Class 12 1200 - 1299
Limited Open Wheel Vehicle
Limited Open Wheel Vehicle
Last Updated April 10, 2024
DEFINITION
Limited 4 wheel single and two seat vehicles with trailing arm front suspension. Limited engine.
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
Front Suspension
Front suspension limited to VW type-1 beam/trailing arm configuration.
Beam and trailing arms may be of any manufacture.
Spindles may be of any manufacture.
All dimensions are open.
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
VW type-1 air cooled engine with the following restrictions:
- Maximum two valves per cylinder.
- Single Seat vehicles limited to 1776cc maximum.
- Two seat vehicles limited to 1835cc maximum.
- One production automotive type carburetor with a maximum of two venturies.
Maximum venturi size is 42mm.
Low compression engine option
VW type-1 air cooled engine with a maximum compression of 9.0:1.
Single seat limited to 2110cc maximum.
Two seat limited to 2276cc maximum.
Bore and Stroke open.
Single Weber 44 IDF or EMPI HPMX 44 carburetor.
Maximum ventri size is 34mm.
Individual tube manifolds only. No plenum manifolds allowed.
Maximum intake runner tube size 1.750(1 3/4) inch OD.
OEM End Castings only, May be modified.
Any manufacturer VW head allowed.
Two(2) valves per cylinder.
Cam, valves, valve springs, and lifters are open.
Any non-roller rockers and rocker shafts allowed.
Ignition system open.
All engines must be mounted to the rear of the transmission.
TR25 ENGINE REPLACEMENT
TR26 TRANSMISSION
Open
TR27 THROTTLES
TR28 EXHAUST
TR29 DRIVE SHAFTS
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
Minimum weight 1500 pounds.
TR43 FLOORBOARDS
TR44 BUMPERS and HAZARDOUS PROTRUSIONS
TR45 MIRRORS
TR46 SKID PLATES
TR47 STORAGE
TR48 CHASSIS and BODY.
TR49 HOSES
TR50 IDENTIFICATION MARKINGS
Unlimited Off-Road Racing will assign race numbers.
