Unlimited chassis and suspension truck or SUV with limited engine.

Last Updated April 10, 2024

DEFINITION

Unlimited 4 wheel vehicles. Vehicles must have a production appearing Utility or Sports Utility body. Engines limited to approved sealed engines as supplied by Unlimited Off-Road Racing engine suppliers. See Unlimited Off-Road Racing engine builders list.

GENERAL REGULATIONS

Entrants in this class shall comply with all applicable general regulations.

TECHNICAL REGULATIONS

This class is an open class and all components will be considered open unless restricted herein.

NOTE: The TR abbreviations listed under this class (I.E. TR1 HELMETS) refer to TR cross reference listings in the front of this book. These TR cross-referenced listings are part of the class rules. Where a conflict occurs between the TR cross-referenced listing and a rule contained under this class, the rule contained under this class takes priority.

SAFETY EQUIPMENT

TR1 HELMETS

TR2 PROTECTIVE CLOTHING

TR3 EYE PROTECTION and DENTURES

TR4 HEAD AND NECK RESTRAINTS

TR5 FIRST AID KIT

TR6 EMERGENCY SIGNALING DEVICES

TR7 HORNS

TR8 REFLECTORS

TR9 FIRE SUPPRESSION EQUIPMENT

TR10 SURVIVAL SUPPLIES

SUSPENSION COMPONENTS

TR11 SHOCK ABSORBERS and BUMP STOPS

TR12 SECONDARY SUSPENSION

TR13 WHEELS and TIRES

TR14 FASTENERS

STEERING and BRAKE COMPONENTS

TR15 STEERING

TR16 BRAKES

ELECTRICAL SYSTEM

TR17 IGNITION

TR18 BATTERIES

TR19 LIGHTS

TR20 STARTERS

FUEL SYSTEM

TR21 FUEL

TR22 FUEL TANKS

TR23 FUEL FILLERS LINES, VENTS, and CAPS

Fuel cell mandatory.

ENGINE, TRANSMISSION and DRIVELINES

TR24 ENGINE and ENGINE DISPLACEMENT

Engine must be a GM LS525/525RLB 6.2 Liter or a Ford Ecoboost 3.5 liter V-6. All engines must be sealed and supplied by a Unlimited Off-Road Racing approved builder (see approved engine builder list).

Power steering pump and alternator are open. Any stock oil pan may be used. Oil pan may be modified for fit. No dry sump. Pulleys and belts are open. Must use a stock production ecu. ECU may be reflashed. This is a sealed motor class and engine must be sealed by Unlimited Off-Road Racing before it is installed into vehicle.

If Unlimited Off-Road Racing at anytime during the racing season determines that any engine has an unfair advantage, we may equalize that engine either by a reduction in cc’s, restrictor sizing, turbo boost limits, etc. These changes may be required during the racing season.

TR25 ENGINE REPLACEMENT

TR26 TRANSMISSION

Must use turbo 400 transmission. Any aftermarket replacement case may be used. Any under drive may be used.

TR27 THROTTLES

Fly by wire throttle pedals may be used.

TR28 EXHAUST

TR29 DRIVE SHAFTS

Straight axle, front engine only.

TR30 FLYWHEEL SHIELDS

TR31 FLUID COOLERS

TR32 AUXILIARY EQUIPMENT

TR33 SUPERCHARGERS and TURBOCHARGERS

VEHICLE SAFETY EQUIPMENT

TR34 ROLL CAGES

TR35 SAFETY HARNESS

TR36 SAFETY NETS

TR37 SEATING

GENERAL VEHICLE COMPONENTS

TR38 DRIVERS COMPARTMENT

TR39 DOORS AND LATCHES

TR40 FIREWALLS

TR41 BALLAST

TR42 WEIGHT

TR43 FLOORBOARDS

TR44 BUMPERS and HAZARDOUS PROTRUSIONS

TR45 MIRRORS

TR46 SKID PLATES

TR47 STORAGE

TR48 CHASSIS and BODY

Must maintain a production appearing utility or sports utility body.

Stock appearing grill and head light opening must be retained.

Body subject to Unlimited Off-Road Racing approval.

TR49 HOSES

TR50 IDENTIFICATION MARKINGS

Unlimited Off-Road Racing will assign race numbers.

TR51 ADVERTISING on VEHICLES

TR52 RADIO EQUIPMENT

TR53 WORKMANSHIP

TR54 TRACKING DEVICE