Open RWYB class...
Weight Class:
GASOLINE TRUCKS: 7500lbs DIESEL TRUCKS: 8300lbs
Weights may be adjusted by the officials during the season in order to keep the class competitive.
Weights:
Added weights are permitted. Hanging weights may not extend more than 60 inches from the centerline of the front axle. Any loss of ballast while hooked to the sled is cause for disqualification. No fuel or water may be added to the truck after it has crossed the scales.
Hitch:
The hitch must be stationary in all directions. The hitch's height from the ground may not exceed 26 inches. The length of the hitch measured from the center of the rear axle to the hitch point may be no shorter than 27% of the actual wheelbase of the truck. The area where the hook point is at must be free and clear of any obstructions. A truck may compete with a Reese style hitch or may pull from the bumper as long as it meets the 27% rule. The hooking point must have a minimum 3.75 inch inside diameter opening. No lever, pivot, axis or other types of ‘trick’ hitches are prohibited. No vertical hitches, all hitches must be 33 degrees or less parallel to the ground. A second hitch is not required in this class.
Throttle:
Either the normal foot throttle or an approved spring-loaded hand throttle will be permitted in this class.
Kill Switch:
All trucks should be equipped with a Kill Switch
Tires:
Maximum tire size for all trucks utilizing dual rear wheels will be 35 x 12.50R for both front and rear tires. Trucks utilizing single wheel for for rear of truck are allowed any factory OEM unaltered tire for both front and rear tires. All tires must be DOT street-approved tires with the DOT number made visible by highlighting so that officials can easily see the number. Any tire without a DOT number is prohibited. Cut tires are not permitted. Studded tires and chains are not permitted. Dual rear wheels are permitted in this class . All trucks in class including gas, must run DOT approved tires.
Engines:
Any Cast Iron OEM Block, or any Cast Iron OEM race or OEM reproduction performance block is permitted. The engine must be able to support a stock crank (although a stock crank is not required). Open headers are permitted. Any cast iron or aluminum or sheet metal intake is permitted. Unlimited engine swaps between or within manufacturers are permitted. The engine must be in the stock location compartment. The engine, if moved forward, must be behind the stock position of the front grill as intended by manufacturer. Grill position must be stock and may not be altered. If engine is moved forward, the rear (back) of the engine block must be a
minimum of twelve inches (12") behind the centerline of the front axle. Mini Trucks (S-10, Ranger, Dakota, etc.) are permitted to run V-8 engines - location to be the same as full-sized trucks.
GASOLINE ENGINES must be naturally aspirated – no superchargers or turbochargers. The use of a “split carburetor” will be permitted. The fuel may be any pump gasoline or any racing type gasoline. No cubic inch limits.
DIESEL ENGINES are restricted to 6 cylinder and 8 cylinder compression ignition engines. No cubic inch limits are in place. No Sigma fuel pumps. The fuel must be pump #1/#2 diesel only. Soy or Bio-diesel fuel is permitted. Diesel engines may use an unlimited size turbo charger(s) or unlimited number of turbochargers. A Diesel engine truck running without a muffler must have cross bolts installed in their exhaust system. All inline turbocharged engines must have one cable totally surrounding the engine block and head.
- The cable will be 3/8 inch diameter and lie between the 1st and 2nd cylinders.
- Cable must pass through the exhaust manifold port area.
- Cable must have a minimum of two clamps at all splices.
- Cable will have 4” to 6” inches of slack.
Master Cutoff – Diesel Engines:
A sled- and driver- operated spring loaded emergency air shut off is mandatory. The cable must terminate into a two inch diameter steel ring.
Fuel cutoff – Diesel Engines:
All trucks must be equipped with a driver operated fuel shutoff capable of blocking fuel flow to the injection pump. A three way dump valve is required.
Driveshaft Loops:
All trucks must have at least six inch wide u-joint shields around the rear u-joints constructed of at least 1/4 inch steel or 3/8 inch aluminum that will safely contain the u-joint and the ends of each shaft. In addition there will be at least one shaft loop in the middle of the drive 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.
Flywheel Shield:
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 bell housing may be used in place of the shield; it must be attached to the block and extend rearward to the transmission with a minimum six inch overlap where it is fastened.
Transmission, Manual:
After market transmissions and transfer cases are permitted. A clutch meeting minimum SFI Spec 1.1 or 1.2 is mandatory on all vehicles that are collecting points. All transmissions must be clutch assisted. Sequential shifters are prohibited.
Transmission, Automatic:
Aftermarket transmissions are permitted. 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, appropriately labeled as meeting SFI Spec 4.1 and extending from the rear of the block to front of tail housing with a minimum six inch overlap where it is fastened, is permitted. 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 and be covered by a flex plate shield meeting SFI Spec 30.1.
Fuels and additives:
Nitrous oxide is prohibited. Propane is prohibited. A water injection is allowed. Racing fuel is permitted but not oxygenated racing fuel such as VP113 & Q16. Fuel checks may be taken at any time by the officials
Exhaust:
The exhaust on a GASOLINE vehicle may exit downward at the back of the truck or directly out the back of the truck or straight up through the hood of the truck or straight up at the back of the cab. All DIESEL vehicles must be equipped so as to direct exhaust upward. Exhaust through the hood is permitted. Two 3/8 inch diameter bolts must be placed in a cross pattern within one inch of each other as close to the final turbo as is practical.
Driveline:
After market transmissions and transfer cases are permitted. Axle shields are required and will be .060” thickness in steel or aluminum. Shield shall not be mounted to axle ends or hub bolts. An access hole may be left open to allow locking in the hubs.
Suspension:
No suspension is required. A solid suspension is permitted. Lift Kits are acceptable.
Body & Frame:
The body must be the OEM truck body and OEM Frame with any OEM legal wheelbase. A wooden flatbed is permitted in this class pending previous approval from the tech official and will be subject to a weight handicapped. The approval must occur BEFORE the truck’s first hook. A Fiberglass body with working doors and complete firewall that seals the driver’s compartment is acceptable. Fiberglass body trucks will cross the scales at 7200 pounds.
Firewall:
The firewall is mandatory.
Floor:
The OEM floor pan, front to rear of cab area, is mandatory. Removable sections are permitted.
Batteries:
Batteries must be securely mounted; they may not be located in the driver compartment.
Helmet:
Driver must wear a helmet, Full faced in this class.
Firesuit:
In flip top bodied vehicles without a firewall or working doors, the driver will be required to wear an SFI approved suit.
Driver Restraint System:
The OEM restraint system is mandatory and must be worn.
