DPO RULES
8500 lb DIESEL STREET STOCK
1) Trucks must have factory frame and body. No fiberglass weight saving sheet metal or homemade frames.
2) Truck must have visible VIN number that matches that on the VALID registration and insurance.
3) Engine must be a factory available engine for a one ton truck or smaller.
4) Engine is limited to one factory turbo that came with the engine. Performance turbos are not allowed. i. e. cummins hx35, ford garrett.
5) No alcohol or water injection.
6) No solid suspensions. Must have at least two inches of suspension travel.
7) 26" hitch height, pulled from receiver hitch only and must have at least a 3" diameter opening-clevis ok
8 ) D. O. T. street legal tires. No bar tires or cut tires.
9) No hanging weight extending beyond the vehicle. Weights must be secured in the truck bed.
10) Seatbelts are required and to be used.
11) If your truck emits excessive amounts of black smoke you will be disqualified.
8500 lb. Diesel Prostock
1) Trucks must have factory frame and body. No fiberglass weight saving sheet metal or homemade frames. Trucks must be street legal, but can be hauled.
2) Truck must have visible VIN number that matches that on the registration and insurance and must have the license affixed to the truck.
3) Engine must be a factory available diesel engine for a one ton truck or smaller. This class is limited to one turbo.
4) All exhaust must exit either straight up or down. Two 7/16”dia bolts must be placed in the exhaust at right angles to each other.
5) 26" hitch height, pulled from receiver hitch only, must have at least a 3" diameter opening and be stationary and parallel to the ground. Hitch point will be the furthest most point to the rear of the vehicle.
6) Axles, transfer cases, and transmissions must be appropriate for the truck. i. e. had to have been factory available in one ton or smaller trucks.
7) D. O. T. street legal tires. No studded tires or chains.
8 ) Hanging weights are allowed, but cannot extend more than 60” past the centerline of the front axle.
9) Seat belts are required to be used. A fire extinguisher in working condition is required to be within easy reach of the driver.
10) Driver must adhere to the flagman, or will be disqualified
11) Driver will draw for pulling order at registration. Any truck that is not in line and ready to pull when called will be dropped to last, if unable to hook at the end they will be disqualified.
12) All trucks must undergo tech inspection before they are allowed to pull. This inspection will be required annually. Any/all trucks may be required to undergo an additional tech inspection and/or be re-weighed at any time.
13) Judges may prohibit any vehicle from pulling that is deemed unsafe. Decisions of the track officials and or director of the competition are final.
14) Scatter shields are strongly urged, but not required, unless the vehicle is turning in excess of 4000rpm.
8500lb Diesel Superstock
1) Trucks must have factory frame and body. No fiberglass weight saving sheet metal or homemade frames. Trucks must be street legal, but can be hauled.
2) Engine must be a factory available diesel engine for a one ton truck or smaller. There is a displacement limit of 500cid for this class. This class is limited to a maximum of two turbo compounding stages.
3) All exhaust must exit either straight up or down. Two 7/16dia bolts must be placed in the exhaust at right angles to each other and within one (1”) inch of each other.
4) 26" hitch height, pulled from receiver hitch only, must have at least a 3" diameter opening and be stationary and parallel to the ground. Hitch point will be the furthest most point to the rear of the vehicle.
5) D. O. T. street legal tires. No studded tires or chains or cut tires.
6) Hanging weights are allowed, but cannot extend more than 60” past the centerline of the front axle.
7) Seat belts are required and to be used. A fire extinguisher in working condition is required to be within easy reach of the driver. Drivers must wear a fire suit and a helmet when in competition.
8 ) Driver must adhere to the flagman, or will be disqualified.
9) Driver will draw for pulling order at registration. Any truck that is not in line and ready to pull when called will be dropped to last, if unable to hook at the end they will be disqualified.
10) All trucks must undergo tech inspection before they are allowed to pull. This inspection will be required annually. Any/all trucks may be required to undergo an additional tech inspection and/or be re-weighed at any time.
11) Judges may prohibit any vehicle from pulling that is deemed unsafe. Decisions of the track officials and or director of the competition are final.
12) Flywheels must be made of steel. Scatter shields or blowproof bellhousings are required, transmission blanket is allowed.
13) Drive shaft loops --3'8” ALUMINUM with 1/8" steel insert or 1/4" steel-- are required with at each drive shaft least two (2) loops on each drive shaft and located not more than 2 inches from the shaft. 6” long 360 degree U-joint hoops for all U-joints(except the front one on the transfercase) to be 5/16” steel, these qualify for hoops. Trucks with rear drive shafts and a carrier bearing will need four (4) hoops (2 on each side of carrier bearing).
14) All Trucks must have working brakes. Doors must open and close.
15) NOS, Propane or Water/Alcohol is allowed—NOS tank if mounted in the cab must be vented to the outside all other tanks to be mounted outside of the cab in a safe manner—we reserve the right to determine safe
16) Air bags are allowed, but they must be disconnected from their inflation system---solid rear suspension is allowed via blocks—can’t be totally welded.
GENERAL RULES
1) No alcohol or drugs are allowed in the pit area and sled pull track
2) 5 mph safety speed limit in the pit area and sled pull track
3) Drivers must attend the driver’s meeting
4) Obey the flag man—green flag means ok and the red flag means stop (no matter what)
5) We reserve the right to re-tech your vehicle after your pull if we deem it necessary
6) Event rules may supercede these rules
7) Cheating will get you suspended from the event and trophies or monies will be forfeited---Cheating twice in the same year will get you disqualified for the remainder of the year and possible disciplinary action for the next year.
8) Drivers must have a valid drivers license.
9) Judges decisions are FINAL
WEIGHTS
1) Weights can be hung from a front hitch to meet the weight requirement, but can not protrude further than 24” from the front bumper
2) No weights in the cab
3) Weights will have to be hung in a safe manner and secured in a safe manner.
4) We reserve the right to determine if the weights are hung or secured safely
Attention: TDR Forum Junkies 
