and points for the race in which it occurred.
- PILL DRAW. All cars must draw a pill for qualifying order. Pill draw ends when drivers’ meeting starts. Any cars not drawing a pill will be added after the last car that did draw.
- QUALIFYING. All cars qualify in order drawn and cannot be out of order by more than three cars. If you miss your spot by more than three cars you will receive and “No Time” and be added to the tail of the order. The top qualifier will then draw a pill to determine heat race inversion.
- HEATS. After qualifying, heats will be lined up staggered with potential of a 0-2-4-6 car inversion, based on the pill draw by the fast-time qualifier. 12 cars will be the maximum number of cars allotted per heat and 18 total will transfer to the A-Main event.
- B-MAIN. All cars finished behind the heat transfer positions will then compete in the B-Main event. This race will determine the final positions to complete the A-Main field. If necessary multiple B-Mains will be ran, and the first two heats will combine to form the first B-Main lineup, third and fourth heats will combine to form a second B-Main, etc.
- A-MAIN. There will NOT be any alternates unless determined prior to race by track and event officials. A total of 18 cars will start the race based on their Heat and B-Main finishes.
- PUSH OFF. You are allowed only one push-off per race. If you require a second push-off you go to the tail. A push-off is not a push-off until the motor has fired. After drivers have been called to line up for the A-Main you must be in line for push-off by the time the first car leaves the chute. If you do not make the call, you will be removed from your position and added to the tail. If belts come loose, driver must stop by an official to buckle up. In this case, starting position will be maintained if the green has not been waved.
- GREEN FLAG. When the green flag is dropped, that constitutes the start of the race. The entire field must complete one lap, including the car causing the yellow or red, or the race will be a complete restart. Cars causing the yellow or red go to the tail.
- YELLOW FLAG. If you stop on the racetrack, you are considered part of the yellow and you go to the tail. If you are in any combination of two yellows or reds, you are disqualified from that race. Once you have been pushed off, you cannot delay the start. If you do, you must go to the tail. During yellow, no working on the car on the track is allowed at any time, subject to disqualification. If you run over debris on the track and it becomes hooked to your car and officials consider it dangerous, you will be stopped and given back your spot. If debris is your own and causes a yellow, you must go to the tail. No other work is allowed on the car, other than fixing debris. If you lose a muffler during a race, you are disqualified for that race. If you spin and yellow is brought out, you go to the tail even if your car continued under power. First-lap restarts will be moved straight up if there is no red.
- RED FLAG. On red flag, if you go to the pits you go to the tail. Red flag area will be on the track as designated at the drivers meeting. Do not pass crash site. Officials will have you pushed to the designated area if needed. If any tire is changed on red, you go to the tail. You must not hold up restart or you will be moved to the tail. Any first-lap restarts are red will be re-staggered. ALL RED FLAGS ARE CONSIDERED CLOSED REDS.
- LINING UP FOR ORIGINAL STARTS. All rows must be lined 2 x 2 and nose to tail. The front row will bring the field to the turn four corner at a moderate pace. When this spot is reached, at the drop of the green flag, the front row must accelerate. When the front row accelerates, the remainder of the field may do so also. If you are not paying attention and are passed, this is not a jump. No laying back and creating a gap so as to “get a run.” Any starters that do not start the race properly, the start will be called back and the offender or offenders will be penalized to the tail.
- LINING UP FOR RESTARTS. Form a single file, nose to tail, and do not race. Officials will correct the line-up when they receive it from scorers. When a yellow or red is dropped, the cars will be lined up based on the previously scored green flag lap, minus the involved caution cars. On the restart the field is paced by the leader as is the start of the race, no laying back to “get a run” is permitted. No cars may pass until they pass the pylon. If a car passes before pylon, or hits pylon, or drives below pylon, that car will be scored to the tail.
- CHECKERED FLAG/FINISH. The race is complete once the flagman has displayed checkered and the leader has crossed the finish line. If the yellow or red is displayed after the leader crosses the line under checkered, all cars that have not crossed the line will be scored by their last completed lap minus cars involved in the caution.
- BLACK FLAG. If pointed to you, go to the pits for consultation with officials. If something is broken on your car, there is no grace period for repairs, and you must be back on the track by the one-lap to go signal.
- FLAT TIRE and OTHER REPAIRS. During qualifying events, there is no grace period to change flat tires or make other repairs. If the caution flag is out, or if you cause a caution flag, you may go to the pits for repairs but must be pushed-off and on the track by the time the one-lap signal has been given. Failure to comply will result in a black flag. No car may race or attempt to race on a flat tire. The decision as to whether a tire is flat rests solely with the event and track officials. There is a 2 lap flat tire rule for A-Main Only.
- FUEL STOP. There will be NO open red flag fuel stops. If there should be an extraordinary amount of caution laps run, it is then up to the discretion of the officials to allow fuel and air ONLY to be added during a red flag. If a fuel stop does happen you can have only one person do fuel and air, these stops will be timed stops. If you do not clear the track as instructed when the allotted time has run out, you will be put to the tail on the restart. No other adjustments will be made to the car during the course of the race. Any team caught making adjustments to the car during a red flag stop will be disqualified and scored in last place for the event.
- LAPPED CARS. Hold their positions in all races.
- Running under infield tires or off the racing surface to advance position will result in a penalty of two stops per car passed.
- Any driver STOPPING ON THE TRACK to protest will be disqualified. This excludes stopping on the track if instructed by an official or for safety equipment reasons.
- PASSING THE PACE CAR will result in a $50 fine.
Situations may arise that are not precisely covered in this Rule Book.
All rulings and interpretations of the rules included herein will be made by OVSCA and track officials.
These judgments will be final.