NHRDA
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Below are the proposed 2014 NHRDA Sled Pulling Series Rules
The NHRDA has agreed to implement Lucas Oil PPL Rules in the attempt to help unite Truck Pulling across the USA so competitors can build their trucks and compete at events across the United States.
To the best of our knowledge this rules match the PPL rules, but we are still waiting for final confirmation and might have some amendments in the future.
2.6 Diesel 4X4 Truck
• Maximum 8000lbs weight with driver included
• Ballast is permitted. Front hanging weights are allowed, not to exceed 60 inches forward of the center of the front axle. This will be measured from center of front wheels to end of weight assembly. Ballast may be added in the bed of the truck.
• The body must be the OEM truck body, including the full bed floor. The body must retain full sheet metal, after-market hoods are permitted. The hood must be closed and securely latched while the vehicle is hooked to the sled.
• Front brakes are mandatory, rear brakes optional
• The OEM chassis is mandatory. The engine must be in the OEM location for the body used. The vehicle must retain the full OEM chassis. Wheel tubs, back-half conversions, tube chassis, etc., are prohibited.
• All drivers must have a valid state driver’s license and full fire suit and OEM or equivalent SFI restraint system is mandatory and must be worn
• An OEM transmission and transfer case are mandatory. They must have been an option on a one-ton or smaller pickup.
• All trucks must have at least six inch wide u-joint shields around the rear u-joint constructed of at least 1/4 inch steel or 3/8 inch aluminum that will safely contain the u-joint and the end of the rear shaft. All shields must be securely mounted to the vehicle. Any front shaft u-joint that is visible from the side of the truck must be shielded to contain the u-joint and the end of the shaft.
• The engine is limited to a stock-appearing, Engine and transmissions can be interchanged between Dodge, Ford and GM as long as they came in a 1 ton truck or less from the factory. Complete engine must have stock appearance except where otherwise noted in these rules. Aftermarket intake manifolds are allowed
• All vehicles must be equipped to direct exhaust upward. Two 3/8 inch diameter bolts must be placed through the exhaust pipe in a cross pattern within one inch of each other, within 12” of the turbo.
• A fire extinguisher system is permitted. It must be securely mounted. A complete OEM firewall is mandatory.
• The complete OEM floor pan is mandatory.
• Hand throttles permitted. The fuel must be pump #1/#2 diesel, Soy/Biodiesel fuel. No propane or NO2 permitted or any other oxygen enhancers. Racing fuel cells are permitted.
• Maximum of one P7100 pump limited to one plunger per cyclinder (Sigma pumps prohibited). The use of multiple high-pressure common-rail fuel pumps is legal. Powerstroke engines with a single factory turbo may utilize a second HPOP.
• Hook point must be no closer than 44” of centerline 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 centerline of rear axle or behind. Hitch must not exceed a maximum of 25 degree angle from pivot point to hook point.
• Non-OEM rear-end housings are prohibited. It must have been an option on a one-ton or smaller pick
up. Rear axle bolts must be covered by a cap or shield.
• Safety switch (Raincap or guillotine) must shut-off air to diesel motors. Switch will be securely mounted
to the back of the vehicle and have a two inch diameter ring to attach to the sled.
• Hydraulic steering permitted.
Suspension, Front:
• The upper mounting point for strut assemblies must be in the factory location. Adjustable caster/camber
pillow ball mounts are permitted. The lower control arm may be strengthened provided factory-mounting
points to chassis are maintained. The lower mounting point for the strut assembly may be modified for
improved caster or camber. Strut tower braces, lower tie bars, sway bars, and limit straps are
permitted. Traction bars and devices are permitted.
• Lowering or raising the vehicle height with suspension modifications is permitted; must be bolt on only;
welds permitted for attachment to frame or axle housing. Sway bars, limit straps, and camber kits
permitted. Traction bars and devices are permitted; Blocked suspension is permitted. No air bags.
• Must be D.O.T. approved tire. Maximum tire height 35” no studded tires or chains. No alteration to tires
allowed. No bar or terra tires. Dual rear wheels are permitted front dual prohibited. Cut tires are
prohibited. 102” Max outside tire to outside tire.
• The vehicle must retain the original factory wheelbase and track width. Maximum of 1 ton truck chassis
only allowed.
• Non-OEM transfer cases are prohibited. The transfer case must have been an option on a one-ton or
smaller pick up truck.
• Automatic Transmissions
Non-OEM transmissions are prohibited. Aftermarket torque converters, valve bodies and internal
components are permitted. Transmission brakes are prohibited. Any non-OEM floor-mounted automatic
transmission shifter must be equipped with a spring-loaded positive reverse lockout device to prevent
the shifter from accidentally being put into reverse gear. A functional neutral safety switch is mandatory.
All transmission lines must be metallic or high-pressure-type hose. All vehicles using an automatic
transmission must be equipped with a transmission shield meeting SFI Spec 4.1 and must be labeled
accordingly. A blanket-type shield is permitted; it must be appropriately labeled as meeting SFI Spec
4.1 and it must extend from the rear of the block to the front of transmission main body the bell housing
area is to be completely covered six inch overlap where it is fastened. All non-blanket-type shields must
incorporate two (or one, per manufacturer’s instructions) 3/4 inch by 1/8 inch straps that bolt to the
shield on each side and pass under the transmission pan unless the transmission pan is labeled as
meeting SFI Spec 4.1. All vehicles using an automatic transmission must be equipped with a flex plate
meeting SFI Spec 29.1 and be covered by a flex plate shield meeting SFI Spec 30.1.
Manual Transmissions
• Non-OEM transmissions are prohibited. Aftermarket internal components are permitted. A clutch
meeting minimum SFI Spec 1.1 or 1.2 is mandatory on all vehicles. All manual transmissions must be
clutch assisted. Sequential shifters are prohibited. All vehicles equipped with a manual transmission
must.
• Have a flywheel shield labeled as meeting minimum SFI Spec 6.3 or greater. Applications for which an SFI Spec flywheel shield is not available may use a properly attached SFI 4.1 or 4.2 blanket that completely covers the bellhousing; it must be attached to the block and extend rearward to the transmission with a minimum six inch overlap where it is fastened.
• The vehicle is limited to a 2.6 inducer bore single turbocharger. The compressor wheel must protrude into a 2.6” bore for 1/8”. The inlet will be measured using a 2.605 inch plug the plug must not be able to enter the inducer bore. A stock map width enhancement (MWE) groove must be inside neck area where intake cover is measured. No MWE groove will be allowed that has a width greater than .200”. All provisions allowing air into the wheel other than via the bore and the MWE groove are prohibited. The vehicle driver will be responsible for making compressor wheel accessible for tech personal to measure bore and be able to inspect compressor wheel.
• Water injection is prohibited. All system components must be removed from the truck.
• Intercoolers are allowed. Dumping/draining of intercooler within 100 feet of track is prohibited.
• Must have current NHRDA membership and competition number
• Vehicle must display NHRDA decal on both sides for vehicle and be in plain view
RACE DIRECTOR will have final say if a truck is in question
Safety will not be sacrificed by an unsafe vehicle or driver
3.0 Diesel Truck
• Maximum weight of 7800lbs with driver.
• Trucks must remain stock appearing. Must have full size steel or OEM type body.
• Maximum engine size will be 460 cubic inch. Engines must come from factory in one ton or smaller Diesel pickup truck. Engine must remain in stock location as intended by manufacturer.
• Front of engine block can be no farther forward than 17” of centerline of front axle.
• Hook point must be no closer than 44” of centerline 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 25 degree angle from pivot point to hook point.
• The vehicle is limited to a 3.0 inducer bore single turbocharger. The compressor wheel must protrude into a 3.0” bore for 1/8”. The inlet will be measured using a 3.005 inch plug the plug must not be able to enter the inducer bore. A stock map width enhancement (MWE) groove must be inside neck area where intake cover is measured. No MWE groove will be allowed that has a width greater than .250”. All provisions allowing air into the wheel other than via the bore and the MWE groove are prohibited. The vehicle driver will be responsible for making compressor wheel accessible for tech personal to measure bore and be able to inspect compressor wheel.
• Exhaust must exit straight up, with (2) 3/8” bolts mounted in a cross pattern no more that 1” apart as close to the turbine wheel as possible, no more that 6” from turbine wheel.
• No cast iron clutches or flywheels permitted.
• Fuel safety kills and/or air shutoff must be installed on the rear of truck. Kill switch will be securely mounted to the back of the vehicle and have a two (2) inch diameter ring to attach the sled.
• No fuel lines or tanks permitted inside of truck cab unless securely mounted in marine box.
• Computer chips and boxes permitted.
• Fuel Systems: Largest fuel injection pump allowed will be a P-Pump with only one plunger per cylinder.
• Must be D.O.T. approved tire. Maximum tire height 35” no studded tires or chains. No alteration to tires allowed. No bar or terra tires. Dual rear wheels are permitted Dual front wheels prohibited. Cut tires are prohibited. Maximum wheelbase length 158”.
• Water injection 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. No weights are allowed in cab of truck if in bed of truck they are to be securely fastened to bed of truck.
• Fuel limited to diesel fuel and bio-diesel only. No alcohol, nitrous, propane or any oxygen enhancing agents allowed.
• Drive train will consist of the following: Any front axle, any transfer case 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.
• S.F.I. Bell housing Blankets and /or S.F.I Blow proof Bell housing required
• All U-joints must be shielded 360 degrees with 3/8” thick aluminum 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, ¼” of shaft may be visible.
• Suspension modifications are permitted. Removable suspension blocks are permitted.
• Fire Extinguishers, helmets Snell 90 or better and seatbelts required.
• SFI Suits are permitted.
• Must have current NHRDA membership and competition number
• Vehicle must display NHRDA decal on both sides for vehicle and be in plain view
RACE DIRECTOR will have final say if a truck is in question
Safety will not be sacrificed by an unsafe vehicle or driver
Diesel Super Stock Trucks
• Maximum weight of 7500lbs with driver.
• Maximum engine size will be 460 cubic inch. Engines must come from factory in one ton or smaller Diesel pickup truck. Engine must remain in stock location as intended by manufacturer.
• Wheelbase maximum 158” for tube chassis. OEM chassis of 161” are ok.
• No nitrous, propane or alcohol -- #2 Diesel Only
• Water Injection is permitted in this class
• Turbochargers- Limited to 2 stage configuration
• Hanging weights allowed- Weights must not extend more than 60" from centerline of front axle (Weights must be secure)
• 26" Hitch height
• Hitch hook point must not be less than 44" from centerline of rear axle. Opening in drawbar must be 3.75” X 3.00.
• Secondary hitches required. 200 lbs. deduction in weight for not having a safety hitch.
• Hitch must not exceed a maximum of 33 degree angle from pivot point to hook point
• Rigid Suspension allowed
• Drop boxes, Reversers allowed
• Snell 90 or better helmets required
• S.F.I. Jacket and pants required
• No cast iron clutches or flywheels permitted.
• S.F.I Bell housing Blankets and/or S.F.I Blow proof Bell housings required
• All U-joints must be shielded 360 degrees with 3/8” thick aluminum or 5/16” thick steel. Shield will be 6 inches long minimum and centered on U-joint. Inside diameter of shield will 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.
• Fire Extinguisher is mandatory and seatbelts required
• Exhaust must exit straight up, with (2) -3/8” inch bolts mounted in a cross pattern.
• Air Shutoff's required- consisting of (1) cable to the rear of the truck to be operated by the sled, and also a cable inside the driver's compartment
• Kill switch will be securely mounted to the back of the vehicle and have a two (2) inch diameter ring to attach the sled.
• Axle shields are required. Shield to be .060” thickness steel or aluminum. Shield not to be mounted to axle ends or hub bolts. A hole may be cut in one to allow locking in of hubs.
• 35" tire maximum height, tread width not to exceed 18”.
• Cut or Sharpened tires allowed.
• Mechanical or electronic fuel injection permitted.
• 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.
• Must have current NHRDA membership and competition number
• Vehicle must display NHRDA decal on both sides for vehicle and be in plain view
RACE DIRECTOR will have final say if a truck is in question
Safety will not be sacrificed by an unsafe vehicle or driver
The NHRDA has agreed to implement Lucas Oil PPL Rules in the attempt to help unite Truck Pulling across the USA so competitors can build their trucks and compete at events across the United States.
To the best of our knowledge this rules match the PPL rules, but we are still waiting for final confirmation and might have some amendments in the future.
2.6 Diesel 4X4 Truck
• Maximum 8000lbs weight with driver included
• Ballast is permitted. Front hanging weights are allowed, not to exceed 60 inches forward of the center of the front axle. This will be measured from center of front wheels to end of weight assembly. Ballast may be added in the bed of the truck.
• The body must be the OEM truck body, including the full bed floor. The body must retain full sheet metal, after-market hoods are permitted. The hood must be closed and securely latched while the vehicle is hooked to the sled.
• Front brakes are mandatory, rear brakes optional
• The OEM chassis is mandatory. The engine must be in the OEM location for the body used. The vehicle must retain the full OEM chassis. Wheel tubs, back-half conversions, tube chassis, etc., are prohibited.
• All drivers must have a valid state driver’s license and full fire suit and OEM or equivalent SFI restraint system is mandatory and must be worn
• An OEM transmission and transfer case are mandatory. They must have been an option on a one-ton or smaller pickup.
• All trucks must have at least six inch wide u-joint shields around the rear u-joint constructed of at least 1/4 inch steel or 3/8 inch aluminum that will safely contain the u-joint and the end of the rear shaft. All shields must be securely mounted to the vehicle. Any front shaft u-joint that is visible from the side of the truck must be shielded to contain the u-joint and the end of the shaft.
• The engine is limited to a stock-appearing, Engine and transmissions can be interchanged between Dodge, Ford and GM as long as they came in a 1 ton truck or less from the factory. Complete engine must have stock appearance except where otherwise noted in these rules. Aftermarket intake manifolds are allowed
• All vehicles must be equipped to direct exhaust upward. Two 3/8 inch diameter bolts must be placed through the exhaust pipe in a cross pattern within one inch of each other, within 12” of the turbo.
• A fire extinguisher system is permitted. It must be securely mounted. A complete OEM firewall is mandatory.
• The complete OEM floor pan is mandatory.
• Hand throttles permitted. The fuel must be pump #1/#2 diesel, Soy/Biodiesel fuel. No propane or NO2 permitted or any other oxygen enhancers. Racing fuel cells are permitted.
• Maximum of one P7100 pump limited to one plunger per cyclinder (Sigma pumps prohibited). The use of multiple high-pressure common-rail fuel pumps is legal. Powerstroke engines with a single factory turbo may utilize a second HPOP.
• Hook point must be no closer than 44” of centerline 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 centerline of rear axle or behind. Hitch must not exceed a maximum of 25 degree angle from pivot point to hook point.
• Non-OEM rear-end housings are prohibited. It must have been an option on a one-ton or smaller pick
up. Rear axle bolts must be covered by a cap or shield.
• Safety switch (Raincap or guillotine) must shut-off air to diesel motors. Switch will be securely mounted
to the back of the vehicle and have a two inch diameter ring to attach to the sled.
• Hydraulic steering permitted.
Suspension, Front:
• The upper mounting point for strut assemblies must be in the factory location. Adjustable caster/camber
pillow ball mounts are permitted. The lower control arm may be strengthened provided factory-mounting
points to chassis are maintained. The lower mounting point for the strut assembly may be modified for
improved caster or camber. Strut tower braces, lower tie bars, sway bars, and limit straps are
permitted. Traction bars and devices are permitted.
• Lowering or raising the vehicle height with suspension modifications is permitted; must be bolt on only;
welds permitted for attachment to frame or axle housing. Sway bars, limit straps, and camber kits
permitted. Traction bars and devices are permitted; Blocked suspension is permitted. No air bags.
• Must be D.O.T. approved tire. Maximum tire height 35” no studded tires or chains. No alteration to tires
allowed. No bar or terra tires. Dual rear wheels are permitted front dual prohibited. Cut tires are
prohibited. 102” Max outside tire to outside tire.
• The vehicle must retain the original factory wheelbase and track width. Maximum of 1 ton truck chassis
only allowed.
• Non-OEM transfer cases are prohibited. The transfer case must have been an option on a one-ton or
smaller pick up truck.
• Automatic Transmissions
Non-OEM transmissions are prohibited. Aftermarket torque converters, valve bodies and internal
components are permitted. Transmission brakes are prohibited. Any non-OEM floor-mounted automatic
transmission shifter must be equipped with a spring-loaded positive reverse lockout device to prevent
the shifter from accidentally being put into reverse gear. A functional neutral safety switch is mandatory.
All transmission lines must be metallic or high-pressure-type hose. All vehicles using an automatic
transmission must be equipped with a transmission shield meeting SFI Spec 4.1 and must be labeled
accordingly. A blanket-type shield is permitted; it must be appropriately labeled as meeting SFI Spec
4.1 and it must extend from the rear of the block to the front of transmission main body the bell housing
area is to be completely covered six inch overlap where it is fastened. All non-blanket-type shields must
incorporate two (or one, per manufacturer’s instructions) 3/4 inch by 1/8 inch straps that bolt to the
shield on each side and pass under the transmission pan unless the transmission pan is labeled as
meeting SFI Spec 4.1. All vehicles using an automatic transmission must be equipped with a flex plate
meeting SFI Spec 29.1 and be covered by a flex plate shield meeting SFI Spec 30.1.
Manual Transmissions
• Non-OEM transmissions are prohibited. Aftermarket internal components are permitted. A clutch
meeting minimum SFI Spec 1.1 or 1.2 is mandatory on all vehicles. All manual transmissions must be
clutch assisted. Sequential shifters are prohibited. All vehicles equipped with a manual transmission
must.
• Have a flywheel shield labeled as meeting minimum SFI Spec 6.3 or greater. Applications for which an SFI Spec flywheel shield is not available may use a properly attached SFI 4.1 or 4.2 blanket that completely covers the bellhousing; it must be attached to the block and extend rearward to the transmission with a minimum six inch overlap where it is fastened.
• The vehicle is limited to a 2.6 inducer bore single turbocharger. The compressor wheel must protrude into a 2.6” bore for 1/8”. The inlet will be measured using a 2.605 inch plug the plug must not be able to enter the inducer bore. A stock map width enhancement (MWE) groove must be inside neck area where intake cover is measured. No MWE groove will be allowed that has a width greater than .200”. All provisions allowing air into the wheel other than via the bore and the MWE groove are prohibited. The vehicle driver will be responsible for making compressor wheel accessible for tech personal to measure bore and be able to inspect compressor wheel.
• Water injection is prohibited. All system components must be removed from the truck.
• Intercoolers are allowed. Dumping/draining of intercooler within 100 feet of track is prohibited.
• Must have current NHRDA membership and competition number
• Vehicle must display NHRDA decal on both sides for vehicle and be in plain view
RACE DIRECTOR will have final say if a truck is in question
Safety will not be sacrificed by an unsafe vehicle or driver
3.0 Diesel Truck
• Maximum weight of 7800lbs with driver.
• Trucks must remain stock appearing. Must have full size steel or OEM type body.
• Maximum engine size will be 460 cubic inch. Engines must come from factory in one ton or smaller Diesel pickup truck. Engine must remain in stock location as intended by manufacturer.
• Front of engine block can be no farther forward than 17” of centerline of front axle.
• Hook point must be no closer than 44” of centerline 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 25 degree angle from pivot point to hook point.
• The vehicle is limited to a 3.0 inducer bore single turbocharger. The compressor wheel must protrude into a 3.0” bore for 1/8”. The inlet will be measured using a 3.005 inch plug the plug must not be able to enter the inducer bore. A stock map width enhancement (MWE) groove must be inside neck area where intake cover is measured. No MWE groove will be allowed that has a width greater than .250”. All provisions allowing air into the wheel other than via the bore and the MWE groove are prohibited. The vehicle driver will be responsible for making compressor wheel accessible for tech personal to measure bore and be able to inspect compressor wheel.
• Exhaust must exit straight up, with (2) 3/8” bolts mounted in a cross pattern no more that 1” apart as close to the turbine wheel as possible, no more that 6” from turbine wheel.
• No cast iron clutches or flywheels permitted.
• Fuel safety kills and/or air shutoff must be installed on the rear of truck. Kill switch will be securely mounted to the back of the vehicle and have a two (2) inch diameter ring to attach the sled.
• No fuel lines or tanks permitted inside of truck cab unless securely mounted in marine box.
• Computer chips and boxes permitted.
• Fuel Systems: Largest fuel injection pump allowed will be a P-Pump with only one plunger per cylinder.
• Must be D.O.T. approved tire. Maximum tire height 35” no studded tires or chains. No alteration to tires allowed. No bar or terra tires. Dual rear wheels are permitted Dual front wheels prohibited. Cut tires are prohibited. Maximum wheelbase length 158”.
• Water injection 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. No weights are allowed in cab of truck if in bed of truck they are to be securely fastened to bed of truck.
• Fuel limited to diesel fuel and bio-diesel only. No alcohol, nitrous, propane or any oxygen enhancing agents allowed.
• Drive train will consist of the following: Any front axle, any transfer case 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.
• S.F.I. Bell housing Blankets and /or S.F.I Blow proof Bell housing required
• All U-joints must be shielded 360 degrees with 3/8” thick aluminum 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, ¼” of shaft may be visible.
• Suspension modifications are permitted. Removable suspension blocks are permitted.
• Fire Extinguishers, helmets Snell 90 or better and seatbelts required.
• SFI Suits are permitted.
• Must have current NHRDA membership and competition number
• Vehicle must display NHRDA decal on both sides for vehicle and be in plain view
RACE DIRECTOR will have final say if a truck is in question
Safety will not be sacrificed by an unsafe vehicle or driver
Diesel Super Stock Trucks
• Maximum weight of 7500lbs with driver.
• Maximum engine size will be 460 cubic inch. Engines must come from factory in one ton or smaller Diesel pickup truck. Engine must remain in stock location as intended by manufacturer.
• Wheelbase maximum 158” for tube chassis. OEM chassis of 161” are ok.
• No nitrous, propane or alcohol -- #2 Diesel Only
• Water Injection is permitted in this class
• Turbochargers- Limited to 2 stage configuration
• Hanging weights allowed- Weights must not extend more than 60" from centerline of front axle (Weights must be secure)
• 26" Hitch height
• Hitch hook point must not be less than 44" from centerline of rear axle. Opening in drawbar must be 3.75” X 3.00.
• Secondary hitches required. 200 lbs. deduction in weight for not having a safety hitch.
• Hitch must not exceed a maximum of 33 degree angle from pivot point to hook point
• Rigid Suspension allowed
• Drop boxes, Reversers allowed
• Snell 90 or better helmets required
• S.F.I. Jacket and pants required
• No cast iron clutches or flywheels permitted.
• S.F.I Bell housing Blankets and/or S.F.I Blow proof Bell housings required
• All U-joints must be shielded 360 degrees with 3/8” thick aluminum or 5/16” thick steel. Shield will be 6 inches long minimum and centered on U-joint. Inside diameter of shield will 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.
• Fire Extinguisher is mandatory and seatbelts required
• Exhaust must exit straight up, with (2) -3/8” inch bolts mounted in a cross pattern.
• Air Shutoff's required- consisting of (1) cable to the rear of the truck to be operated by the sled, and also a cable inside the driver's compartment
• Kill switch will be securely mounted to the back of the vehicle and have a two (2) inch diameter ring to attach the sled.
• Axle shields are required. Shield to be .060” thickness steel or aluminum. Shield not to be mounted to axle ends or hub bolts. A hole may be cut in one to allow locking in of hubs.
• 35" tire maximum height, tread width not to exceed 18”.
• Cut or Sharpened tires allowed.
• Mechanical or electronic fuel injection permitted.
• 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.
• Must have current NHRDA membership and competition number
• Vehicle must display NHRDA decal on both sides for vehicle and be in plain view
RACE DIRECTOR will have final say if a truck is in question
Safety will not be sacrificed by an unsafe vehicle or driver
