MONTANA OFF-ROAD RACING ASSOCIATION  

2007 SAFETY RULES AND MINIMUM REQUIREMENTS 

                Compiled from Crandon International Off-Road Raceway/CORR 

Driver Controlled: 

A.      Helmets & Eye Protection:  All helmets must be Snell 90 certified or better.  A helmet shield or some type of goggles for eye protection is mandatory. 

B.      Fire Suits:  Driver must wear a manufactured fire resistant racing suit and the manufactures label must be intact.  The fire suit must fit well, provide full coverage and be in good and clean condition.  NOTE: Stock/Limited Classes are not required to wear a fire suit.  Long sleeve shirts, full length pants and shoes are required. 

C.      Brakes/Brake Lights:  Every vehicle will have to show that it can lock up at least two wheels.  See your class rules for Brake light/Running light requirements. 

Driver’s Area 

A.      Seats and Mounting:  Aftermarket racing seats are required for all classes.  All seats must be mounted to the roll cage to insure that the seat can’t break away from the belts/harness. 

B.      Harness and Mounting:  A five point racing style 3” lap and shoulder safety harness is mandatory.  All belts must be clean, in good and soft condition and cannot be sun bleached or fatigued.             

C.      Roll Cage and Gussets:  The roll cage must be of a six-point configuration.  Use a minimum of 1 ¾” tubing with .120 wall or .095 DOM Seamless. No square tubing.  Roll cage must consist of a rear loop, one front loop with interconnecting bars, two rear braces and one diagonal brace with two horizontal door bars to protect driver.  Door bars need to be placed high enough and low enough to protect driver, and additional bars are recommended.  Gussets may be installed.  If used, they must be installed at all welded main intersections.  Gussets must be at least 3” by 1/8” if float stock, or the same material as the tubing that they brace and 3” at longest point if made with notching cutter.  Welds must be of good quality with good penetration.  No grinding welds or using body filler around welds.  No brazing.  Roll cage must be at least 3 inches in any direction of driver’s helmet.  Cage bars must be padded anywhere a driver’s helmet may come into contact.  The cage must be securely mounted to the frame.  Body mounted cages must be bolted through and attached by using a sandwich method.  Cage bars ahead of firewall differ by class, so see specific class rules. 

D.     Switches:  Track workers must be able to find and turn off the ignition and all other components.  Switches must be labeled “ON” and “OFF”, etc. 

E.      Floor Boards and Fire Walls:  Floorboards and firewalls must be in good, solid condition with all holes and damage repaired better than original strength.  Vehicles without truck bed or trunks must build a rear firewall to protect the driver from fluids and/or flames which could come from the fuel cell, filler cap, fuel lines, etc.  The cowl area must be covered. 

F.       Fire Extinguisher:  A U.L. approved fire extinguisher must be either in the pit area or mounted in the vehicle.  Class requirements vary, so check your class. 

G.     Nets and Padding:  Driver’s side window net is required.  NO wire mesh is allowed.  All nets must be mounted securely to the doors and be accessible and detachable from the top or bottom. 

H.     Windshield Mesh/Screen and safety Bars:  All windshield mesh/screens must be strong enough to stop a softball-sized rock.  Mandatory safety bars must be installed in front of driver, securely mounted inside the windshield mesh, 10” on center, minimum of ½” tubing. 

I.        Flammable Material:  All flammable materials, such as carpeting, headliner, and unused seats must be removed. 

Engine Area 

A.      Fuel, Oil, and Water Lines:  Lines must have no leaks, and not in danger of abrasion from any moving parts.  It is strongly suggested that steel lines or braided lines be used for all fuel lines.  Secondary protection for any lines and tanks routed through the driver’s compartment is required. 

Front End/Rear End 

A.      Steering Linkage:  Must be in good working order.  Note:  Check your Class Rules. 

B.      Hubs and Axles:  Must be in good, safe condition without excessive wear. 

C.      Brakes and Lines:  No leaks allowed. Must have at least two wheels lock up.  Everything must be well mounted and in good condition.  Note: Check your Class Rules for shock configuration. 

D.     Drive Shaft Loop and Scatter Guard:  A drive line loop is required in all classes; scatter shield is required on manual transmission vehicles. 

General Vehicle Area 

A.      Fuel Tank and Mounting:  Check your Class Rules 

B.      Battery Mounting:  Battery must be securely mounted inside a containment box. 

C.      Car Numbers:  Numbers must be visible to officials.  Note: See your specific Class Rules. 

These rules are general safety rules.  Your class rules supersede these rules. 

Stock Class Trucks 

A two-wheel drive, standard size pickup, it must be a stock production vehicle that has been produced in quantities of at least 5000 for a one year period available for purchase by the public in the United States.  This is a production class and must maintain the engine, body and frame combination for a specified year.  All components must remain stock unless modifications are allowed by this rulebook.

Front and Rear Suspension 

Required:

A.    Stock suspension parts and locations must be maintained as delivered.

B.    Track width must be stock.

C.    Pivot points must remain stock and in stock locations.

D.    Travel limit in the front and rear – 12” measured metal stop to metal stop without anything in between.

Allowed:

A.   Stock spindles or replacement spindles with ¾ or 1 ton components.

B.   Stock lower A-Arm.  Any manufacture.  Stock length only.

C.   Any manufactured ball joint.

D.   Steel springs of any rating, any manufacture.  Stock length only.

E.    Replacing all/any rubber mounts with poly or other material.

F.    Two single point anti-wrap up bars attached on the differential.

G.   Stock sway bars only.

H.   Using of larger wheel studs or bolts.

I.     Rubber or poly bump stops.

J.     Reinforcing of parts with additional material but no modifications to the part.     

Not Allowed:

A.   Quarter elliptical springs.

B.   Shackles lengthened or moved from stock locations.

C.   Composite and/or fiberglass springs.

D.   Air bump shocks/stops.

Shocks

Allowed:

A.   Any non rebuildable shock.

B.   One shock per wheel.  

Not Allowed:

A.   Protruding through the hood or the fenders.

B.   Remote or reservoirs.

C.   Take apart shocks.

D.   Custom made shocks.

E.    Shocks in the driver’s compartment.

F.    Coil over shocks.

G.   Remote and/or cantilever shocks.

H.   Any kind of air shock.

I.     Position sensitive shocks.

J.     Shafts larger  than 5/8”

Steering

Allowed:

A.   Only stock steering box as original from the particular chassis.

B.   Tie rods, tie rod ends, and any ball and socket type.  All other steering must remain stock but can be reinforced.

C.   Any steering wheel but must remain within three inches of the stock location fore and aft.

D.   Stock steering pump internal modifications.

E.    Steering pump and reservoir of any manufacturer but must be belt driven.

F.    Steering quickeners.

G.   Chassis that originally have rack and pinion steering may use an aftermarket rack mounted in the approximate stock location.

Not Allowed:

A.   Changing of the original concept or location.

Brakes 

Stock brake equipment only.  No anti-lock systems, electrical or mechanical.

Allowed:

A.   Any brake pads or brake shoe material.

B.   Any master cylinder wheel cylinders as long as it bolts in place of the stock one.

C.   Any proportioning valve.

D.   Braided lines.

E.    Rear disc brakes, steel rotors and calipers only.

Not Allowed:

A.   Steering Brakes.

Ignition Systems

Allowed:

A.   Stock type single point or HEI ignition system.

B.   Spark must be activated through the distributor.

C.   Any control box.

D.   Any coil.

E.    OEM or direct replacement alternator only.

Not Allowed:

A.   Magnetos, direct fire and coil ignition systems.

Headlights

Required:

A.   Headlight openings must be covered with flat material.

B.   No glass allowed.

Fuel Cells

Fuel cells are recommended, but not required.

A.   No in cab fuel tanks.

B.   Cutting of the box floor to place the fuel cell is allowed.

Engine

Allowed:

A.   Engine must be in stock location on stock mounts for a V-8.

B.   One engine movement limiter.   –Cable, chain, etc.

C.   Strengthening of the motor mount brackets by additional material only.

Not Allowed:

A.   Any modification not specifically listed.

B.   Mounting plates.

Block and Crankshaft 

Approved standard OEM, as cast, iron production block.  Small blocks only.

Allowed:

A.   Blued printing and balancing.

B.   Using studs rather than bolts.

C.   Windage trays.

D.   High volume or pressure oil pump.

E.    Auxiliary engine oil cooler.

F.    Fan for oil cooler.

G.   Remote oil filters.

H.   Harmonic balancer open, any manufacturer.

Not Allowed:

A.   Any kind of modification specification not listed above.

B.   Crankshafts that have been undercut, knife edged or lightened.

C.   No dry sumps.

Cylinder Heads

Standard production as cast, iron heads that matches the block with casting numbers.

Allowed:

A.   Aftermarket valve springs provided the stock outside dimension is retained.

B.   Three angle valve jobs.

C.   Single 45 degree cut on the valve face.

D.   Valve guide material unlimited.

E.    Stainless steel valves.

F.    Screw in studs and guide plates.

G.   One breather per valve cover.

H.   Machining of head to accommodate valve size.

Not Allowed:

A.   Any modifications of the cylinder head not specifically listed above.

B.   Angle milling/cutting of the block or cylinder heads.

C.   Bowl cutting.

D.   Titanium or composite valves.

Cam and Lifters

Stock type cast flat tappet camshafts with a maximum valve lift as measured on the valve of.500.  Stock lifter bore size.

Allowed:

A.   Other cam grind specifications are unrestricted.

B.   Aftermarket direct replacement timing chain and gears.

 Not Allowed:

A.   Any modifications not specifically listed above.

B.   Roller mushroom type lifters.

C.   Full roller rockers of any manufacture.

D.   Gear or belt drive.

E.    Shaft type rocker unless OEM.

Intake Manifold

Allowed:

A.   As cast-Edelbrock intake.

B.   Match porting by the removal of material only, within the last ½” of the runner only.

C.   Addition of return water port in rear of intake manifold allowed.

D.   Machining of intake to match Vortec head.

E.    Open plenum or straight bore spacers and standard design gaskets only.

F.    Drilling of head to install intake allowed.

Not Allowed:

A.   Any other modification not specifically listed above.

B.   No devices between the carburetor and the intake manifold, designed to increase or redirect airflow will be allowed.

Exhaust

Allowed:

A.   Stock cast exhaust manifolds or down and under headers with a maximum tube size of 1.750 inches.

Not Allowed:

A.   Headers without collectors.

B.   Custom built headers.

C.   Exhaust system running through the driver’s compartment.

Radiator 

A.   Only one radiator.

B.   Must be in stock location.

C.   Must fit in the original opening.

D.   The mounting method can be changed or reinforced.

E.    OEM or direct replacement water pump only.

Carburetor

Allowed:

A.   Stock carburetor, 2 or 4 barrel.

B.   Fuel pump – mechanical only in the stock location.

Transmission – Drive Shafts

Allowed:

A.   Any internal modification.

B.   Any gears.

C.   Any conventional vane type converter, non-electrical.

D.   Transmission cooler – which may be relocated to the bed, but must remain within 12 inches from the bottom the cooler to the bed.

E.    One 360 degree solid steel bracket, no less than two inches wide and ¼” thick, must be placed around drive shaft.

 Differential 

Allowed:

A.   Any automotive or light truck production housing and third member rear axle assembly.

B.   Any gear ratio.

C.   Any axles.

D.   Aftermarket floater rear axles.

E.    Spool type differential only allowed.

Not Allowed:

A.   Knock off hubs.

B.   Quick change rear ends.

C.   Aluminum housings.

D.   No limited slip differential.

Seats

A.   Any manufacturer.

B.   Must stay in approximate factory stock location.

Interior

Required:           

A.   Removal of all upholstery, upholstery panels, headliners, carpets, plastic interior parts.

Allowed:

A.   Dash optional.

B.   The pedal assemblies must remain in the approximate stock location.

Not Allowed:

A.   Modifications of the interior panels except for installation of the interior cage construction.

Doors 

Required:

A.   Three horizontal bars of properly sized tubing, tied to the cage on each side.

Allowed:

A.   Stock location –non-operating, securely mounted!

B.   Removal of the window, window regulator hardware parts/pieces.

C.   OEM or exact duplicate outer panel of any material allowed.

D.   If anything other than steel panels is used, the plating of the left door bars will be required.  .075 aluminum or 16 gauge steel must be used.

Firewall

Allowed:

A.   Must remain stock.

B.   Repair of rust with equal thickness metal.

C.   The only modification allowed will be for the proper installation of cage construction.

Not Allowed:

A.   Any modifications.

 Floor Boards

Required:

A.   Must remain stock.

Allowed:

A.   Repair of rust with equal thickness metal.

Not Allowed:

A.   Any modifications or alterations.

Chassis 

Required:

A.   Factory installed chassis and body must be maintained for year specified.

Allowed:

A.   Strengthening of chassis and frame by adding material.

B.   Stock wheel base – plus or minus one inch.

C.   Shortening of long wheel base frame to match short wheelbase specs allowed.

Not Allowed:

A.   Removal of any cross members or any other materials.

Body 

Required:

A.   Stock mounts in original positions.

B.   Original size, shape, configuration and appearance.

C.   Stock grill assembly and/or aftermarket exact duplicate for the body/chassis year.

D.   Hood pins.

E.    Doors, hoods, and fenders must be in the factory original stock location.

F.    Complete removal of the hood latches.

G.   Heater core hoses must be disconnected.

Allowed:

A.   Stock mounts may be replaced with any material.

B.   Outer box sides may be bolted to the inner bed panels.

C.   Removal of the heater, air conditioning system, windshield wiper motor and linkage along with any excess wiring.

D.   Removal of the tailgate.

E.    General body bracing by additional material.

Not Allowed:

A.   Windshields.

B.   Shocks, radiators, transmission coolers, air filters and scoops protruding through the hood.

Fenders 

Required

A.   Must have complete box – the only holes allowed are for shocks or cage tubing with one inch maximum clearance.

B.   Rear inner fender panels.

Allowed:

A.   Enlargement of wheel openings for tire clearance with three inch cutout and two inch flare.

B.   Use of hoop for mounting fenders and radiator.  May have fiberglass rear fenders, must be from the factory i.e. fiberglass step side fenders.

C.   Outer box sides may be of any material but must be the exact duplicate of the OEM panels.

D.   Inner box must be OEM only.

E.    Front fenders may be of any material but must be the exact duplicate of the OEM panel.

F.    Inner front fender reinforcement may be removed.

G.   Outer parts only allowed, must be OEM or steel replacement.

Hood 

Allowed:

A.   Any material outer panel allowed but must be exact duplicate of OEM panel.

Tires and Wheels 

Allowed:

A.   Maximum tire size of 35 x 12.5 or approximate metric equivalent.

B.   DOT only, available to the general public.

C.   Wheel maximum width is 9 inches.

D.   Any steel wheel or one piece cast aluminum wheel.

E.    Maximum wheel size is 16 inches.

Not Allowed:

A.   Bead locks, bead liners and inner liners.

B.   Spun aluminum or magnesium.

C.   Three piece wheels.

Updating and pre-dating will be allowed where stock fitment is allowed.  Limited to body components that can be bolted on the change the models year’s appearance – i.e. 95 front clip on an 84 Chevy cab

Modified Truck Class Rules 

2008 

A two-wheel drive, standard size pickup, it must be a stock production vehicle that has been produced in quantities of at least 5,000 for a one year period and available for purchase by the public in the United States. 

Front and Rear Suspension:  Original concept of suspension and springs such as A-arm, leaf or coil springs must be used. 

            Allowed: 

A.      Stock suspension pieces from any vehicle in the same manufacturers series. 

B.      Any ball joint adaptations but only in stock locations. 

C.      Spindles may be aftermarket or modified but must be as heavy or strong as OEM. 

D.     Different spring rates or added springs and weight jacks.  Longer than stock, springs and shackles are allowed. 

E.      Reinforcement by plating, gussets, or other means. 

F.       Shock combinations and configurations are limited to 2 per wheel.  Reservoir shocks are allowed.  Driver must be shielded from shock explosion danger.  Coil over shocks are allowed.  

G.     Suspension parts may be moved to a maximum of + or – 1” from stock location. 

H.     Travel limits may be increased to a maximum distance of 12” front and 15” rear. 

I.        Any combination of sway bars either stock or aftermarket. 

J.        Any rear axle from any manufacturer ¾ ton or less.  Narrowed and reinforced housings are allowed. 

K.      Any style wheels.  DOT approved tires only. 

L.       One radiator in stock location only. 

M.    Frame changes (GM to GM or Ford to Ford, etc.) frame must be contained within body configurations. 

N.     Wheel base: Stock length base measurement must be retained + or – 2”. 

O.     Steering:   Steering system components must be located within + or – 3” of original location.  It may consist of aftermarket or custom parts as long as it is stronger and safer than stock.   

P.      Bumpers:   Non-Stock mounts allowed.   

Not Allowed:   

A.      Steering Brakes 

B.      Custom fabricated components to lighten un-sprung weight of vehicle. 

C.      Studded tires. 

D.     Fuel injection systems except stock system as provided on that specific model and year.  

E.      Blowers or turbos, Nitrous Oxide or any other oxygen injection systems. 

Driver Controlled 

A.      Helmets, Neck Collars and Eye Protection:  All helmets must be Snell 90 certified or better.  A helmet shield or some type of goggles for eye protection is mandatory.  Neck Collars are mandatory. 

B.      Fire Suits:  Fire Suits are required, must be clean with no holes. 

C.      Amber Light/Brakes:  Every truck will have to show that it can lock up at least two wheels at “Tech”.  An amber running light needs to be mounted in the rear of the truck for visibility in dusty conditions.   

Driver’s Area 

A.      All glass, chrome, plastic, fiberglass, bolts, screws, and loosed metal must be removed from exterior of truck, inside of doors and driver’s compartment (non-glass mirrors allowed). 

B.      Dashboards must be removed.  Aftermarket gauges allowed. 

C.      Doors and hood must be welded, bolted, pinned or chained shut.  No chain from hood to/around core support or bumper. 

D.     Sun roofs must be covered with aluminum or sheet metal