Section 36 - SUPER STOCK DIESEL TRUCK (SSDT)¶

Unless specifically outlined below in the class specific rules, the Truck General Rules and the overall General rules outlined above will apply.

36.1 - General Rules¶

Super Stock Diesel Trucks will compete at a maximum weight of 7,500 lbs.
No fuel lines or tanks are permitted inside of the truck cab unless securely mounted in a marine box.

Hitch height maximum of 26”
Hook point must be no closer than 44” of center line of rear axle
Hitch must be frame mounted.
Hitch must be mounted center line of rear axle or behind.
Hitch must not exceed a maximum of 33 degree angle from pivot point to hook point.
No hitch supports or adjusters, 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 the center line of the rear axle.

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.
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.
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.
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.
Intercoolers are allowed.
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 the injection pump is mandatory that can operated by the driver while strapped in the seat.
Air shut off must have a cable that goes to the rear of truck operated by the sled operator.
Air shut off must have a cable that goes to the cab of the truck.
Kill cable will be securely mounted to the back of the vehicle and have a two (2) inch diameter metallic ring to attach the sled.

Limited to a maximum of 3 turbochargers in 2 stage configurations.
All trucks with fiberglass bodies require turbo shields, minimum of .060 aluminum.
Exhaust must exit straight up, minimum of cab height, with (2) -3/8” inch bolts mounted in a cross pattern.
Trucks running a compound turbo setup are not required to run an intake containment device.

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.

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

Drive train will consist of the following: Any front axle, any transfer case and any rear axle.
No planetaries permitted.
Axle shields are required. Shield to be .060” thickness steel or aluminum. Shield not to be mounted to axles ends or hub bolts. A hole may be cut in one to allow locking in of hubs.
No cast iron clutches, or flywheels permitted, must be SFI approved.
Trucks with automatic transmissions refer General Rules.
SFI bell housing blankets and /or SFI blow proof bell housing required.
All U-joints must be shielded 360 degrees with 3/8” thick aluminum 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.
All intermediate shafts between the transmission and transfer case will be totally enclosed in 3/8” aluminum or 5/16” steel, 1/4” of shaft may be visible.

Only OTTPA approved fuel and water allowed in the Super Stock Diesel Truck class.
VGM water is the only water injected water that is allowed.
A \$50 fine will be assessed for lack of fuel and water test ports for all classes.
A \$50 fine will be assessed for any minor infractions of fuel or water quality.
Water injection is permitted. Lubrication only.
No alcohol or oxygen enhancers allowed.