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Discussion Starter · #1 ·
These are the final major changes to the classes in sled pulling. If you have questions or comments please contact Scott Doty, DHRA Tech at [email protected] or call him 734-587-3082.
Complete rulebooks will be available at the Champion's Banquet, then they will be available for purchase on DHRAonline.com

2008 FINAL Rulebook Changes
Version 3.0.2
Date Changed: 12/20/2007

SLED PULLING

WORK STOCK:

Work Stock will be a trophy only class.

Medium Duty Hauler –Removed entirely from rulebook.

Engine- The engine is limited to an OEM make specific compression ignition engine.

Turbocharger- The turbocharger is limited to an OEM make-specific charger only. Turbochargers from different years in the same make may be interchanged.

STREET DIESEL:

Credentials- All drivers must have a valid state driver’s license and DHRA membership. A competition endorsement is necessary for all participants competing for points.

Engine- The engine block must have been available as a factory option on a one-ton or smaller pickup truck. The use of concrete or other block fillers is prohibited. Electric fans are permitted.

Turbocharger- The vehicle is limited to a single turbocharger; the inducer bore on the compressor housing may be no larger than 2.6 inches measured at the smallest diameter area of the compressor wheel. The largest diameter of the intake compressor wheel may not exceed 100 mm. No bushings allowed. A stock map width enhancement (MWE) groove is allowed. No MWE groove will be allowed that has a width greater than 1/4 inch. All provisions allowing air to the wheel other than via the bore and the MWE groove are prohibited.

SUPER STREET: (Former Street Diesel)

Credentials- All drivers must have a valid state driver’s license, a valid DHRA membership and a competition endorsement.

Engine- The engine block must have been available as a factory option on a one-ton or smaller pickup truck. Blocks must circulate coolant freely. The use of concrete or other block fillers is prohibited. Electric fans are permitted.

Turbocharger- The vehicle is limited to a single turbocharger; the inducer bore on the compressor housing may be no larger than 2.8 inches measured at the smallest diameter area of the compressor wheel. The largest diameter of the intake compressor wheel may not exceed 105 mm No bushings allowed. A stock map width enhancement (MWE) groove is allowed. No MWE groove will be allowed that has a width greater than 1/4 inch. All provisions allowing air to the wheel other than via the bore and the MWE groove are prohibited.


PRO MOD: (Former Super Street)

Credentials- All drivers must have a valid state driver’s license, a valid DHRA membership and a competition endorsement.

Fuel Injection Pump- Sigma or 12-cylinder inline injection pumps are prohibited.

Turbocharger- Vehicles are limited to a single turbocharger only; the inducer bore on the compressor housing may be no larger than 3.0 inches measured at the smallest diameter area of the compressor wheel. No bushings allowed.

SUPER MODIFIED:(former Modified Diesel)

Outlaw Diesel Exhibition- Removed entirely from rulebook.

Credentials- All drivers must have a valid state driver’s license, a valid DHRA membership and a competition endorsement.

Weight Breaks- 7500 lbs. Weight is with driver.

**Posted by DHRAonline.com staff**
 

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... The use of concrete or other block fillers is prohibited. ...
Eric, concrete is a joke. It has rocks in it. ;)

Still cannot understand why a 3.0 charger is not considered a street charger, but I have crazy ideas about what a street truck is.
 

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Discussion Starter · #4 ·
From DHRAonline.com staff:
We apologize for not including the whole turbo rule for Pro Mod, here is the rest of it:
*Two turbochargers are allowed during National events for non-points participants. Atmosphere charger inducer bore on the compressor housing may be no larger than 2.8 inches.
 

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Engine- The engine block must have been available as a factory option on a one-ton or smaller pickup truck. Blocks must circulate coolant freely. The use of concrete or other block fillers is prohibited. Electric fans are permitted.

Would a billet aluminum or steel block fall into this category?
 
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