Section 15 - PRO STREET DIESEL 4X4 2.6 TRUCKS (PSD26)

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

15.1 - General Rules

1. Hand throttles permitted.

2. Functional front hydraulic wheel brakes are mandatory.

3. 2.6 Diesel trucks will compete at a maximum weight of 8,000 lbs.

4. Exhaust manifold and exhaust turbo blankets are required.

15.2 - Drawbar & Hitch

1. The hooking point is defined as the point of contact between the hook of the sled and the rearmost part of the opening of the hitch (i.e. - where the hook drops).

   1. Hooking point must have a minimum of 3 inch by 3 ¾ inch inside opening for the sled hook.

   2. Hooking point must be parallel to the ground and must not hinge or pivot in any direction.

   3. Hook point to be no closer than 44” of centerline of rear axle.

   4. Maximum hitch height of 24”.

2. Hitch must be frame mounted.

3. The use of Reese style hitches is prohibited.

4. Hitch must be located on the centerline of the rear axle or behind.

5. Hitch must not exceed 25-degree angle from pivot point to hook point.

6. No hitch supports or adjusters fastened to rear axle housing shall be above center point of rear axle.

7. The pivot pin of the drawbar can be no further forward than the centerline of the rear axle. 

8. Hitch must be stationary in all directions.

9. Final decision of legality of all hitches resides with the head tech official.

15.3 - Body / Chassis

1. OEM chassis is mandatory; vehicle must retain the full OEM chassis. Wheel tubs, back half conversions, and tube chassis are prohibited.

2. Must retain factory OEM wheelbase for the year, make, and model of the body, not to exceed 172” crew cab long box.

3. The body must be an OEM truck body including the full bed floor. No flatbeds permitted.

4. The body must retain the full sheet metal.

5. After market hoods are permitted. The hood must be closed and securely latched when hooked to the sled.

6. A complete OEM firewall is required.

7. Complete OEM cab floor pan is required

8. The engine must be in the OEM location for the body used.

9. All visible u-joints must be shielded, along with axle bolts.

10. Batteries cannot be located within the cab of the vehicle.

15.4 - Engine

1. The engine block must have been available as a factory option on a one ton or smaller pickup truck. Cubic Inch limit of 460 CI. Diesel Fuel only

2. The fuel injection pump is limited to cylinder number specific (I.e. 6-cylinder pump on a 6-cylinder motor). Dual high-pressure common rail fuel pumps or HPOPs are allowed. Ag governors permitted. No Sigma or 12-cylinder pumps allowed. P pump 3000 or 7100, 13 mm plungers max, ag or street governors.

3. Radiators, if required, must be in stock location and be of at least stock size

4. All factory belt driven accessories, excluding the air conditioning compressor, must be retained and powered via the crankshaft by a standard serpentine or “V” belt. Electric cooling fans are permitted.

5. All trucks must be equipped to direct exhaust upward. Hood stack permitted. Two 1/2 inch diameter bolts must be installed through exhaust pipe in a cross pattern within 1 inch of each other, as close to the turbo as possible.

6. All engines turning more than 4500 RPM must be equipped with a harmonic balancer or dampener meeting SFI Spec 18.1.

7. Factory style or aftermarket air-to-air coolers allowed. No types of water to air coolers, no use of ice, water, cooled gas/vapor, or spray bars allowed.

8. Cylinder head must be OEM or OEM replica for brand of engine. Outside of cylinder head must measure factory length, width, and height. Head must retain factory OEM valve angle. No deck plates permitted.

15.5 - Turbocharger

1. Turbo is limited to a 2.6” inducer bore. Bore must be smooth. No MAP Width Enhancement groove (MWE) allowed. Compressor wheel must protrude into 2.6” bore for 1/8”.

2. Bore will be checked with a 2.605” turbo plug. Plug must not be able to enter inducer bore and contact wheel.

3. Turbo exhaust must exit vertically upward. Exhaust pipe to be located either directly behind the cab or out the truck hood.

15.6 - Tires, Wheels, Suspension, Steering

1. Hydraulic steering permitted

2. An OEM transmission and transfer case are mandatory. They must have been an option on a one ton or smaller pickup.

3. Non-OEM rear-end housings are prohibited. The rear end housings must have been for a one ton or smaller pickup.

4. Rear axle bolts must be covered with a cap or shield.

5. Suspension - Front: The factory suspension configuration must be retained. Modifications to the front suspension that would alter the original location (I.e. moving it forward or backward) are not permitted. The upper mounting point for strut assembly must be in factory location. Adjustable caster/camber pillow ball mounts are permitted. The lower control arm may be strengthened provided the factory mounting points are maintained. Strut tower braces, lower tie bars, sway bars, and limit straps are permitted. Traction bars and devices are permitted. Air shocks are prohibited.

6. Suspension - Rear: Traction bars and devices are permitted. Raising or lowering of vehicle height with suspension modifications is permitted but must be bolt on only. Welds permitted for attachment to frame and axle only. Blocked suspension permitted. No air bags. Rear suspension may be made solid.

7. The tires must be DOT street tires. Cut tires are prohibited. 35x12.50 maximum Factory dually trucks are allowed but must be STOCK size tires for that year and model.

8. No duals allowed.

15.7 - Weights / Weight Boxes

1. Ballast is permitted.

2. Front hanging weights are allowed, weight is not to exceed 60 inches forward of the center of the front axle. This will be measured from the center of front axle to end of the weight assembly.

3. Ballast may be added in the bed of the truck. Weight box permitted only for weight. 

15.8 – Driveline/Transmission

1. Any front axle, transmission, transfer case, and rear axle is permitted.

   1. No planetary axles allowed

   2. Refer to applicable General Rules for Modified FWD Truck when replacing OEM drivetrain components.

2. Manual Transmissions:

   1. When truck is equipped with a manually operated clutch and OEM clutch housing is retained, a SFI 4.2 made to fit blanket is required.

   2. SFI 4.2 blanket must be fitted tight to rear of engine block and properly fastened forward with all straps as manufactured.

   3. Blanket must have a valid and current SFI patch affixed to blanket from the manufacturer before being allowed to compete.

   4. Blanket must be seventeen (17) inches wide and long enough to wrap around the bellhousing with at least a 6-inch overlap.

   5. Blanket to be secured with six (6), 2-inch wide nylon web straps with a steel D-ring on one end and sewn the length of the blanket (except for the overlap area), and long enough to pass back through the D-ring and be tied in a saddle cinch.

   6. Four (4), 2-inch nylon web retaining straps each at the front and back of the blanket.

   7. Trucks with OEM clutch housing removed must be equipped with a SFI approved 6.2, 6.3, or 6.4 bellhousing.

3. Automatic Transmissions:

   1. Aftermarket torque converters, valve bodies, and internal components are permitted.

   2. SFI rated torque converter flex plate along with a SFI 4.1 rated automatic transmission blanket or shield required.

      1. The blanket must extend from rear of engine block to where tail shaft bolts to main housing of transmission.

      2. Blanket must be securely fastened forward with two straps on each side, one above the crankshaft centerline and one below the crankshaft centerline.

      3. Blanket should have 6 inches of overlap.

      4. Blanket straps must be 2 inches wide with not more than 1-inch of space between each strap.

   3. Opening at bottom of transmission / torque converter housing must be enclosed in steel (stock steel cover is acceptable).

15.9 - Fuel & Water

1. VP Racing Fuel is the only fuel that is allowed for use in all pulling vehicles. VP DX fuel is allowed.

2. A \$50 fine will be assessed for lack of fuel test port for all classes.

3. A \$50 fine will be assessed for any minor infractions of fuel quality.

4. Nitrous Oxide is prohibited. No other oxygen extenders are allowed. All system components must be removed from the truck.

5. Propane is prohibited. All system components must be removed from the truck.

6. Water injection is prohibited. All system components must be removed from truck.

7. A Fuel cell is permitted in the factory location or mounted securely in the bed.