General Truck Rules
PURE STREET DIESEL CLASS
This class is designed for beginner level pullers.
Can have NO sled pulling modifications such as weight bar bracket mounts, bump stop mounts, or modified receiver hitch mount. We will allow traction bars.
Work Stock Diesel Class
The Work Stock (WS) class is designed for daily-driven, on the road pickup trucks (full-bodied diesel pickup trucks). *****NO NITROUS*****
Valid DOT registration and license plates are mandatory.
The vehicle may be two or four-wheel drive.
Designation: Weight breaks: 8000lbs and 8500lbs Weight is with driver.
REGULATIONS:
Ballast: Ballast is permitted. Hanging weights may not extend more than 60 inches from the centerline of the front axle.
Batteries: The batteries must be securely mounted. They may not be located in the driver compartment or forward of the radiator core support.
Body: The body must be the OEM truck body, including the full bed floor. The body must retain full sheet metal. Metal after-market hoods are permitted. Fiberglass is prohibited. The hood must be closed and securely latched while the vehicle is hooked to the sled. The complete OEM firewall and OEM floor pan is mandatory.
Brakes: Four-wheel hydraulic brakes are mandatory.
Chassis: 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.
Cooling System: Radiators must be in the stock location and be of at least stock size.
Credentials: All drivers must have a valid state drivers license.
Driveline: An OEM transmission and transfer case are mandatory. They must have been an option on a one-ton or smaller pickup.
Driver Restraint System: The OEM restraint system is mandatory and must be worn.
Engine: The engine is limited to a stock-appearing, OEM make-specific compression ignition engine. NITROUS OXIDE is prohibited along with other oxygen extenders as well as the use of PROPANE is also prohibited. All system components MUST be removed from the truck.
*****Exhaust: all exhaust must exit upwards. if you have stock or aftermarket exhaust that exits out the side then you must use a 90 to turn the exhaust up in the air. This is for the safety of our spectators.****
Fuel: The fuel must be pump #1/#2 diesel only. Soy/Bio-diesel fuel is permitted. Off-road diesel fuel is prohibited.
Fuel Injection Pump: The fuel injection pump is limited to a stock-appearing, OEM engine model-specific pump only. The use of multiple high-pressure common-rail fuel pumps is prohibited. Powerstroke engines with a single factory turbo may utilize a second HPOP. Pumps from different years in the same engine model may be interchanged.
Fuel System: The OEM fuel tank is mandatory and must be used. Racing fuel cells are prohibited and must be removed from the vehicle.
Harmonic Balancer: All engines turning 4500 RPM and higher must be equipped with a harmonic balancer or damper meeting SFI Spec 18.1.
Hitch: The hitch must be a receiver-style hitch; reinforcements are permitted. Reinforcements must not extend forward of the centerline of the rear axle. Trick hitches are prohibited. The hooking point must be the rear-most point on the vehicle and must be rearward of the stock location of the tailgate. The hitch must be horizontal to the ground and stationary in all directions. Bumpers may be notched or removed. The hitch’s height from the ground may not exceed 26 inches on 4wd units and 30 inches on 2wd units. The hooking point must have a minimum 3.750-inch inside diameter opening for the sled hook. The hooking point will be measured to the center of the clevis loop.
Interior: A complete interior, including dashboard, door panels, headliner, etc., is mandatory. Two matching front seats are mandatory. Aftermarket seats are permitted; they must be fully upholstered. All factory controls (lights, signals, horn, windows, wipers, etc.) must be retained and be operative. The use of hand-throttle controls are prohibited.
Rear End: 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.
Steering: The vehicle must retain the full, original OEM steering gear. The vehicle must retain the original OEM power steering assistance, if it was so equipped. Additional stabilizers are permitted. Non-OEM power assist methods are prohibited.
Street Equipment: Complete headlight and taillight assemblies (all) are mandatory and must be operative. Complete OEM windshield and windows are mandatory. Windows must be operative per factory specifications; that is, they must open and close via OEM electrical or mechanical means.
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.
Suspension, Rear: An OEM-style suspension is mandatory. Lowering or raising the vehicle height with suspension modifications is permitted. Traction bars and devices are permitted; they must be bolt-on only; welds are permitted for attachment to frame or axle housing. All OEM suspension mounting points must be retained and used.*** SUSPENSION BLOCKS are allowed this year!*** Sway bars, limit straps, and camber kits are permitted. All rear suspensions must use at least one working shock absorber per wheel. Airbag spring assistance is permitted; airbag compressors must be disconnected.
Tires: The tires must be DOT street tires. Cut tires are prohibited.
Transfer Case: Non-OEM transfer cases are prohibited. The transfer case must have been an option on a one-ton or smaller pick up truck.
Transmission, Automatic: 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 with engines running 4500 RPM or more and 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 tail housing with a minimum six inch overlap where it is fastened. All non-blanket-type shields must incorporate two (or one, per manufacturers 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 with engines running 4500 RPM or more and 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.
Transmission, Manual: 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 with engines running 4500 RPM or more. All manual transmissions must be clutch assisted. Sequential shifters are prohibited. All vehicles with engines running 4500 RPM or more and 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 bell housing; it must be attached to the block and extend rearward to the transmission with a minimum six inch overlap where it is fastened.
Turbocharger: The turbocharger is limited to a stock-appearing, OEM/Factory make-specific charger only. Turbochargers from different years in the same make may be interchanged. 6.4 liter Powerstroke engines may utilize the factory twin-turbo configuration.
Water Injection: Water injection is prohibited. All system components must be removed from the truck.
Wheelbase: The vehicle must retain the original factory wheelbase and track width.
***We reserve the right to bump any truck up a class if the track officials deems it fit.***
2.5 Diesel Truck Class
8000lb Maxium Weight
Designed full bodied, four wheel drive pickup
trucks. With a wide variety of performance upgrades.
Ballast:Ballast is permitted. Front hanging weight is permitted. No weights permitted in the cab
of truck. No more than 60 in. from center of front axle.
Batteries:The Batteries must be securely mounted can be in anywhere, but if in cab must be covered completely.
Body: The body must be the OEM truck body including the full bed floor. The body must retain full sheet metal. Metal aftermarket hoods are permitted. Fiberglass hoods must be shielded on the underneath side with sheet metal or aluminum skin a minimum of .060 thick.. The hood must be closed and securely latched while the truck is hooked to the sled. The complete OEM firewall and complete OEM floor pan is mandatory. A factory installed pickup bed or commercial aftermarket bed must be installed.
Brakes: Front wheel hydraulic brakes are mandatory and functional.
Chassis: 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.
Cooling System: Radiators must be in stock location.
Compressed Gases: Use of any compressed gases is prohibited. (Nitrous or propane or any other)
Driveline: An OEM transmission and transfer case are mandatory. They must have been an option on a one ton or smaller pickup but can be used in location.
Drive Shaft Loops: Any U joint that is visible from the side of the truck must be shielded to contain the Ujoint and end of the shaft. Recommended to be at least six inch wide u-joint shields around the rear u-joint constructed of at least ¼ 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.
Driver Restraint System: The OEM restraint system is mandatory and must be worn.
Engine: The engine is limited to a stock appearing, OEM compression engine, available from the factory in a one ton or smaller truck. Cubic Inch limit of 444 CI. Water pumps may be electric or factory. Electric cooling fans are permitted.
Exhaust: All vehicles must be equipped to direct exhaust upward. The exhaust must exit rearward of the driver’s compartment. Stacks exiting through the hood or fender wells are prohibited. If the muffler or catalytic converter have been changed from stock, two (2) 3/8 inch diameter bolts must be installed through exhaust pipe in a cross pattern within one (1) inch of each other and as close to the turbo as practical. This will be teched. Bolt heads welded to the pipe, or sheet metal screws to mimic this will be grounds for disqualification.
Fire Extinguisher System: A fire extinguisher system is permitted, it must be securely mounted All vehicles are
recommended to have at least a 2 ½ lb extinguisher with working gauge securely mounted within drivers reach.
Fuel: The fuel must be pump #1, #2 diesel, or Soy/Biodiesel. Must be commercially available fuel. Fuel cells may be used in place of regular fuel tank, but must be mounted in factory location or in truck bed.
Fuel Injection Pump: The fuel injection pump is limited to cylinder number specific (I.E. 6 cylinder pump on 6 cylinder motor). The use of multiple high pressure common rail fuel pumps or HPOPs are permitted. The P pumps that are allowed are the p3000 and the p7100. Ag governors are allowed. No Sigma or 12 cylinder pumps allowed.
General Rules: All vehicles/drivers must comply with general rules.
Harmonic Balancer: All engines turning more than 4500 RPM must be equipped with a harmonic balancer or dampener meeting SFI Spec 18.1.
Hitch: The hitch may be a receiver style hitch, reinforcements are permitted. Trick hitches will be determined by the Tech Official. The hooking point must be the rear most point on the vehicle and must be rearward of the stock location of the tailgate. The hitch must be horizontal to the ground and stationary in all directions. Bumper may be notched or removed. The hitch’s height from the ground may not exceed 24 inches. The hooking point must have a minimum of 3inch by 3 ¾ inch inside opening for the sled hook. The hooking point must be a minimum of 44 inches from the center of the rear axle to the hooking point. The hooking point will be where the hook touches metal. That is the hooking point. May have drawbar type hitch. No part of the hitch can be above the frame rails.
Intercoolers: Only air to air intercoolers are allowed. No types of water to air coolers, no spray bars or water injection allowed. No individual runner intakes manifolds allowed. (Example ZZ custom)
Kill Switches: All trucks are required to have kill switch located on the back of the truck, located near the hooking point. On trucks with an electric injection fuel pumps it must have an electric shut off or disconnect for the injection pump on the back of the truck. For trucks with manual injection pumps they must have an air guillotine of the spring loaded type, no butterfly type to kill the air intake to the engine. It is recommended to have an air shut off on all trucks.
Rear End: Non OEM rear-end housings are prohibited. The rear end housings must have been for a one ton or smaller pickup pick up. Rear axle bolts must be covered by a cap or shield.
Safety Equipment: All drivers must wear a helmet, and a SFI 3.2a approved fire jacket and long pants, not necessarily fire suit pants.
Steering: The vehicle must retain the full, original OEM steering gear box. Additional stabilizers are permitted. Non OEM power assist methods are permitted.
Suspension - Front: The factory suspension configuration must be retained. The upper mounting point for strut assemblies must be in factory location. Adjustable caster/camber pillow ball mounts are permitted. The lower control arm may be strengthened provided factory mounting points are maintained. The lower mounting point for the strut assembly may be modified for improved caster and camber. Strut tower braces, lower tie bars, sway bars, and limit straps are permitted. Traction bars and devices are permitted. Air shocks are prohibited. Final decisions rest with LTTP official.
Suspension - Rear:
An OEM style rear end is mandatory. Traction bars and devices are permitted, and welds are permitted for attachment to the frame or axle housing. The rear suspension may be solid. Air bag spring assist and air shocks is prohibited. Final decision rest with LTTP official.
Tires: The tires must be DOT street tires. 35 inch max. Cut tires are prohibited. No chains or studs.
Transfer Case: Non - OEM transfer cases are prohibited. It must have been an option on a one ton or smaller pick up truck.
Transmission - Automatic: 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 shifter must be equipped with a spring-loaded positive reverse lockout device to prevent the shifter from accidentally being put into reverse. A functional neutral safety switch is mandatory. Vehicle must not start in gear. All transmission lines must be metallic or high pressure type hose. All vehicles with engines
running 4500 RPM or more and 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 engine block and extend rearward to the transmission with a minimum of six (6) inch overlap where it is fastened. All non-blanket shields must
incorporate two,(or one per manufactures instruction) ¾ 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 with engines running 4500 RPM or more and 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.
Transmission - Manual: Non - OEM transmissions are prohibited. A clutch meeting minimum SFI Spec1.1 or 2.1 is mandatory on all engines running 4500 RPM or more. All manual transmissions must be clutch assisted. Sequential shifters are prohibited. All vehicles with engines running 4500 RPM or more and 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 blankets that completely cover the bell housing. It must be attached to the rear of the engine block and extend rearward to the transmission with a minimum of six (6) inch overlap where it is fastened. All transmissions or clutch pedals will have a safety interlock switch so that vehicle will not start in gear.
Turbocharger:
T-4 mounting flange is the largest allowed. Turbos must be a true 2.5 charger. No clipped wheels or step down covers. Billet compressor wheels are allowed. A single .200 inch MWE groove maximum allowed It must be in the neck of inducer bore behind face of the wheel in 2.5 area ,no forward facing MWE grove. Inducer bore must be non-removable. All air must go through the 2.5 inducer bore and the MWE groove. The wheel must protrude into the 2.5 bore 1/8 inch. Turbo will be checked with a 2.550 plug or internal calipers. Throat area of compressor cover may not exceed 5.5 inch diameter. The 6.4 Power Stroke engine may utilize the factory twin turbo configuration.
The driver will be responsible for making turbo accessible for tech personnel to measure and inspect. If you
have any questions regarding turbo rule contact LTTP Staff
In addition to the above rule, competitors may run a 2.6 Smooth Bore Turbo instead of the 2.5 turbo.
Water Injection: Water injection is prohibited. All system components must be removed from truck.
Wheelbase: The vehicle must retain the original factory wheel base and track width. Cab and chassis trucks may not exceed 172 inches center to center of axles. Front dual-wheel spacers may be used only with accompanying positive-offset dually style wheels.
Outlaw Diesel Truck
The vehicle may be two or four-wheel drive.
8200lb Outlaw Diesel class
REGULATIONS:
Ballast: Ballast is permitted. Hanging weights may not extend more than 60 inches from the centerline of the front axle.
Credentials: All drivers must have a valid state drivers license.
Driver Restraint System: The OEM restraint system is mandatory and must be worn.
Driveshaft Loops: All trucks must have at least six inch wide u-joint shields around the rear ujoint constructed of at least _ 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.
Fuel: The fuel must be pump #1/#2 diesel only. Soy/Bio-diesel fuel is permitted. Off-road diesel fuel is prohibited.
Harmonic Balancer: All engines turning 4500 RPM and higher must be equipped with a harmonic balancer or damper meeting SFI Spec 18.1.
Hitch: The hitch’s height from the ground may not exceed 26 inches on 4wd units and 30 inches on 2wd units. The hooking point must have a minimum 3.750-inch inside diameter opening for the sled hook. The hooking point will be measured to the center of the clevis loop.
Interior: Open
Rear End: Rear axle bolts must be covered by a cap or shield.
Steering: Open
Street Equipment: Open
Rear: Open
Tires: Open
Transfer Case: Open
Transmission, Automatic: Non-OEM transmissions are permitted. Aftermarket torque converters, valve bodies and internal components are permitted. Transmission brakes are permitted. 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 with engines running 4500 RPM or more and 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 tail housing with a minimum six-inch overlap where it is fastened. All non-blanket-type shields must incorporate two (or one, per manufacturers 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 with engines running 4500 RPM or more and 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.
Transmission, Manual: Non-OEM transmissions are permitted. Aftermarket internal components are permitted. A clutch meeting minimum SFI Spec 1.1 or 1.2 is mandatory on all vehicles with engines running 4500 RPM or more. All manual transmissions must be clutch assisted. Sequential shifters are prohibited. All vehicles with engines running 4500 RPM or more and 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 bell housing; it must be attached to the block and extend rearward to the transmission with a minimum six inch overlap where it is fastened.
Turbocharger: Open
Water Injection: Open
Wheelbase:Open