Class 12 1200 - 1299
Limited Open Wheel Vehicle

Limited Open Wheel Vehicle
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
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
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
See TR11 in Car/Truck/Moto Technical Rules.
TR12 SECONDARY SUSPENSION
See TR12 in Car/Truck/Moto Technical Rules.
TR13 WHEELS and TIRES
See TR13 in Car/Truck/Moto Technical Rules.
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
See TR16 in Car/Truck/Moto Technical Rules.
ELECTRICAL SYSTEM
TR17 IGNITION
See TR17 in Car/Truck/Moto Technical Rules.
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 cell mandatory.
TR23 FUEL FILLERS LINES, VENTS, and CAPS
See TR23 in Car/Truck/Moto Technical Rules.
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
See TR25 in Car/Truck/Moto Technical Rules.
TR26 TRANSMISSION/DIFFERENTIAL
Open
TR27 THROTTLES
See TR27 in Car/Truck/Moto Technical Rules.
TR28 EXHAUST
See TR28 in Car/Truck/Moto Technical Rules.
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 1500 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 TR26 in Car/Truck/Moto Technical Rules.
TR47 STORAGE
See TR47 in Car/Truck/Moto Technical Rules.
TR48 CHASSIS and BODY
See TR48 in Car/Truck/Moto Technical Rules.
TR49 HOSES
See TR49 in Car/Truck/Moto Technical Rules.
TR50 IDENTIFICATION MARKINGS
See TR50 in Car/Truck/Moto Technical Rules.
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.
2025 Mint 400
Brand | Category | Prize | 1st | 2nd | 3rd | Total | ||
---|---|---|---|---|---|---|---|---|
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MRT Tires | Tire Manufacturer | Cash | $300.00 | $200.00 | $100.00 | $600.00 | Requirements |