JerrodGlover
Pulling God
- Joined
- Jun 18, 2006
- Messages
- 2,122
Two-Six Class
The Two-Six class is designed for streetable pickup trucks (full-bodied diesel pickup
trucks). The vehicle must be four-wheel drive.
Weight breaks:
8000 lbs. 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 hood must be
closed and securely latched while the vehicle is hooked to the sled.
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 driver’s 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.
Driveshaft Loops:
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 ujoint
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.
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.
Exhaust:
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 as close to the turbo as is practical.
Fire Extinguisher System:
A fire extinguisher system is mandatory (minimum of 2.5 lbs. dry powder type) and must
be fully charged. It must be securely mounted and within reach of driver.
Firewall:
The complete OEM firewall is mandatory.
Floor:
The complete OEM floor pan is mandatory.
Fuel:
The fuel must be pump #1/#2 diesel only. Soy/Biodiesel fuel is permitted. Off-road
diesel fuel is prohibited.
Fuel Injection Pump:
The fuel injection pump is limited to a stock-appearing, OEM engine make-specific
pump only. Dual high-pressure common-rail fuel pumps or HPOPs are permitted. The
P7100 injection pump, if equipped, must utilize a stock-appearing governor.
Hitch:
The hitch must be a "Reese"-style hitch; reinforcements are permitted. 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. The hooking point must have a minimum
3.50 inch inside diameter opening for the sled hook. The hooking point will be measured
to the center of the clevis loop.
Intercoolers:
Air to air intercoolers only; water to air is prohibited.
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.
Nitrous Oxide:
Nitrous oxide is prohibited. No other oxygen extenders are allowed. All system
components must be removed from the truck.
Propane:
Propane is prohibited. All system components must be removed from the truck.
Rear End:
Non-OEM rear-end housings are prohibited. The rear end 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 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. Traction bars and devices are permitted; they
must be bolt on only; welds are permitted for attachment to frame or axle housing.
Control arms may be strengthened or replaced, provided all original mounting points are
retained. Strut tower braces, lower tie bars, sway bars, limit straps, and camber kits are
permitted. The rear suspension must maintain a minimum compression travel of one
inch. All rear suspensions must use at least one working shock absorber per wheel.
Tires:
The tires must be DOT street tires. Cut tires are prohibited.
Tow Vehicles:
Tow vehicles are prohibited.
Transfer Case:
Non-OEM transfer cases are prohibited. It must have been an option on a one-ton or
smaller pickup 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 springloaded
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 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 with engines running
4500 RPM or more and using an automatic transmission must be equipped with a
flex plate meeting SFI Spec 29.1 or 29.3 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 vehicle is limited to a single turbocharger; the inducer bore on the compressor
housing may be no larger than 2.65 inches measured at the smallest diameter area of
the compressor wheel. 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.
Water Injection:
Water injection is prohibited.
Wheelbase:
The vehicle must retain the original unaltered factory wheelbase and track width. Front
dual-wheel spacers may be used only with accompanying positive-offset dually-style
wheels.
**All final Technical Decisions are made by Thunder in Muncie Technical Staff.
The Two-Six class is designed for streetable pickup trucks (full-bodied diesel pickup
trucks). The vehicle must be four-wheel drive.
Weight breaks:
8000 lbs. 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 hood must be
closed and securely latched while the vehicle is hooked to the sled.
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 driver’s 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.
Driveshaft Loops:
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 ujoint
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.
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.
Exhaust:
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 as close to the turbo as is practical.
Fire Extinguisher System:
A fire extinguisher system is mandatory (minimum of 2.5 lbs. dry powder type) and must
be fully charged. It must be securely mounted and within reach of driver.
Firewall:
The complete OEM firewall is mandatory.
Floor:
The complete OEM floor pan is mandatory.
Fuel:
The fuel must be pump #1/#2 diesel only. Soy/Biodiesel fuel is permitted. Off-road
diesel fuel is prohibited.
Fuel Injection Pump:
The fuel injection pump is limited to a stock-appearing, OEM engine make-specific
pump only. Dual high-pressure common-rail fuel pumps or HPOPs are permitted. The
P7100 injection pump, if equipped, must utilize a stock-appearing governor.
Hitch:
The hitch must be a "Reese"-style hitch; reinforcements are permitted. 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. The hooking point must have a minimum
3.50 inch inside diameter opening for the sled hook. The hooking point will be measured
to the center of the clevis loop.
Intercoolers:
Air to air intercoolers only; water to air is prohibited.
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.
Nitrous Oxide:
Nitrous oxide is prohibited. No other oxygen extenders are allowed. All system
components must be removed from the truck.
Propane:
Propane is prohibited. All system components must be removed from the truck.
Rear End:
Non-OEM rear-end housings are prohibited. The rear end 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 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. Traction bars and devices are permitted; they
must be bolt on only; welds are permitted for attachment to frame or axle housing.
Control arms may be strengthened or replaced, provided all original mounting points are
retained. Strut tower braces, lower tie bars, sway bars, limit straps, and camber kits are
permitted. The rear suspension must maintain a minimum compression travel of one
inch. All rear suspensions must use at least one working shock absorber per wheel.
Tires:
The tires must be DOT street tires. Cut tires are prohibited.
Tow Vehicles:
Tow vehicles are prohibited.
Transfer Case:
Non-OEM transfer cases are prohibited. It must have been an option on a one-ton or
smaller pickup 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 springloaded
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 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 with engines running
4500 RPM or more and using an automatic transmission must be equipped with a
flex plate meeting SFI Spec 29.1 or 29.3 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 vehicle is limited to a single turbocharger; the inducer bore on the compressor
housing may be no larger than 2.65 inches measured at the smallest diameter area of
the compressor wheel. 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.
Water Injection:
Water injection is prohibited.
Wheelbase:
The vehicle must retain the original unaltered factory wheelbase and track width. Front
dual-wheel spacers may be used only with accompanying positive-offset dually-style
wheels.
**All final Technical Decisions are made by Thunder in Muncie Technical Staff.
getting ready to cancel 3 rooms at Lees Inn each with 2 beds....