2015 Springport Motor Speedway Sport Stock Class Rules
Release (same as 2014 season)
The vision of the Ideal stock class is to provide a place for 4 cylinder and 6 cylinder front and rear wheel drive cars to race. While the intent is to be a stock class, there is enough flexibility in the rules to allow drivers to work on their cars and in the process learn fundamental setup/preparation skills. The most common types of cars that will race in this class are commonly known at other tracks by the names Pony Stocks, Mini Stocks, Sport Stocks, Cyber Stocks, Mod 4, Hornet, etc. Please read these rules thoroughly before making any assumptions about intent. If you have any questions after that point please give us a call
Teching in this series is very easy since all areas of enforcement are clearly visible. Teardowns are not necessary in this series. In addition to the requirement of either 4 or 6 cylinder power, there are some ultimate limits to what is allowed. Those limits are covered in this rule set. Because the class is designed to accommodate a wide range of cars, features will be established based on qualifying times and cars/drivers will be racing against other cars that are comparable to them in speed/time
The advantages to this format is that multiple features can be run and everyone can be assured of having the opportunity to race in a feature without the risk of having to run a consi (B main), and not qualifying for the feature. This format is typically known as an ABC, or bracket style of racing.
Please note: Any car deemed too radical or is determined to have a distinct advantage over the rest of the class will be required to make changes to bring the car back to the intended spirit of the rules. This will be based on the judgment/interpretation of Springport Motor Speedway officials only. The track reserves the right to establish a hard or cap time for the division if the cars have too wide of a variety in qualifying time as a regular occurrence. This will be determined after several weeks of racing have occurred and we have a solid understanding of the types of cars we are attracting on a regular basis. This class is intended to keep costs contained for a division. That will be the "vision for the division" If it becomes entirely lopsided or non-competitive as a division - adjustments of weight or restriction to modifications will occur. As of the current rule set - It’s pretty open ended to allow for a variety of front or rear wheel drive competitors to gain seat time at Springport Motor Speedway.
1. Any 4 cylinder front or rear wheel drive production car, truck or mini-van.
2. Any 6 cylinder front wheel drive unibody style car or minivan.
3. No tube chassis cars. Original frame/unibody of car must be present.
4. No rear wheel drive 6 cylinder cars of any type.
1. Stock production bodies/body panels are preferred.
2. Template bodies of steel, aluminum, or fiberglass are OK.
3. Bodies may be repaired with sheet steel/aluminum but must recreate the stock appearance as closely as possible. *Bodies must remain stock appearing at all times*.
4. Must have full stock appearing bodies, no modified style bodies are allowed.
5. Full windshield mandatory. Lexan or OEM style glass windshields are allowed. Must have a minimum of three vertical bars from top of roll cage to dash. *See safety requirements for further instruction.
6. Front/rear firewalls and floor pans must completely seal driver from engine compartment, trunk area, and track surface. Firewalls and floor pans may be stock, or fabricated from sheet steel. A stock or fabricated rear firewall is mandatory, no removal of hatch or rear deck lid to lighten car or allow airflow.
7. All holes must be patched with metal. *General rule* if a hole is big enough for a golf ball to pass through, patch it.
8. Doors must be welded.
9. Hoods and deck lids must be held shut with hood/deck pins and must be able to open by track officials without the use of special tool, mechanisms, etc.
10. Interior must be “gutted” of anything that can break, shatter, or burn. This includes all glass (except windshield), plastic, cloth, or anything not necessary for racing purposes.
C) Rear spoiler
1. Spoilers must be made of clear Lexan or plastic.
2. Must not be wider than the quarter panels.
3. May not exceed 6 ½ inches from the deck lid at any point.
4. Supports may be used, but may not be higher than the top of spoiler at any point.
1. Engine must match the maker of the car: Chevy to Chevy, Ford to Ford, etc.
2. No turbo, multi-carburetor, rotary, mid or rear engines allowed.
3. Any stock type automatic or manual transmissions OK.
4. Transmission must have operational and functional reverse gear.
E) Fuel/Exhaust systems
1. Racing fuel cell (fully enclosed in steel can) is highly recommended.
2. If the stock gas is located ahead of the rear axle, it may remain in place as is. Double check the gas lines and the tank straps, replace them if they are worn. All stock tanks located behind the rear end must be replaced and relocated in the trunk area. You may use a stock tank that is in good condition, an 8-gallon or smaller fuel cell, or a boat tank, and place one of these in the forward area of your trunk. These tanks must have a metal frame to hold the tanks in place, and must be strapped in place securely. A couple loops of plumber’s strap will not suffice for this. These tanks must be secured solid. If you have a tank in the trunk area, you must patch your entire firewall with sheet metal, so you can’t see the truck area from inside of the driver’s cockpit area. All aftermarket fuel pumps are required to have a kill switch for the fuel pump shut off, located in plain sight, in the window opening behind the driver.
3. Racing fuel cells must be securely mounted in the trunk area and be protected with a steel hoop properly welded to the frame behind the cell.
4. External fuel pumps allowed, but must be wired to shut off with battery kill switch and may not be mounted in the driver’s compartment or be accessible from the driver’s compartment.
5. Steel fuel lines must run below floor pan.
6. Headers allowed, single or dual exhaust.
7. Mufflers are mandatory, and must pass 100 decibel test.
8. Exhaust must exit behind driver and may not be run through driver’s compartment at any point.
9. Catalytic converters must be removed.
1. All suspension components must be stock or stock appearing. Aftermarket components may be used but must mimic the stock component.
2. Must have fully functioning hydraulic style brakes on all four wheels.
1. Any D.O.T. stamped steel belted street radial. Max tire width 195 for four cylinders and 225 for 6 cylinders. Lowest aspect ratio allowed will be 65 series for four cylinders and 60 series for six cylinders. Minimum tread wear rating of 300, must be stamped on tire and visible to tech officials.
2. Made for racing steel safety wheel suggested for right front, highly recommended on all four corners. Maximum width 7”
3. Steel wheels or stock wheels for that make & model of car are acceptable. Stock aluminum or aftermarket aluminum wheels will be allowed. Aftermarket or stock aluminum wheels will be looked at for strength as gauged by tech officials. Do not invest in any wheels that do not have strong support from center section to rim. Maximum wheel width will be 7”
4. Made for racing tires of any type will not be allowed.
5. Wheels must in the area of stock type back spacing - yet able to obtain strut clearance. The track feels that when ordering a wheel, a 2,3,or 4" OFFSET should handle most strut, caliper clearance issues. In the interest of safety, tires will not be allowed past the body line in an excessive manner. If you have any question about your car make - or concern about a wheel issue - Call a Springport Motor Speedway Tech official.
6. One inch lug nuts are mandatory. Wheel studs must be at least flush with outer side of lug nut. Stock or tuner nuts on steel or aluminum wheels will not be allowed.
7. Minimum of four lug nuts/studs per wheel.
1. Weight will be added as deemed necessary by tech officials to maintain parity in the class.
a. Tech officials will determine where and how much weight will be added in these cases
b. NOTE** Bring extra weight with you to the track. Weight may be added for rules infractions or to maintain parity in the class
1. Mirrors are not permitted.
2. Radios/two way communication is not permitted. *Exception* The use of a single channel raceceiver set to the frequency mandated by the speedway will be required.
1. Four post roll cage of quality construction/welding is required. Cage must be constructed of round tubing and may not be black pipe material. Must be welded, not bolted together.
2. Center section of cage must have at least 4 door bars on left side and at least 3 on right side.
3. Left side of cage must have 1/8 inch minimum steel plate welded on. Plate must extend front upright to rear upright and from top door bar to frame rail.
4. All bars within reach of any part of the driver’s body must be padded with approved roll bar padding.
5. Aluminum racing seat properly mounted to roll cage is required.
6. Properly mounted five point racing/safety harness is required. Harness must have a date tag and be no older than 3 years old
7. Properly mounted window net with quick release is required on the driver’s side.
8. Battery must not be located in driver’s compartment. Battery may be moved to trunk area, but must be secured with steel straps. *No Ratchet straps*.
9. Master shut off switch to main battery cable must be placed where it can be reached by driver and safety crew. Recommended placement is on or near the “A” pillar.
10. Quick release steering wheel is highly recommended.
11. Steering wheel centers are to be padded.
12. For rear wheel drive cars, drive shaft must be painted white, have car number clearly marked and must be contained in driveshaft tunnel by at least one drive shaft hoop near the center of the shaft.
13. Dbl layer fire suit or sgl layer fire suit w/name underwear, gloves, helmet, and race shoes required.
14. Neck brace/Hans device highly recommended.
15. Fully charged and properly mounted fire extinguisher is mandatory; 2.5 lbs. minimum.
Note: any car that is deemed unsafe in the opinion of Springport Motor Speedway officials will not be allowed on the racing surface.
This decision is solely up to speedway staff and will not be up for debate.