Restricted 2 wheel drive mid-size truck or SUV, limited to 4 cylinder engines.

DEFINITION

Restricted to 2 wheel drive. Vehicles must have a production appearing Mid-size Utility or Sports Utility body. Engines limited to approved sealed engines as supplied by American Off-Road Racing Championship engine suppliers. See American Off-Road Racing Championship builders list.

GENERAL REGULATIONS

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

TECHNICAL REGULATIONS

This class is a restricted class. All components will be considered restricted unless unrestricted 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

See TR1 in Car/Truck/Moto Technical Rules.

TR2 PROTECTIVE CLOTHING

See TR2 in Car/Truck/Moto Technical Rules.

TR3 EYE PROTECTION and DENTURES

See TR3 in Car/Truck/Moto Technical Rules.

TR4 HEAD AND NECK RESTRAINTS

See TR4 in Car/Truck/Moto Technical Rules.

TR5 FIRST AID KIT

See TR5 in Car/Truck/Moto Technical Rules.

TR6 EMERGENCY SIGNALING DEVICES

See TR6 in Car/Truck/Moto Technical Rules.

TR7 HORNS

See TR7 in Car/Truck/Moto Technical Rules.

TR8 REFLECTORS

See TR8 in Car/Truck/Moto Technical Rules.

TR9 FIRE SUPPRESSION EQUIPMENT

See TR9 in Car/Truck/Moto Technical Rules.

TR10 SURVIVAL SUPPLIES

See TR10 in Car/Truck/Moto Technical Rules.

SUSPENSION COMPONENTS

Maximum wheelbase is 114 inches, measured at spindle-to-spindle centerline at ride height.

Maximum track width is 85 inches outside of tire at the widest point.

TR11 SHOCK ABSORBERS and BUMP STOPS

Maximum 3” dia. 4 bypass allowed.

Maximum 2.5” coil over allowed.

TR12 SECONDARY SUSPENSION

See TR12 in Car/Truck/Moto Technical Rules.

TR13 WHEELS and TIRES

Wheels are open.

Tires restricted to Maximum 35-inch DOT.

TR14 FASTENERS

See TR14 in Car/Truck/Moto Technical Rules.

STEERING and BRAKE COMPONENTS

TR15 STEERING

See TR15 in Car/Truck/Moto Technical Rules.

TR16 BRAKES

Maximum rotor diameter 13 inches.

Maximum four piston calipers.

ELECTRICAL SYSTEM

TR17 IGNITION

ECU limited to Haltech, MEFI, Life Racing, Entrol. Other ECU’s may be approved on request.

TR18 BATTERIES

See TR18 in Car/Truck/Moto Technical Rules.

TR19 LIGHTS

See TR19 in Car/Truck/Moto Technical Rules.

TR20 STARTERS

See TR20 in Car/Truck/Moto Technical Rules.

FUEL SYSTEM

TR21 FUEL

See TR21 in Car/Truck/Moto Technical Rules.

TR22 FUEL TANKS

Fuel cells are mandatory. Maximum of 32 gallons.

TR23 FUEL FILLERS LINES, VENTS, and CAPS

See TR23 in Car/Truck/Moto Technical Rules.

ENGINE, TRANSMISSION and DRIVELINES

TR24 ENGINE and ENGINE DISPLACEMENT

2027 - GM ECOTEC 2.4 liter. No other engine shall be permitted without PRIOR approval by

Engine must retain all stock components, configurations and specifications as manufactured.

“As manufactured” and “stock configurations and specifications” refer to as manufactured

components from GM, stamped with the GM logo or associated factory part number. Alterations

to any component in any manner (physical, chemical, or other) shall not be permitted unless

detailed below:

• Aftermarket fasteners shall be permitted.
• Equivalent brand components to stock GM components may be substituted for the following components: Bearings, seals, spark plugs, oil filter, timing chain, and associated components.
• Maximum overbore is 0.010”.
• Aftermarket connecting rod Molnar part #CH5659JCB4-A are approved, any aftermarket steel connecting rod supplier may apply for approval.
• Aftermarket pistons are permitted to maximum overbore of .010
• Pistons must retain OEM sizing and dimensions (except overbore). This includes ring land and wrist pin height, as well as piston dome dimensions.
• Maximum compression ratio is 10.75:1. (Allows for head and block cleanup during rebuild).
• Compression ratio may be checked at any event prior or post-race.
• Modifications to the stock engine block to allow for external oil filters/coolers are permitted.
• All internal components must be in place and be operational at all times (i.e. stock balancer shafts and drive). (2028 TBD)
• GM injectors only.

Engines must be sealed by one of the approved engine builders.

Any missing or altered engine seals will result in a DQ and possible ban.

Engine seals may be inspected pre-race and/or post-race.

TR25 ENGINE REPLACEMENT

See TR25 in Car/Truck/Moto Technical Rules.

TR26 TRANSMISSION

Turbo 350 manual valve body transmissions only.

Aftermarket bell housing and cases allowed.

Maximum 3 forward gears.

No underdrives allowed.

No overdrives are allowed.

Solid axle rear (Ford 9” aftermarket platform only)

Gear ratio limited to 7.00:1 maximum Gear ratio may be checked pre-race and/or post-race. Maximum 40 spline axle.

TR27 THROTTLES

See TR27 in Car/Truck/Moto Technical Rules.

TR28 EXHAUST

Open.

TR29 DRIVE SHAFTS

See TR29 in Car/Truck/Moto Technical Rules.

TR30 FLYWHEEL SHIELDS

See TR30 in Car/Truck/Moto Technical Rules.

TR31 FLUID COOLERS

See TR31 in Car/Truck/Moto Technical Rules.

TR32 AUXILIARY EQUIPMENT

See TR32 in Car/Truck/Moto Technical Rules.

TR33 SUPERCHARGERS and TURBOCHARGERS

See TR33 in Car/Truck/Moto Technical Rules.

VEHICLE SAFETY EQUIPMENT

TR34 ROLL CAGES

See TR34 in Car/Truck/Moto Technical Rules.

TR35 SAFETY HARNESS

See TR35 in Car/Truck/Moto Technical Rules.

TR36 SAFETY NETS

See TR36 in Car/Truck/Moto Technical Rules.

TR37 SEATING

See TR37 in Car/Truck/Moto Technical Rules.

GENERAL VEHICLE COMPONENTS

TR38 DRIVERS COMPARTMENT

See TR38 in Car/Truck/Moto Technical Rules.

TR39 DOORS AND LATCHES

See TR39 in Car/Truck/Moto Technical Rules.

TR40 FIREWALLS

See TR40 in Car/Truck/Moto Technical Rules.

TR41 BALLAST

See TR41 in Car/Truck/Moto Technical Rules.

TR42 WEIGHT

Minimum weight 3000 pounds.

TR43 FLOORBOARDS

See TR43 in Car/Truck/Moto Technical Rules.

TR44 BUMPERS and HAZARDOUS PROTRUSIONS

See TR44 in Car/Truck/Moto Technical Rules.

TR45 MIRRORS

See TR45 in Car/Truck/Moto Technical Rules.

TR46 SKID PLATES

See TR46 in Car/Truck/Moto Technical Rules.

TR47 STORAGE

See TR47 in Car/Truck/Moto Technical Rules.

TR48 CHASSIS and BODY

Must maintain a production appearing Mid-size utility or sports utility body.

Stock appearing grill and headlight opening must be retained.

No carbon fiber body parts, including wet layup using carbon cloth.

Body subject to American Off-Road Racing Championship approval.

TR49 HOSES

See TR49 in Car/Truck/Moto Technical Rules.

TR50 IDENTIFICATION MARKINGS

American Off-Road Racing Championship will assign race numbers.

TR51 ADVERTISING on VEHICLES

See TR51 in Car/Truck/Moto Technical Rules.

TR52 RADIO EQUIPMENT

See TR52 in Car/Truck/Moto Technical Rules.

TR53 WORKMANSHIP

See TR53 in Car/Truck/Moto Technical Rules.

TR54 TRACKING DEVICE

See TR54 in Car/Truck/Moto Technical Rules.