SUNSET SPEEDWAY - Limited Late Model Rules 2003, 04, 05

1. Body Style

A) Any north American built car: fibreglass, aluminum or steel
B) No jeeps, station wagons convertibles or pickups

2. Body Appearance

A) Cars must be presentable in appearance at the beginning of each race meet

B) Body must be stock appearing with all chrome, molding, ornaments, door handles glass or plastic components removed except for windshields

C) Rear of body must be completely sealed including coverings for taillight assembly.

D) When using a fibreglass roof, you must install min. 20 gauge sheet metal below the roof in driver compartment area. No carbon fiber body parts permitted

E) Wheel opening flares cannot extend past scrub rails. Wheels must not extend outside body or scrub rails.

F) Absolutely no bars shall extend outside of body panels including the grille and bumper with the exception of side scrub rails. Side bars must extend no further forward than the rear of front wheel opening, and no further rearward than front of the rear wheel opening, maximum 1"x2" welded or bolted to roll cage. No sharp edges. When bolting on scrub rails, you must use carriage bolts (or round-headed bolts), if hex head bolts are used, they must be counter sunk.

G) Grille and headlights must retain original appearance.

H) Minimum ground clearance is 4"(four) inches at the lowest point of body or skirt and 5"(five) at the frame to the ground, excluding front cross member (without driver).

I) Body height will be a minimum of 47 inches, measured10" behind top of windshield on roof centerline (without driver).

J) Crush panels, minimum of 40 thou. Aluminum can be used to separate the body panels and
windshields from the interior.

K) Rear spoiler 5" maximum height, and maximum width of 62". Any lip on top edge of spoiler is included in the 5" maximum height. No bracing or side pods. At the point in which the spoiler bends and goes vertical, it cannot exceed beyond the edge of the rear deck and must follow the contour of the rear deck lid. Maximum spoiler height is 40" as measured from the ground to the top of the spoiler.

L) Cars must be equipped with a cable or chain, front and rear to pick the car up.

M) Doors must conform to original shape and be securely mounted using bolts, rivets, and or
welding. No sheet metal screws.

N) Hood must resemble stock hood in appearance. Original manufactured hood scoops only allowed. Exterior hood hinges allowed and must have 3 front hood pins. If hood is removable, it must have 3 front and 2 rear hood pins .(No carbon fibre hoods or bodies panels allowed).

O) Trunk deck lid must be hinged or easily removable to have easy access in case of fire.

3. Battery:

Must be anchored securely and separated from driver and gas tank compartment by firewall.
One 12- volt battery only.

4. Bell Housing Clutch and Flywheel:

Stock steel OEM clutch and flywheel units must not be drilled or machined. Must be as factory issued with no modification whatsoever. Nodular flywheels are allowed. Must have an NHRA steel bell housing, Sema 6.1 flywheel shield or scatter shield of 1/4" steel. Must be mounted over the clutch and flywheel 360o between the bell housing and the floor. No scatter shield inside the car permitted. At your own option, bell housing should have an inspection plate for easy inspection of clutch. If there is no inspection plate on the bell housing, you may be required to remove the transmission for clutch inspection. Minimum flywheel weight of 14lbs. Mandatory ½" hole in bell housing for turning flywheel when whistling your engine.

5. Brakes:

A) Four wheel hydraulic brakes in good working condition are compulsory.

B) Four-wheel discs allowed. Cross drilled rotors allowed.

C) Dual master cylinder with balance bar allowed.

D) No aluminum calipers, floating disc brakes or alterations of calipers and rotors. Steel
calipers and rotors only. Steel caliper mounts only . No four-piston calipers.

E) No brake fluid cooling devices containing a pump.

6. Bumpers:

Must be original type, securely fastened with all metal bracing and /or reinforcing concealed behind bumpers. Must not be wider than width of body. Must be minimum of 15" and maximum of 18"from ground measured from the center of the bumper. No cutoff ends. Ends of both bumpers must be enclosed in with metal.

7. Chassis and Suspension:

A) Unless otherwise specified all suspension parts are to be stock with no modifying.

B) Body and chassis are interchangeable, IE: Ford body on GM chassis, Ford and Chrysler
Motor and body can run GM chassis, GM motors in Ford chassis.

C) Absolutely no offset chassis allowed. Perimeter chassis only.

D) Wheelbase will be a minimum of 105" on full frame chassis. The frame rails can be shortened to meet this measurement. Wheelbase must be within 1 inch from one side
to the other side (I.E. 105" minimum, 106"Maximum) of the car at all times. This is
tolerance for alignment purposes only.

E) Fabricated rear clips are allowed.

F) A factory production stock front clip may be used from the firewall forward. Fabricated front clips are allowed but must meet the following specifications: tubular front clip rule 2"x3" or 2"x4". Factory front clips must extend from in front of the steering box rear ward to the main rail. Frame may be built out of 2"x3" or 2"x4", minimum .095" wall thickness. Underslung rear section must run 25 lbs of penalty weight or 50 lbs of ballast mounted 8"over top of rear end center housing (50 lbs from total weight and not 50 lbs of penalty).

Where the main frame rail ends, forward may be built out of smaller material if desired to accommodate mounting of the front bumper. This will be referred to as the bumper crush tube.

Lower control arms must remain in stock position and will be checked on a regular basis with a portable measuring devise.

Stock steering box is mandatory.

After market center link may be used.

Aluminum tie rod sleeves may be used.

Hiem joint tie rod ends may be used.

Cross member vertical side members must be a minimum size of 2"x3" rectangular tubing and a wall thickness of no less than .095".

Cross member bottom horizontal piece must be minimum size no smaller than 1.5"x 3" x.095" wall thickness.

On 2"x3" clips you must run 40 pounds of ballast in front of the cross member.
On 2"x4" clips you must run 25 pounds of ballast in front of the cross member.
On both styles of clips the weight must be split equally and mounted to each frame rail. All ballast weight must be painted white and marked with car #, and must use self -locking nuts or drilled and wired, on mounting bolts.
The ballast must also be easily removed for weighing purposes.

G) Chassis rails must be of equal distance from the centerline of car. Side frame rails must be symmetrical. No lowering of front member allowed.

H) Chassis from firewall rearward may be fabricated from no less than 10" circumference by .095" box tubing. No holes drilled for lightning purposes.

I) Front coils, struts and sway bars may be interchanged, provided they fit original mounting and are not altered from stock appearance and position. Sway bar must be mounted to lower control arm and may be adjustable. Struts may be use heim ends (Ford).

J) Maximum 4 load bolts may be used.

K) Hubs may be drilled for larger wheel studs. Minimum of 9/16" wheel studs mandatory.

L) No combination of coils and leafs or coil over suspensions allowed. No coil over eliminators.
Minimum 4" O.D. coil springs allowed.

M) Cars must use stock type front hubs and spindles. Steel hubs only, no aluminum hubs. No front floaters. No offset spindles.

N) Steering arms may be altered to fit steering linkage.

O) Any steel front upper control arms may by used. Upper control arm shaft must be stock type steel or aluminum. Sliders are allowed. No heim ends.

P) Stock O.E.M. Lower control Arms must retain in stock mounting position. Left lower control arm can be altered in length to assure positive camber. Measurement from grease nipple to mounting hole in frame must be within 1 inch of factory specifications at all times. Lower control arms cannot be reversed from side to side. Ball joint can be realigned to eliminate binds.

Q) One shock per wheel. No air shocks, or coil over springs inserts allowed. Racing shocks allowed. (Position optional). No remote adjustable shock absorbers. No aluminum racing shocks.

8. Drive Line:

Steel Drive Shafts Only. Must have steel 360-degree retaining loops 1/4 by 2" positioned at the front and rear of the drive Shaft within 6"of each u-joint. No chains. Drive shaft must be painted white or fluorescent. No accessories may be driven off or attached to drive line.

9. Engine:

A) V8 engines only, with a maximum compression ratio of 9.5 to 1, as calculated by the track whistler. 10.0 to 1 compression motors will be allowed but must add 75 lb.

B) Maximum size is Chrysler and AMC 360, Ford 351 and Chev. 350 cubic inches. Maximum overbore of .060".

C) Engine Location:
For a 105" to 107" wheelbase car engine must be located where the front most spark plug must be centered or ahead of the upper ball joint line with 0 tolerance. Wheelbase over 107" have 1" of tolerance.

D) Minimum engine height of 12" from center of crankshaft to ground level.

E) Camshaft- Hydraulic flat tappet cam only allowed. Offset camshaft key allowed. Must
Run stock size bore for engine being run, no sleeving. Chryslers exempt. No belt- drive
Systems permitted. No multiple gear drive systems permitted.

F) Cylinder Heads:

1) Stock O.E.M. or World Products cast iron straight plug only. No other aftermarket cylinder heads allowed.

2) World Products cylinder head part #4350, #43600-1, #43610-1, casting# I-052 is allowed.

3) No porting, polishing or port matching of cylinder head, intake or exhaust manifolds; and no porting, polishing or relieving under the valves. Stock Only.

4) No special lightened valves. No titanium valves. No turning of valve stems. A .020 maximum undercut valve may be used.

5) No GM angle plug heads.

6) No head with cast number 292.

7) No Chevy bow tie heads. No GM Vortec heads.

8) The maximum valve sizes as measured across the valve are as follows:
General Motors : Intake- 1.94 Exhaust -1.50
Ford Cleveland : Intake - 2.04 Exhaust - 1.65
Ford Windsor : Intake - 1.84 Exhaust - 1.64
Chrysler Corp. : Intake - 1.88 Exhaust -1.60

9) Maximum O.D. of valve spring 1.260".

10) Rockers must be stock for engines. 1.5 to 1 ratio only.

11) Screw in stud and guide plates allowed. No stud girdles.

G) No dry sumps.

H) No aluminum blocks.

I) Engine must use factory specs for bore and stroke. 6" rods allowed, no aluminum or fluid dampers, OEM steel elastomer - type balancers only. Aluminum pulleys allowed.

J) Pistons - Any flat top.

K) Intake Manifold - These manifolds must remain as manufactured. No port matching or flow work permitted. Manifolds must not be painted. All part #'s are current design Edelbrock performer series intake manifolds. Older design manifolds with the same part # are not permitted. Approved: Chevy #2101, Chrysler #2176, Ford Cleveland #2750, Ford Windsor #2181
Adaptor to be one pc. solid phenolic with no modifications and with gasket not to exceed a thickness of 1.25".
Or stock cast iron 2-barrel intake. No alterations allowed. No aftermarket intake manifolds allowed. Maximum size venturi holes in intake adapter plate 1.755". Maximum size holes in intake manifold 1.720".

L) Exhaust Manifold:

1) Stock cast iron 2 ½" maximum outlet exhaust manifolds only.

2) Notching of cross member allowed to accommodate exhaust manifold. Cross-member must be properly plated so it is not weakened.

3) No polishing or matching of ports, must bolt to head without spacers and remain in stock position.

4) No inverting of manifolds

M) Exhaust:

1) The maximum O.D. of the exhaust tubing is 2 1/2".

2) Pipes must be firmly mounted and exit within 17" ahead of right rear tire. Pipes to be cut flush to the body and above the frame rail.

3) No collector pipes or collector boxes allowed.

N) Fuel Pump: Stock mechanical pump only.

O) Fuel: Petroleum based unleaded fuels only. The gasoline shall not be blended with alcohols, ethers, or other oxygenates and it shall not be blended with aniline or its derivatives, nitro compounds or other nitrogen containing compounds. No lead additives allowed. No NOS system.

P) Carburetion: One R4412-500 C.F.M. Holley factory stock produced two-barrel carb. only. The only changes allowed are jets; power valve and removal of choke parts. Two throttle return springs and stop are mandatory. Carb. hats allowed. Air cleaners are mandatory. An accelerator toe bar recommended. Air filters boxes are permitted. No boost venturi below the throttle plate. No ram air systems. A quick-change jet kit (part #3425 float bowl) may be used. No Keith Dorton performance carburetors.
Holley factory stock measurements are as follows:
· Metering block must have the following ID# stamped on it. Factory stock #5924 or#5925. The #10570 will appear on replacement or service metering blocks.
· Metering block power valve channel restriction ports (2 holes behind the power valve) maxi. .0635"
· Metering block idle feed restriction ports (2 holes) maximum: .035"
· Metering block main passage to discharge nozzle (2 holes) maximum: .141"
· Main body high speed air bleeds (2 holes) maximum: .028"
· Main body idle speed air bleeds (2 holes) maximum .070"
· Butterfly (throttle plate) thickness: .0398" - .0438"
· Hole in butterfly: .090"-.096"
· Butterfly must have stamped on it ID#215
· Throttle shaft diameter .368"-.369"
· Throttle shaft thickness at flat of shaft: .152"
· Venturi bore diameter: 1.373"-1.377"
· Boost venturi inner bore diameter .377"-.383"
· Boost venturi outer diameter .610"-.630"
· Throttle bore diameter 1.6855"-1.6865"

Q) Distributor and Ignition:

1) Battery operated ignitions only.
2) Car must be self-starting and have an ignition kill switch on left and right side of dash. Kill switch must be painted red within reach of driver on left hand side of car.
3) Stock single-point distributor and stock coil allowed. No dual points.
4) OEM electronic ignition may be used and require stock coil and stock type ignition modules. (No Mallory or MSD type systems allowed.)
5) Vacuum advance may be removed.

10. Starter:

Race cars must be self- starting. NO push starting. Starter must be in stock position and functional.

11. Fire Walls:

A) Interior: all flammable materials must be removed.

B) Front firewall does not have to be original, but must be min. 22-gauge steel. Passenger side of fire wall may be moved as far back as the front of the roll cage, to allow for easy access to drive line, and may be .045" aluminum.

C) A metal firewall of 22-gauge steel must be securely fitted over the rear seat back brace. The top shelf behind the driver's seat to completely close off the trunk compartment and may be constructed of .045" aluminum.

D) All sheet metal work must be neat and properly fitted. All holes are to be covered with sheet metal either welded or riveted.

E) Floor must be complete and have all holes covered with sheet metal. Step up over transmission/driveshaft tunnel to the right roll cage uprights can be maximum height 10" from driver's floor and of minimum 22-gauge steel.

F) The rear deck panel, dash, and above the drivers shoulders may be .045 thou aluminum.

12. Fire Control:

A) Cars must have a current year approved fire extinguisher mounted in an approved mounting bracket and must be bolted down, and within driver's reach with seat belts fastened. Fire extinguisher must have a dated approval tag and gauge.

B) Driver's fire suit is mandatory. No coveralls. Driver and suit must maintain clean looking appearance. Fireproof gloves, neck collar, balaclava, underwear, socks, and shoes are recommended. No nylon shoes allowed.

C) Flame retardant solution suggested for renewing fire retardant properties, 6 oz. Boric acid, 1 Gallon of water, 9 oz. Borax. Soak in above solution for 5 min. allow to drip dry.

13. Fuel Cell:

A) Fuel Cell Mandatory.

B) Fuel cell must be mounted between the frame rails (no notching of the rails allowed) and the bottom must be mounted no lower than the bottom of the rear axle tube. Fuel cell must be secured with steel straps made of 1" x 1/8", not less than two lengthwise and two crosswise, full 360 degrees.

C) Fuel cell must have left side, right side and rear hoop protection bars, minimum 1 3/4" x .095" tubing.

D) Fuel cell must have a one way check valve in the vent line.

E) No vented gas caps permitted. Gas cap must have an appropriate attaching line to prevent its loss.

F) Steel fuel lines must be used and neoprene can be used for connection purposes only. Must be securely fastened under floor. No copper lines. Metal fuel filters only. Oil line to gauge must be braided copper or steel line.

15. Instruments:

Oil pressure and heat gauges mandatory.

16. Paint and Lettering:

All cars must be neatly painted. Numbers assigned by the track must be painted on both sides of the car and roof, in minimum 24" high by 3" wide letters (roof numbers read from right side) of a color offering a distinct contrast to the color of the car. No trick numbers. No foil numbers. 4" numbers on both headlight and tail light caps required. Block type numbers 6" high, white in color, must be displayed on the upper right hand side of the windshield.

17. Radiators:

Must be in stock location and include a 1-gallon metal overflow can securely mounted ahead of engine firewall, and under hood. No antifreeze. No remote rads. If over flow tubes are used, over flow tube must exit from under the hood on the right side of the car, at the base of the windshield only.

18. Rear End and Suspension:

Any three or four point hook up may be used. Lower arms must not exceed 30" from mounting holes on rear end to mounting holes on frame. Upper arms must not exceed 30". Rubber biscuits allowed at one end of trailing arms. Panhard bar must be a one-piece solid. Heim joints allowed.

A) Rear ends must be locked.

B) Rear ends are interchangeable (ie: Ford to Chev)

C) Floaters with steel or aluminum hubs recommended.

D) Rear ends must remain in stock position and centered.

E) No birdcage mounted rear ends.

F) No ratchet ends. No traction assist or control devices allowed.

G) No cambered rear ends allowed.

19. Roll Bars:

A) Cage must be constructed of 1 3/4 inch round steel minimum out side diameter by .095" wall thickness.

B) Four point cage compulsory.

C) Base of uprights must electric or mig welded to frame of car.

D) Cage must be braced to the rear frame kick-ups and diagonally between the rear uprights.

E) A transfer bar between the rear diagonal and the front frame optional.

F) A minimum of four horizontal bars must be inside the left side door and three bars inside the right door and a minimum of two vertical bars between each horizontal bar. Minimum 40" length by 14" high, 16 gauge metal between door bars and body skin on driver's side is mandatory on all cars.

G) A center overhead bar running fore and aft between transverse members is compulsory.

H) No pipe fittings allowed.

I) All roll bars in the driver's area must be properly padded and taped with foam rubber.

J) Left leg protection bar must be installed between roll cage and left front rail. All welds will be subject to the approval of the tech inspectors.

20. Safety Belts and Harness:

A quick release lap belt of no less than 3-inch width and 3-inch shoulder harness is mandatory. Belts must be securely fastened to frame and/or roll cage with minimum 3/8" inch grade 8 bolts. Crotch V-Belt mandatory. Seat belts must be dated within the last 3 years. Collapsible steering columns and padded steering wheel hubs mandatory.

21. Safety Helmet:

A Snell 1995 SA or newer approved racing safety helmet and complete driver's racing suit must be worn in all practice and race events. Goggles Mandatory.

22. Seat:

An aluminum racing seat must be used, bolted to roll cage, not bolted to the floor. When mounting seat use minimum 3/8" grade 8 bolts with large washers to hold racing seat, to seat framework. Minimum of two bolts on the seat back and two bolts on the seat bottom. Seat must be positioned completely to the left of the centerline of the car. An approved head restraint must be made of some energy adsorbing material. Headrest side plates recommended.

23. Tires:

All entries are required to use one brand of tire as approved by track management.

24. Transmissions:

A) Any manual stock transmission that bolts up to stock engine without alteration. No special engine transmission adapter plates permitted. All gears must be operational.

B) Automatic transmissions, must remain stock as produced, cooler is highly recommended torque converter must be a minimum of 10" diameter. No rebuilt torque converters allowed. Automatic receives 50lb weight advantage.

25. Weight:

Car weights are 55% maximum left side and 50% maximum rear. All ballast weight must be mounted safely and securely, no lower than 5" ground clearance. All weight must be labeled with car number and painted white. Added weight must be in block form in no less than five-pound blocks. Cars will be weighed and teched after racing as they come off the racetrack with driver in car and without topping up fuel. Minimum weight 3,050lbs.

26. Racing rim only:

Maximum width 8 inches. No aluminum, magnesium or wide 5 bolt pattern wheels. No wheel spacers allowed. Minimum weight 17lbs.

27. Windshield & Window Net:

A) Windshields must be safety glass with 4 safety clips or lexan. No plexiglass allowed

B) Window net mandatory with minimum 3/8 inch rod. Must have top release.

C) Front and rear lexan must retain stock angle. Pillars must be approx.. stock width and location.

D) Front windshield center bracing mandatory. No exterior bracing, front or back. Minimum two, and must be on the inside of the car.

E) Only factory tinted front windshield permitted. No added film spray tinting permitted. Minimum side window openings 22" length x 14 ½ height.

F) No obstruction of driver's view, in or out of race car, with the exception of the top 4"of the front windshied for sponsor decal. No letters or numbers on rear window.