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2017 Super Stock Diesel Truck rules

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Diesel Super Stock Trucks

1. Maximum weight 7500 lb.

2. OEM or tube chassis allowed. Wheelbase maximum 158”

3. Firewall - Must have a complete firewall with no holes except for controls. Holes not to exceed ½” larger than the controls. May be constructed of a minimum 1/16” aluminium, 1/16” steel or 1/8” Lexan and must extend downward to the bottom of the frame.

4. Maximum engine size will be 460 cubic inches. Engine must come in one ton or smaller truck. Engine must be OEM replacement or its replica. A replica to be considered must retain stock bore spacing and operate with the stock crankshaft for the model without alterations for chassis mounting.

5. Front of engine block must remain behind the grill and front of engine block can be no farther forward than 25” of center line of front axle.

6. Engine must have cable surrounding block and head. Cable must be minimum 3/8” diameter located between cylinders #1 and #2. Cable must pass thru manifolds. Cable will have 4-6” of slack with a minimum of 4 cable clamps at splice.

7. All engines will have a deflection shield, running the complete length of the block casting. Shield must be securely fastened and must be .060” thick.

8. Hook point must be no closer than 44” of center line of rear axle, hitch height maximum of 26”, with a minimum of a 3.75” X 3.0” opening. Hitch point must be easily accessed. No “trick” type hitches permitted. Hitch must be stationary in all directions. Hitch must be frame mounted. Hitch must be mounted center line of rear axle or behind. Hitch must not exceed a maximum of 33° angle from pivot point to hook point. No hitch supports or adjusters, if fastened to the rear axle housing shall be above the center line of rear axle. Pivot pin of drawbar can be no farther forward than center line of the rear axle.

9. Secondary hitch required. Minimum of 3/8” material, located 12” below primary hitch on the same vertical plane. . (You should be able to look directly through both at the same time – they need to be lined up.)

10. Turbochargers - Limited to a maximum of 3 turbochargers in 2 stage configuration. All trucks with fiberglass bodies require turbo shields, minimum of .060 aluminum.

11. Exhaust must exit straight up, minimum of cab height, with (2) -3/8” inch bolts mounted in a cross pattern.

12. Intercoolers allowed. Dumping or draining intercoolers without a catch pan within 100 feet of competition track is prohibited.

13. Water injection is permitted. Lubrication only. No alcohol or oxygen enhancers allowed.

14. Air shut off must have a cable that goes to the rear of truck operated by the sled operator and also one to the cab of the truck. Kill switch will be securely mounted to the back of the vehicle and have a two (2) inch diameter metallic ring to attach the sled.

15. Fuel Systems: Any fuel injection pump allowed. The use of multiple high pressure common rail fuel pumps is allowed. Ford Powerstroke engine may utilize a second HPOP. Electronic fuel injection is permitted. A 3-way dump valve mounted before of the injection pump is mandatory which can be operated by the driver while strapped in the seat.

16. No fuel lines or tanks permitted inside of truck cab unless securely mounted in marine box.

17. Fuel limited to diesel fuel. No alcohol, nitrous, propane or any oxygen enhancing agents allowed.

18. Maximum tire size to be 112 inch circumference, when inflated to 30psi with original bar, not to exceed 18 inches in width before cutting. Maximum of four tires permitted.

19. Front weights must be no more than 60” from the center line of the front axle to forward most point and be securely fastened.

20.​Drive train will consist of the following: Any front axle, any transfer case and any rear axle. No planetaries permitted.

21.​Axle shields are required. Shield to be .060” thickness steel or aluminium. Shield not to be mounted to axles ends or hub bolts. A hole may be cut in one to allow locking in of hubs.

22.​No cast iron clutches or flywheels permitted, must be SFI approved. Trucks with automatic transmissions refer to General Rules.

23.​SFI bellhousing blankets and /or SFI blow proof bellhousing required.

24.​All U-joints must be shielded 360 degrees with 3/8” thick aluminium w/1/8” steel liner or 5/16” thick steel. Shield will be 6 inches long minimum and centered on u-joint. Inside diameter of shield will be no more than 2 inches larger than u-joint.

25.​All intermediate shafts between the transmission and transfer case will be totally enclosed in 3/8” aluminium or 5/16” steel, ¼” of shaft may be visible.

26.​Fire extinguisher (2.5#) or fire suppression system, helmets-Snell 90 or better, SFI fire suits, hat sock, gloves, shoes, and seatbelts required. See General Rules for SFI specifications on clothing.

27.​All other rules may be found in 4x4 Truck and General Rule sections.

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