SCORE Class 3 rules (from the '06-'10 book)

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According to the SCORE rule Book Class 3 is:
PRODUCTION-Short Wheelbased 4x4

(108 inches maximum)

Vehicles built from a 4-Wheel drive utility type vehicle.
Vehicle must have been series produced in quantities of at least 5,000 units within a 12 month period & be readily available to the general public in the U.S.A. Must be a 4-Wheel drive vehicle capable of being driven through all four wheels
No pickup trucks allowed in this class.

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GENERAL REGULATIONS
Entrants in this class shall comply with all applicable general regulations


COMPETITION REGULATIONS
Manufactures body, engine, & chassis combinations must be retained.
this class is an open production class & all components will be considered open unless restricted herein.
NOTE: The CR abbreviations listed under this class ( I.E. CR1 HELMETS) refer to cross reference listings in the front of this book.
( Obviously We dont have the Book here @ C3R, I'm just coping if from the Book
These cross reference lisitings are part of the class rules. Where a conflict occurs between the cross referenced listing & a rule contained under this class, the rule contained under this class has precedence

SAFETY EQUIPMENT

CR1 HELMETS: Helmets must be of the type approved by Snell memorial foundation, 1995 or 2000, with either a blue or rainbow colored snell sticker attached on the inside. SCORE recomends each helmet be labled (painted) with the driver/riders name, blood type, allergies, or any other medical information. Straps must have "D" rings, no snaps.

CR2 PROTECTIVE CLOTHING:
4-WHEEL VEHICLES
Driving suits are requiered that effectively cover the body from the neck to the ankles & wrist. Suits must be manufactured from fire resistant material with the maufacturer's fire resistant label attached.
ONE PIECE DRIVING SUITS ARE MANDATORY.
Drivers suits must be in good condition & free of damage (i.e. holes, tears, rips etc.) Driving gloves are recommended & must be made out of leather &/or other fire resistant material containing no holes.
A space 2" high by 4" long located on the upper left chest area of the driving suit must remain open for SCORE's use. SCORE will prescribe at the start of each new season what patches will be placed in this area.

CR3 EYE PROTECTION & DENTURES:
Shatter resistant eye protection is required for all occupants competing in/on vehicles without full windshields.
those competing in closed cockpit vhicles must have eye protection available in the event the windshieldis knocked out or broken.
It is highly recommended that entrants with removable dentures remove them prior to competing in an off-road event

CR4 FIRST AID KIT:

4-Wheeled Vehicles
A suitable, weatherproof, emergency kit composed of individually packed units must be carried in each vehicle. Each individual unit must contain at least the following items:
1- 4" Bandage Compress
2- 2" Babdage Compress
1- Triangle Bandage
8- 2" x 3" Adhesive Pads
16- 1" x 3.375" Adhesive bandages
10- Prep Pads Treated
1- Eye Dressing Packet
10- Ammonia Inhalants
1- Ace Babdage


CR5 EMERGENCY SIGNALING DEVICES:

All vehicles except Motorcycles & ATV's must carry a minimum of two(2) fifteen(15) minute phosphorus emergency signaling flares during long course events. Also all vehicles may be required to carry additional emergency signaling during long course events

CR6 HORNS:

It is required that all vehicles except Motorcycles & ATV's be equipped with a loud sounding device. No sirens allowed.

CR7 REFLECTORS:

All vehicles must have either two(2) (4-Wheeled Vehicles) or one(1)(Motorcycles & ATV's) 2" minimum diameter red reflectors on the rear of the vehicle &/or helmet.

CR8 FIRE SUPPRESSION EQUIPMENT:

Each vehicle except Motorcycles & ATV's shall be equipped with a portable UL approved 2.5 lb minimum ABC rated dry chemical type or halon fire extinuiser equipped with a capacity gauge. The extinguisher must be fully charged easily accessible.
A permanetly installed on-board fire suppression system using either an approved chemical foam or halon agent is HIGHLY RECOMMENDED in addition to the portable extinguisher. An on-board system should have three(3) nozzles located in each of the following areas: Driving compartment, Fuel compartment, & Engine compartment.

CR9 SURVIVAL SUPPLIES:

All vehicles competing in long course events must carry at least two(2) days of survival supplies & at least one(1) quart of water or other sutiable liquid for each occupant/rider.

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SUSPENSION COMPONENTS
Spindles may be reinforced or replced but must retain the original stock concept. Front & rear suspension must be of the same basic design & concept as originally produced & installed on the chassis to which it mounted. This wll be determined by manufacturer of chassis & the year the chassis was manufactured. Suspension parts may be strengthened, reinforced, or replaced, but stock track width (4" must be retained. Suspension must retain the original design & concept (A-Arm, MacPherson Strut, I-Beam etc.) & all primary spring systems must retain the original concept ( Leaf, Torsion Bar, Coil, etc.) that was delivered on the year chassis that is in use. Items with no restrictions are:
(A) Pivot point bushings
(B) Spring rates & capacities
(c) Ball joints
(d) Mountings
Primary coil springs are limited to one coil per wheel & must be mounted according to stock concept.
Stock production wheelbase may not be longer than 108" .
Wheelbase must retain +/- 2" as long as it does not exceed 108".

CR10 SHOCK ABSORBERS & BUMP STOPS
(Class 3 rules)
Number of shock absorbers & mounting methods are optional. Mounting points may be redesigned,strengthened, & modified.
Remote mounted shocks are allowed.
Shocks may not protrude through hood.
(CR10)
At least one shock absorber per wheel, in working condition, must be used on all 4-wheel vehicles. Other systems are conditional upon the approval of SCORE.
Suspension bump stops can only be made of rubber, plastic, urethane, etc.
For classes that have wheel travel limitations the following will apply:
Front wheel travel will be measured at the center line of the front spindle as the front suspension is stroked through its travel from metal stop to metal stop. Rear wheel travel will be measured at the center line of the axle as the rear suspension is stroked through its travel from metal stop to metal stop. Stops will be non-removable & non-adjustable. if limiter straps are to be used for stops the bolts that mount them must be drilled so that SCORE wire seal can be attached.

CR10 SECONDARY SUSPENSION
(Class 3)
Secondary suspention allowed. With secondary suspension system disconnected the primary system must be capable of maintaining ride height +/- 1.5".
(CR11)
Secondary suspension would include leaf springs, torsion bars, coilover shocks, air bags, Haga balls or any other item that changes the wheel rate at any point in its travel other than shocks & the stock suspension system that came with the vehicle.
Air shocks will be considered secondary suspension when charged to 200 psi in its fully extended state & the static shaft pressue exceeds 300 psi when fully collapsed.
Bump stops will be considered secondary suspension when they contact the suspension unit more than 4" before the end of its travel. Suspension bump stops can only be made of rubber, plastic, urethane, etc.

CR12 WHEELS & TIRES

Snap-on hubcaps or wheel covers of any type are not permitted on any class of vehicle during competition. Tires will be visually checked for condition & must be considered safe by SCORE prior to competing. it is highly recommended that all paint be removed from the mounting surfaces of the rim & the hub. (Paint burns & blisters & peels, allowing the lug nuts to loosen.)
Maximum tire size is 40" Outside Diameter (O.D.), Pressure checked @ 18 psi on rim to be use.

CR13 FASTENERS

All nuts, bolts, & component parts on each vehicle's suspension system, chassis & running gear must be secured with S.A.E. Grade 8 or better nuts & bolts & secured with either lock nut, lock washer, cotter keys or safety wire, & have at least one full thread showing through the nut.

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STEERING & BRAKE COMPONENTS

CR14 STEERING

Steering wheel play must be kept to minimum. Drag link & tie rod ends must be secured & keyed. All welded parts must be reinforced. If the steering shaft is not a factory production item, then the shaft must be welded, not brazed, to the wheel mounting flange. Minimum specifications for the shaft are .750" O.D. X .060" wall thickness unless it is an original factory production item. Steering must be considered safe by SCORE before the vehicle will be allowed to compete.

CR15 BRAKES

Brakes must be in a safe working condition & able to apply adeqate braking force to "Lock-up" all four wheels. Turning or steering brakes are allowed.

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ELETRICAL SYSTEM

CR16 IGNITION

Each vehicle in competition must have a positive action on-off switch in good working order. The switch must be located within easy reach of the driver & marked on labeled "ignition" on-off.

CR17 BATTERIES

Batteries must be securely mounted with metal-to-metal tie-downs. All batteries mounted in the drivers compartment must be fully enclosed including the sides & bottom of the battery. The container must contain the quantity of acid in the battery when inverted. Aircraft batteries which are not covered but located in the driver's compartment are not acceptable. (batteries will be considered to be located in the driver's compartment if there is not a full bulkhead (firewall) separating the driver & the battery.)


CR18 LIGHTS

All4-wheel vehicles must have a minimum of two (2) headlights. two (2) brake lights & two (2) taillights.
Taillights must be mounted at least 36 inches from the ground if other than stock. The brake lights must be at least 3" in diameter. All tail lights must be DOT & in operating condition at all times

All four-wheel vehicles must a have a rearward facing amber colored light. Amber light must be at least 3" diameter & DOT approved.
this light must connected to the ignition & remain on during the race. The bulb must be 25 to 55 watts, or LED with equivalent lumens as as it has a amber colored lens. The lens must be coated deep amber. (Any other color coated lenses will not be accepted. this includes clear) Light must be visible from any position aft of the vehicle & must be protected from damage in case of roll over.

Rearward facing lights must be in a operational conditionbefore the vehicle will be allowed to start an event. During an event if the light goes out it must be fixed or replaced at the next available pit location before proceeding in the race. Any light that is connected to a switch that allows the vehicle to move in any direction without the light being on will cause that entry to be disqualified


CR19 STARTERS

All vehicles except Motorcycles & ATV's must have a battery & a starter capable of cranking & starting the engine.


CR20 FUEL

Any of the following commercially available gasoline's, LPG, or diesel fuel may be used.
(1) Service station type pump fuel.
(2) Racing gasoline as manufactured.
(3) Commercial aviation gasoline as manufactured.
(4) Natrual or Propane Gas as manufactured.
No oxygen bearing fuel including alcohol or nitromethane is allowed.
Commercially produced, nationally advertised fuel additives may be used only in the quantities specified by the manufactured & only if a sample of the gasoline with the additive is supplied for inspection to SCORE. Fuel samples may be taken at random before, during, & after the event.


CR 21 FUEL TANKS
Safety fuel cells are required.

Safety fuel cells are required for all fuel tanks in all classes except Motorcycles, & ATV's, Auxiliary fuel tanks may be added to a vehicles in all classes except Class 11. Auxiliary fuel tanks must be safety fuel cells. All fuel cells must be securely mounted, filled from & vented to the outside of the vehicle, & have a substantial cross member between the fuel tank & the driver in the vehicles with rear mounted tanks.
No GI cans or fuel containers similar in construction or purpose will be allowed in/on any vehicle during a race.
Saftey fuel cells shall consist of a bladder enclosed in a metal (minimum of .060 thickness) container as follows:

Materials
Bladders shall be constructed of nylon or Dacron woven fabric impregnated & coated with a fuel resistant elastomer. Rotary molded polymer cells are acceptable. The minimum standards acceptable for physical properties are:

Test Type/ Minimum Standard/ Test Specification
tensile strength/ 450 lbs / Spec.CCC-T-1916 Method 5102
Tear Strength/ 50 lbs / Spec. CC-T-1916 Method 5134
Puncture Test/ 175 lbs / Spec. Mil-T-6396 Article 4.5.17


These physical properties must be maintained throughout all areas of the finished bladder including seams, joints & fittings.


Fittings & Connections
All fittings shall be built into the skin & bonded as an integral part of the tank or mechanically bound to the skin by a system of ring & counter ring with sealing by either a flat joint & or with an "O" ring.

Container
The bladder shall be fully surrounded in a smooth skinned casing. The container shall be made of .060" Aluminum or steel. Use of magnesium prohibited. The container must be securely fastened to the frame or floor with bolts &/or steel straps.

Foam
Internal baffling is required in all fuel cells.



CR22 FUEL FILLER LINES, VENTS & CAPS

Fuel filler lines & caps must be mounted in a location where they cannot be knocked open or off during movement of the vehicle. All fillers must be located within a line drawn from two extremities of the frame or body structure so as to prevent opening during roll-over or accidental impact. Fuel pick-up openings, lines, breather vents, & fuel filler lines shall be designed & installed so that if the car is partially or totally inverted fuel shall not escape. Fuel breater lines must have a check valve & in addition the line must make a loop around the fuel cell. Fuel tank breathers must be vented outside the drivers compartment.
All fuel fillers attached to the frame or body must have a flexable coupling to the tank. Positive locking non-vented fuel filler caps (no monza/flip type) are required. if the fuel filler cap is located directly on the fuel tank a check valve is not required. if the fuel filler cap is not located directly on the fuel tank (I.E. within 2"), a check valve must be incorporated in the fuel tank to prevent fuel escaping if the cap & filler neck are torn from the tank. It is recommended that all lines, filler openings, & vents be incorporated in a single fitting located at the top of the fuel tank.
All fuel fillers must be surrounded at the outer extremity with a splash guard or boot designed to direct spilled fuel to outside of the vehicle away from the driver, engine, & exhaust system when fueling. A body panel is acceptable as a splashguard if the fuel filler penetration is sealed.

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CR23 Engine & Engine Displacement
Where applicable, engines must displace no more than specified, & SCORE may check engine displacement & location. In classes that require stock fuel injection, this will require the use of stock intake manifold & throttle body for the motor for which it is attached. Computer & injectors are open.

Engine must be of the same manufacturer basic design & type & have the same number of cylinders as the one installed by the manufacturer. Any displacementengine may be used as long as the original block casting remains the same. Block must be made of the same type of material as that of the block is installed in the vehicle by the manufacturer for the particular chassis & body series. If vehicle is supplied with an aluminum block, only the aluminum block installedin the vehicle by the manufacturer may be used. Engine must be readily available to the general public in the U.S.A.
Engine must not have more valves per cylinder than the stock heads that where delivered in that vehicle.
Any make of automotive carburetor(s) may be used maintaining a combined total of not more than one venturi per cylinder. Stock factory fuel injection may be used.
Items with no restrictions include:
(A) Strengthening & balancing
(B) Valve train & camshaft
(C) Bore & stroke
(D) Pistons
(E) Blueprinting
(F) Oil & water cooling systems
(G) Air cleaners
(H) Fuel pumps
(I) Exhaust systems
Water & vapor injection not allowed unless originally equipped.
Engine must be located in the stock mounting location as delivered from the manufacturer +/- 1 inch. This will be measured from the centerline of the front spindle to the back of the block. Engine height must remain stock +/- 1 inch as measured at the centerline of the crank.

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CR24 ENGINE REPLACMENT
No vehicle including Motorcycles & ATV's may replace a complete engine during an event. ( Closed course events excepted. ) Motorcycles & ATV's engine cases are considered to be engine blocks & may not be replaced, although internal parts (gear, clutches, etc.) may be replaced.
SCORE may mark engine blocks & or cases.

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CR25 TRANSMISSION
Every vehicle in competition except Motorcycles & ATV's must have a functional reverse. Fourwheel drive class vehicles must be capable of being driven through the front wheels.


Transmission is open.

Differentials
Rear differentials is open but must remain stock concept. Gear ratio, carriers, axles & floating hubs are optional.
Front differential must be a production automotive type but axle tubes may be replaced.

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CR26 THROTTLES

Each vehicle except Motorcycles & ATV's must have a foot throttle incorperating two (2) positive action return springs attached directly to the carburetor throttle arm & must register a minimum pull of two (2) pounds each. A positive stop or over-ride prevention system must be used to keep linkage from passing over center & sticking in an open position.



CR27 EXHAUST
Each vehicle, regardless of class, may be required to be equipped with mufflers or forestry approved spark arrestor. Exhaust systems must be installed in such a manner as to direct the exhaust gases out of the body, rearward, behind the driver, away from the fuel tanks & tires, & placed in such a manner that will minimize the producing of dust. Exhaust pipes must extend at least to the rear of the driver's compartment.



CR28 DRIVESHAFTS
All front engine vehicles utilizing open driveshafts must have a retainer hoop securely mounted & located within 6" of the front universal joint. Four-wheel drive vehicles are not required to restrain the front driveshaft from the transfer case to the differential.
The retainer hoop may consist of either a .25" x 2" steel strap, or 2" wide nylon webbing both securely attached to a body or frame member.



CR29 FLYWHEEL SHIELDS
All front engine vehicles with standard transmissions & solid lifters must have a Sema-approved bell housing or cover



CR30 FLUID COOLERS
Oil coolers, transmission coolers, radiators mounted ahead of the driver or in the passenger compartment must have a shroud behind the cooler that will prevent liquids from the cooler or its lines from blowing back onto the driver or codriver. All hoses that run through the passenger compartment must be shielded as well.



CR31 AUXILIARY EQUIPMENT
A generator, fan, water pump (water-cooled engines), & a complete funtional electricl system must be connected & in operation at all times. Drive belts must be sufficiently tight to drive equipment in a satisfactory manner & without noticeable slippage. Thermostatically controlled accessory fans are allowed. Auxiliary equipment for certain classes may be waived during closed course events, however vehicles must have functional & working taillights.



CR32 SUPERCHARGERS & TURBOCHARGERS
Superchargers & turbochargers are not permitted in any class of competition. Diesel engines in stock classes witch utilize stock turochargers may be approved on a individual bases.

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VEHICLES SAFETY EQUIPMENT

CR33 ROLL CAGES
All vehicles in cometition except Motorcycles & ATV's must be equipped with a roll cage. Minimum design & tubing size based on seamless 4130 chromoly tubing or ASTM 1018/1026 CDS/DOM.
No aluminum or other non-ferrous material permitted.
Material
Material for roll cage construction must be 4130 chromoly tubing or ASTM 1018/1026 CDS/DOM.
All welding must be of the highest quality with full penetration & no undercutting of the parent metal. All welds shall conform to the American Welding Society D1.1, Structural Welding Code,
Chapter 10, Tubular Structures & Standards for the material used ( see AWS.org ). It is strongly recomended that the welder inspect all welds using Magnaflux, die-penetrate, or other effective methods.
All tubes must be welded 360-degrees around the circumference of the tube.
No oxacetylene brazing or welding allowed. Good external apperence of a weld does not necessarily guarantee its quality, poor looking welds are never a sign good workmanship.
None of the tubing may show any signs of crimping or wall failure. All bends must be mandrel type. The center radius of the bends may not be less than (3) times the outside diameter of the roll cage tubing.
It must be emphasized that the use of heat-treated or high carbon steels may cause problems & that bad fabrication may result in a decrease in strength (caused by brittle heat-affected zones), inadequate ductility & internal stress.


Roll Cage Tubing Sizes
For the purpose of determining roll bar tubing sizes, vehicle weight is as raced, but without driver. Note: There is an allowance of minus 0.005 inches on all tubing thicknesses. Minimum tubing size for the roll cage is:
Up to 2000 lbs.
1.500" x0.095" CDN/4130/Seamless or ASTM 1018/1026 CDS/DOM
2001 - 2500 LBS.
1.500" X 0.120" CDN/4130/Seamless or ASTM 1018/1026 CDS/DOM
2501 X 3000 LBS
1.75" X 0.095" CDN/4130/Seamless or ASTM 1018/1026 CDS/DOM
3001 - 4000 LBS.
1.75" X .120" CDN/4130/Seamless or ASTM 1018/1026 CDS/DOM
Over 4000 lbs.
2.000" x 0.120" CDN/4130/Seamless or ASTM 1018/1026 CDS/DOM