Mud Drag Info

Overview

This class is intended for four wheel drive trucks and Jeeps that are primarily street driven, have minimal modifications and are street legal. Engine swaps allowed as per class rules, frame must be correct for body. Vehicles must meet all safety requirements for this class. (See General Rules)

Body

1) Any model jeep or truck, stock steel body (minimal trimming allowed for tire clearance only)
2) Wheel base must be stock for frame and body
3) Firewall cannot be cut, relocated or reshaped
4) Must retain factory floor pan
5) Flatbeds – Minimum dimensions: must be the same width as the cab and extend to the rear most part of the frame and Substantial enough to carry cargo.
6) Must retain all stock glass
7) Headlights and taillights required and must be functional
8) Front bumper required
9) Factory interior shall not be removed.

Chassis

1). Unmodified OEM factory frame bumper to bumper2).
2) Minimum 4 point roll cage required for open top vehicles (NHRA specification/guidelines recommended)
3). Suspension must be stock, Aftermarket lift kits allowed
4) No removal of leaf springs
5) Stock OEM front and rear differentials, transmission and transfer case only (may be upgraded with stronger OEM parts).
6) Transmission brakes (trans brake) NOT allowed
7) Fuel tank, battery and radiator must be in stock location
8) 4 wheel brakes mandatory, OEM dual reservoir master cylinder required
9) Unaltered DOT tires only.

Engine

1). Motor must pull 17 “ of vacuum at 800 RPM’s
2). Big block engines in full size trucks only
3). No V8’s in mini trucks or mini SUV’s (Unless OEM)
4). Motor must be located in stock location.
5). No aluminum engine blocks or aluminum heads (Unless originally OEM equipped)
6). Carburetion – Single gas carburetor only, limited to 4150 / 4160 series only (no Predators, Dominators, SV-1’s)
7). OEM fuel injection only
8). Cast aluminum intake only (no tunnel rams or sheet metal intakes)
9). No power adders. No Nitrous, No turbocharger(s), No superchargers. With the following exceptions: a). Factory installed OEM turbochargers permitted on diesels only.
10). Headers are allowed, mufflers are required and exhaust must extend to behind the driver’s seat.

Overview

This all motor class is intended for four wheel drive trucks and Jeeps that have been slightly modified for competition but still utilize mostly stock components. They must be capable of being made street legal. Engine swaps allowed, but frame must be correct for body.Vehicles must meet all safety requirements for this class. (See general rules).

Body

1) Any model jeep or truck, stock steel or OEM (street weight) equivalent fiberglass body parts. (minimal cutting allowed only for tire clearance) No race bodies allowed.
2) Must retain Full steel cab or tub, doors and bed must be retained. (No removal of inner steel panels)
3) Firewall can be reshaped minimally, but not cut and relocated
4) Wheel base cannot be altered, must match body.(No body swaps).
5) Flatbeds – Minimum dimensions: must be the same width as the cab and extend to the rear most part of the frame and Substantial enough to carry cargo.
6) Must retain stock glass
7) Headlights and taillights required and must be functional
8) Front bumper required
9) factory interior shall not be removed.
10) Race seats permitted, must have a minimum of two (2) seats and must be securely mounted to the floor.

Chassis

1) Any unmodified OEM factory frame bumper to bumper. Frame shall retain two (2) stock cross members with the following exceptions permitted: a). Relocating of cross member(s) allowed, Modifications allowed.
2) Minimum 4 point roll cage required for open top vehicles NHRA specification/guidelies recommended)
3). Rear suspension must be leaf-spring unless equipped otherwise from the factory.
4) Front suspension may be leaf-spring, coil & radius, or IFS. Other front suspension styles permitted if OEM for that vehicle. (Relocation of mounting points not permitted).
5) Must have a minimum of two leaf per spring pack (front or rear)
6) Ladder bars permitted (No 4-link, no 3-link, no floaters, no coil over shocks).
7) Any OEM front and rear differentials.
8) Any stock OEM transfer case allowed (No chain drives allowed)
9) Any OEM Transmission (modifications and trans brakes allowed). Should be shielded, stock steel floor acceptable. (see General Rules).
10) Radiator must be located in front of motor
11) Fuel tank (fuel cell allowed) and battery may be relocated (see general rules).
12) 4 wheel brakes mandatory, OEM dual reservoir or duel master cylinder required.
13) Maximum 46.5” unaltered DOT tires.

Engine

1) Engine must pull 10“ of vacuum
2) Big block engines in full size trucks & jeeps (engine swaps permitted).
3) Engine must be located in approximate stock location. (Firewall will dictate engine location).
4) No aluminum engine blocks or (unless OEM equipped for that vehicle)
5) Single four barrel cast aluminum intake only. (No tunnel rams or sheet metal intakes)
6) Carburetion – Single gas carburetor only, limited to 4150 / 4160 series only.
7) OEM fuel injection only
8) No power adders. No Nitrous, No turbocharger(s), No superchargers.With the following exceptions:a). Factory installed OEM turbochargers permitted on diesels only.
9). NO Open headers are allowed for competition
10) Tech has final approval

Overview

This all motor class is intended for four wheel drive trucks and Jeeps that have been modified for competition but still utilize mostly stock OEM components. Although they are primarily competition vehicles and need not be street legal, they should appear stock. Engine swaps and body swaps are allowed as per class rules.

Body

1). Any model jeep or truck, stock steel body or OEM (street weight) equivalent fiberglass body parts required (No Race Bodies, fiberglass replacement parts should closely match the OEM specifications in design).
2). Body should match wheelbase. (No altered wheel base vehicles allowed).
3). Shall retain Full cab or tub. Doors and bed shall be retained. (No removal of inner steel structures) With the following exceptions:
3a). Tailgate may be removed. Front fender wells may be removed.
3b). Removal of inner steel structures is allowed on Front fenders and hood only.
3c). Fender cutting / trimming permitted for tire and header clearance.
3d). Firewall may be modified for engine clearance only (but not replaced or relocated). Engine should remain in stock OEM location.
4). Shall retain factory floor pan. Floor pan or tub shall Not be removed, replaced or relocated. (Floor may be modified for drive train clearance).
5). Flatbeds – Minimum dimensions: Should be the same width as the cab and extend to the rear most part of the frame and Substantial enough to carry cargo.
6). Windshield and side glass required (Lexan or equivalent acceptable). Rear window may be removed for roll cage/bar clearance.
7). Headlights and tail lights not required.
8). Bumpers not required.
9). Mirrors not required.
10). Removal of OEM interior trim pieces allowed (i.e.) seat, headliner, carpet, except door trim pieces may be removed. (No removal of inner steel structures / panels allowed).
11). Race seat(s) allowed, with the addition of a SFI approved 4 point safety harness. (5 point harness is recommended).
12). Driver shall sit in stock location. (Center seat positions NOT permitted).

Chassis

1).Any unmodified OEM factory frame or frame rails bumper to bumper. Shall retain two
2) stock cross members, (Relocating of cross member(s) allowed, Modifications allowed). Unused brackets and cross members may be removed at the discretion of the builder.
2). A 6 point roll cage is required. (NHRA specification/guidelines recommended). (See general rules).
3). Rear suspension must be leaf-spring unless equipped otherwise from the factory.
4). Ladder bars allowed. (No 3-link, No 4-link suspensions).
5). Front suspension may be OEM leaf-spring, coil & radius, or IFS. (Other front suspension styles permitted if OEM for that vehicle).
6). NO Coil over shocks(except as helpers, one leaf spring minimum) OR Coil over suspensions.
7) Leaf-spring vehicles shall have at least one functional leaf spring per spring pack. Floaters/Sliders are permitted.
8) Any OEM front and rear differential (axles) allowed. (Modifications allowed).
9) Any OEM transfer case allowed. (Modifications allowed).
10) Any OEM Transmission (modifications and transmission brakes allowed). Should be shielded, Stock steel floor acceptable (See general rules).
11) Fuel cell, battery,Radiator may be relocated;
12) Brakes are required on both front and rear axles , duel master cylinder or OEM style dual reservoir master cylinder required. NOTE: 4 wheel brakes are highly recommended. (See General Rules).
13) Maximum 46.5” unaltered DOT tires.
14) Minimum weight with driver:
14a). Big block equipped vehicles – 3,600 lbs.14b). Small block equipped vehicles – 3,300 lbs.

Engine

1).Any factory OEM type automotive engine. No aluminum blocks allowed, with the following exception:
1a). OEM factory installed aluminum engines.
2). Engine must be located in approximate stock location based on firewall location. #1 cylinder must be inline or in front of axle tube
3). Conventional OEM style aftermarket aluminum heads allowed (modifications allowed).
4). NO aftermarket Pro-Stock style heads permitted. (No Chevy Big Block spread port style heads. No Ford C-heads or Thor heads permitted).The following exceptions will be allowed:
4a) Ford A-460 type heads are allowed.
4b) Any aftermarket OEM type small block aluminum head allowed.
5). Cast aluminum intake only (No tunnel rams or sheet metal intakes)
6). Single gas carburetor only (No stretched or split Dominator carburetors). Single Predator or SV-1 carburetor allowed.
7). OEM fuel injection only.
8). Vacuum pumps and dry sumps allowed.
9). Fuel limited to race Gas or any pump gas (E-85 allowed) or diesel fuel only. No Alcohol, No ethanol No fuel additives or outlaw (oxygenated) fuels (i.e. Super Blue, Q-16, etc).10). , No turbocharger(s), No superchargers. With the following exceptions:
10a). Factory installed OEM turbochargers permitted on diesels only. (no Programmers allowed)
11). Open headers are allowed.
12). Tech has final approval
13) Nitrous Oxide allowed on small blocks under 400 cu

Overview

Pro Stock is a naturally aspirated class intended for highly modified four wheel drive trucks and Jeeps. Competition chassis, race bodies and Pro Stock style engines. Vehicles must meet all safety requirements for this class. (See general rules).

Body

1). Any model jeep or truck body allowed – must be recognizable. a). Fenders, doors and roof must be retained if originally OEMequipped. b). No narrowing of the body from the back of cab or tub (Driver Compartment) forward.
2). Narrowing or bobbing of rear quarter panels allowed for tire clearance using the following guidelines.
2a). if narrowed (panels between the tires) panels must extend to the end of the frame.
2b). If Bobbed rear quarter panels must extend a minimum of 12″ behind the cab,
3). Body and grill must extend to and cover all front engine components.
4). Maximum distance from the center of the front axle to the bottom of the (drivers) seat back shall not exceed 84inches. Center seat allowed.
5). A firewall and floor pan must be present protecting driver from engine and driveline components. Minimum 0.030 Steel or 0.060 aluminium required.
6). The firewall shall extend from door to door and from the floor pan to the base of the windshield.
7). The floor pan shall extend from door to door and front of the cab or tub to rear of the cab or tub (drivers compartment). NOTE: the floor pan and firewall shall be securely attached to each other and to the frame work of the chassis.
8). Windshield, Rear and side window glass and related hardware – Not required.
9). Race seats allowed

Chassis

Chassis material shall meet minimum requirements. (See General Rules). However these are minimum standards and do not imply nor guarantee a drivers or vehicles safety.
1).The main frame rails of the chassis shall be constructed of a minimum of 0.080” square steel tubing. Minimum dimensions of 2” X 3” or any Factory frame or frame rails.
Additional frame guidelines:
1a). Minimum length of frame rails shall be from centreline of front axle to centreline of rear axle.
1b). Round tube can be used for additional bracing.
1c). Back half chassis allowed.
2). Minimum 8 point roll cage (NHRA specification/guidelines recommended)
3). Any type suspension allowed.
4). Any type OEM or aftermarket chain or gear drive transfer set ups allowed
5). Any type Transmission allowed. modifications allowed (automatics must be shielded or SFI case)
6). Any OEM style front and rear differentials allowed. Modifications allowed.
7). 4 wheel brakes mandatory, duel master cylinder or OEM style dual reservoir master cylinder required.
8). Fuel cell, radiator and battery may be relocated (must meet General rules).
9). Maximum 46.5” DOT tires only.
10). Maximum wheelbase 130”.
11). Minimum weight with driver: a). 3,000 lbs. For big block equipped vehicles, b). 2,700 lbs. For small block equipped vehicles.

Engine

1). Any OEM type automotive engine. (No aluminum blocks allowed, with the following exception: a). small block aluminum blocks are allowed..
2). Engine placement – engine shall be relocated a maximum of 12 inches back from the centerline of the front axle tube to the #1 sparkplug.
3). Any automotive type of cylinder head allowed.
4). OEM fuel injection only
5). Any automotive type carbureted intake manifold allowed (sheet metal intakes allowed
6). 1 – 4 barrel carburetor allowed (split and stretched Dominators allowed, Predators or SV-1’s allowed).
7). Vacuum pumps and dry sumps allowed
8). Pump gas or Racing gas fuel only (no alcohol/methanol, ethanol allowed).
8a) Nitrous Oxide allowed.
9). No artificial aspiration. Ie; turbochargers or superchargers.
10). Competition exhaust allowed.

Overview

This class is intended for highly modified 4 wheel drive vehicles allowing tube chassis, any engine location and aluminum engine blocks. These vehicles need not resemble any factory produced vehicle. Entry Fee $75 per driver (1 driver allowed)

Body

1) A body is required. It can be constructed from metal, fiberglass or plastic and can be any design
2) A firewall and floorpan must be present protecting driver from engine and driveline components

Drivetrain

1) Chassis material, design and workmanship must meet safety requirements and tech approval
2) Rear engine vehicles roll cage must provide adequate protection to driver legs
3) Any type suspension allowed
4) Vera Trac and similar tires are acceptable on front
5) Dual independent master cylinder brake system required
6) Four independent wheel brakes required
7) Maximum wheelbase 150″
8) Minimum weight with driver and power adders 2450 big block, 2150 small block.

Engine

1) Any automotive type engine acceptable (aluminum blocks allowed)
2) Multiple carbs, Injection and Nitrous allowed (no blowers or turbos)
3) Gas or Alcohol only. No nitro methane or similar fuel accelerators
4) Any safely constructed competition exhaust allowed

**Vehicle must meet all safety requirements.

Overview

This class is intended for highly modified 4 wheel drive vehicles allowing tube chassis, any engine location, aluminum engine blocks and super chargers. These vehicles need not resemble any factory produced vehicle. Entry Fee $75.

Body

1) A body is required. It can be constructed from metal, fiberglass or plastic and can be any design
2) A firewall and floorpan must be present protecting driver from engine and driveline components.

Drivetrain

1) Chassis material, design and workmanship must meet safety requirements and tech approval
2) Rear engine vehicles roll cage must provide adequate protection to driver legs
3) Any type suspension allowed
4) Maximum 46.5″ DOT tires with alterations (Cuts) allowed
5) Vera Trac and similar tires are acceptable on front
6) Minimum weight with driver and power adders 2450 big block, 2150 small block. Minimum weight with driver and no power adders 2150 big block, 1850 small block.
7) Dual independent master cylinder brake system required
8) Four independent wheel brakes required
9) Maximum wheelbase 150″

Engine

1) Any automotive type engine acceptable (aluminum blocks allowed)
2) Blowers, Turbo Chargers, Injection, Multiple carbs, and Nitrous allowed
3) Gas or Alcohol only, no nitro methane or similar fuel accelerators
4) Any safely constructed competition exhaust allowed
5) Blower restraints and belt shield required. Blower and hat blanket and fuel line shield highly recommended

**Vehicle must meet all safety requirements.

Overview

This class is intended for highly modified 4 wheel drive vehicles allowing tube chassis, any engine location, aluminum engine blocks and super chargers. These vehicles need not resemble any factory produced vehicle.

Body

1) A body is required. It can be constructed from metal, fiberglass or plastic and can be any design
2) A firewall and floor pan must be present protecting driver from engine and drive line components.

Drivetrain

1) Chassis material, design and workmanship must meet safety requirements and tech approval
2) Rear engine vehicles roll cage must provide adequate protection to driver legs
3) Any type suspension allowed
4) Paddle tires or maximum 46.5″ DOT tires with alterations (Cuts) allowed
5) Minimum weight with driver and power adders 2450 big block, 2150 small block. Minimum weight with driver and no power adders 2150 big block, 1850 small block.
6) Dual independent master cylinder brake system required
7) Four independent wheel brakes required
8) Maximum wheelbase 150″

Engine

1) Any automotive type engine acceptable (aluminum blocks allowed)
2) Blowers, Turbo Chargers, Injection, Multiple carbs, and Nitrous allowed
3) Gas or Alcohol only, no nitro methane or similar fuel accelerators
4) Any safely constructed competition exhaust allowed
5) Blower restraints and belt shield required. Blower and hat blanket and fuel line shield highly recommended

**Vehicle must meet all safety requirements.