SECTION 19 - LATE MODEL DIVISION

19-1 CAR BODIES

1. The body must be stock, template style only. No square corners, flat sides or any unusual aerodynamics.
2. As a general rule, the Five Star Body dimension chart and templates will be followed.
3. The body may be steel, aluminum or fiberglass.
4. The rear spoiler must be mounted at rear trailing edge of body or trunk deck. Rear spoiler must be single plane. Maximum size of spoiler 5" x 60" (300 sq. inches).
5. Rear spoilers must be lexan.
6. Rear window and roofs must be braced sufficiently to prevent deflection by airflow.

19-2 GLASS

1. A front and rear windshield is mandatory.
2. No side windows. Air ducts are allowed in quarter panel window only. Clear Nacaduct allowed in drivers side vent window position. Single hole nacaducts only, must meet officials approval.
3. Two rear view mirrors allowed.
4. Lexan windshield of .125" inch minimum thickness and two window braces in center of windshield is mandatory.
5. All other windows must remain open.

19-3 INTERIORS

1. Interiors must be complete and sealed at all times - NO HOLES.
2. Floorboard and vertical rise of transmission "tunnel" must be magnetic steel. Floor thickness 065" inch minimum. Tunnel thickness 20-gauge minimum.
3. Front and rear firewall of the driver’s area must be magnetic steel with a minimum thickness of 20-gauge.
4. The interior design must be as clear spaced as possible. No "tub" type interiors
5. No fuel lines in drivers compartment.

19-4 SEATS & SEATBELTS

1. An aluminum racing seat is mandatory.
2. A padded headrest is mandatory.

19-5 ROLL BARS (Refer to diagrams this section)

These are the minimum roll bar requirements.

1. Material used must be a minimum of 1-3/4" inch diameter magnetic steel round tubing with walls not less than .090" inches thick. Roll bars must be electrically welded.
2. All cars are required to have a rear vertical hoop behind the drivers head, connected to left and right front roll bar legs by a roof hoop. The front roll bar legs must follow the contour of the windshield post and cowl. The rear vertical hoop must be supported by a diagonal bar from the top left to bottom right, or top right to bottom left. A roll bar must connect the left and right side of the rear vertical hoop at seat height. An "X" must connect left and right frame rails. An additional roll bar must be installed across the bottom of the dashboard, extending from the left front roll bar leg to the right front roll bar leg. Rear support bars, left and right, must extend from the top of the rear vertical hoop to the rear of the frame in the trunk compartment. The front leg bars and rear vertical hoop must be connected on the left side with four horizontal door bars. The door bars on the left side must be convex in shape and spaced from top to bottom as equally as space permits. Top left door bar must be a minimum of 22" inches to top and the top right a minimum of 18" inches, (measured from top of the frame rail). Door bars must have 6 equally spaced vertical studs. Two angular studs must be attached from the bottom door bar to the main frame rail. The right side must have at least 4 door bars. Front wedge bar, roof wedge bar, transmission hoop and front hoop are mandatory. Butt welds, joints and connections must have gusset plates for reinforcement.
3. Roll bars must be padded anywhere within drivers reach. High density padding is mandatory.
4. Top roll bar and hoop must follow the contour of the roof as closely as possible. The roof hoops at the side of the side window openings must be tight to roof.
5. Door bar deflector plate and driver foot deflector plate are mandatory. (Refer to diagram this section.)

19-6 CHASSIS & FRAME

1. All chassis and frame construction must be approved prior to competition.
2. All frame rails will be a minimum 2" inches wide x 3" inches tall. Magnetic steel tubing center frame rails from front clip to rear clip or tail section must be a minimum of .120" inch thick. Remaining frame rails will be a minimum of .083" inch thick. Rear frame rails must extend to rear cross member behind the fuel cell.
3. Rear tail sections may be conventional kick-up or under-slung design; however, a design break must be incorporated in rear tail.
4. No drilling or lightening of frame.

19-7 STEERING

1. Any type conventional steering or rack and pinion system allowed.
2. Steering column shaft may be supported by mono-ball or heim type pivots. Column shaft must have at least two movable joints for collapsibility, or collapsible telescoping steering shaft.
3. Padded steering wheel mandatory.

19-8 SUSPENSION

1. Front suspension must be independent, with coil springs or torsion bars.
2. Ball joints or mono balls must be used on outer end of upper and lower control arms. No rod ends, etc.
3. Coil over shock units allowed.
4. Only one shock per wheel, maximum retail price of $240 per shock. No remote adjustable shocks.
5. Conventional 3 or 4 link rear suspension only.
   1. One spring adjusting bolt per wheel.
   2. No additional mechanical, electrical, or hydraulic weight shifting devices or wheelbase altering devices.
6. No remote adjustable panhard bar mounts. A positive fastening device must be used.
7. No rear sway bars.
8. All trailing arms and 3rd link tubes must be of one piece construction. No springs or slide sleeves. 3rd-link rubber mounting bushings are permitted.
9. No cambered rear ends, axle tubes, spacer plates, no cambered snouts, no crown cut axles, one piece steel plates only.
10. Magnetic steel spindles only.
11. Magnetic steel front hubs only.

19-9 BRAKES

1. Brake system must be conventional hydraulic type.
2. Magnetic steel brake rotors only.
3. Must have functional and working four-wheel hydraulic brakes.
4. No brake fluid re-circulator or fluid pumps.
5. Steel or cast iron, single piston calipers and assemblies.
6. Brakes 25# weight penalty for multiple piston calipers.

19-10 WHEELS

1. Magnetic steel wheels only. Maximum width bead to bead of 10" inches.
2. Minimum wheel weight 20 lbs.
3. Maximum bolt circle 5-1/2" inches, front and rear.
4. No bleeders
5. Wide 5’s allowed

19-11 TIRES

1. Each driver will be allowed to purchase up to eight new tires at the start of his/her racing season. These tires shall be marked, numbered, registered, and impounded by Raceway Park officials. Only tires impounded by Raceway Park officials will be permitted in time trials, qualifying heats and feature races.
2. After the second night of competition, the one tire per race night will begin. Each driver will be permitted to bank one new tire if that driver competes during race night. This banked tire exchange will be performed by Raceway Park tire officials.
3. The tires will be released by track officials to the competitors from the impound area the day of competition. Each driver or their representative must return their tires to the impound area within 15 minutes of the conclusion of the last feature race.
4. If for any reason a driver fails to have his/her tires impounded immediately after the feature race, he/she will have to buy new tires before returning to competition. In addition, the driver will have to compete in two races before receiving any additional tires.

19-12 WHEELBASE & TRACK WIDTH

1. All cars must compete with a minimum of 104" inch wheelbase. When measuring the wheelbase, with one side measurement set at 104" inches. The opposite side wheelbase must measure a minimum of 103 -1/2" inches.
2. Maximum track width center to center 65-*" inches front and rear.

19-13 WEIGHT

1. Base minimum weight 2,850 lbs. total. Minimum right side = 42% of minimum total.

19-14 GROUND CLEARANCE

1. All measurements will be performed with the driver in the car, as raced.
2. Front spoiler 5" inch minimum.
3. Body sides 3" inch minimum.
4. Frame and cross member 3" inch minimum.
5. Centerline of crankshaft 10-1/2" inch minimum.
6. Fuel cell 10" inch minimum.
7. Minimum of 3" inches for all other components, except sway bar, lower control arms and exhaust.
8. Ballast 10" inches minimum behind rear wheels.

19-15 ENGINE

All engines must be located so the center of the forward most spark plug hole is no more than two (2) inches rearward of a line between both lower ball joints. Ford engines setback of up to four (4) inches allowed with ballast weight added to each frame rail, forward of the lower ball joint, ten (10) pounds each side. Ballast weight must be easily removed to allow for inspection.

1. A. Maximum engine displacement will be as follows:
   1. GM 358 cu. in.
   2. Ford 359 cu. in.
   3. Dodge 368 cu. in.
   4. No aluminum, ceramic, or plastic engine blocks.
   5. All engine blocks must be magnetic steel, and OEM stock production.
   6. No titanium parts.
2. Magnetic steel connecting rods only. Oil pan access hole, minimum of one inch diameter, for connecting rod inspection, is mandatory.
3. No external oil pumps or dry sump systems.
4. E.G.R. hole must be plugged. No spacers allowed between intake manifold and cylinder head or cylinder head and exhaust manifold.
   1. On Chrysler engines, Edelbrock manifolds #7176 and #2920 are approved. It is permissible to weld a maximum of *" inch from bolt on flange surface up into the intake port to match the W-2 port design. Ports may be welded only. No grinding or polishing permitted. The Chrysler manifold #4529295, casting #8015, and #P452-9408 are approved. These manifolds must remain OEM stock unaltered. Edelbrook # 2920 and Chrysler # P452-9408 have been added to list of approved intakes.
   2. On Ford engines, Edelbrock #2665 and #2750 have been approved for Ford Cleveland engines. Edelbrock #7181 has been approved for Ford Windsor engines.
   3. On Chevy engines, Edelbrock #7101 has been approved, and 7116 for Vortec heads.
   4. Cast iron or aluminum intakes must remain OEM stock and unaltered meaning no cutting, buffing, grinding, drilling, welding, sanding, porting, or polishing other than described in above rules.
5. E. OEM stock unaltered cast iron cylinder heads only. Chevrolet bow tie and vortec cylinder heads, with a maximum of a 64cc chamber, approved. `No alterations or modifications, meaning any evidence of cutting, buffing, grinding, drilling, welding, sanding, porting, polishing, relieving or addition of material to cylinder head ports, will cause the head to be declared illegal.
   1. Valves must be in OEM stock location.
   2. Head may be cut for valve seals.
   3. No angle milling. Heads may be resurfaced but may not change the surface or the valve angle from stock.
   4. No titanium valves.
   5. Combustion chamber, intake and exhaust ports must be OEM stock original "as cast" configuration.
   6. No chemical or ceramic work allowed in internal area of intake manifold or heads.
   7. Cylinder heads multiple angle valve grinds permitted; however, maximum angle of any cut cannot exceed 75 degrees, with no stepped cuts. Any cut greater than 60 degrees must be done with an angled steel cutter. (See diagram this section)
   8. Optional: Chevy Vortec casting # 12558062 & 12558906 only. Maximum valve size 1.94 intake, and 1.50 exhaust with 11/32 inch stem only. Bowtie Castings Approved #12480034 only. Maximum valve size 2.02 intake, and 1.60 exhaust. Both Vortec and Bowtie cylinder heads maximum 64 cc chamber.
   9. Ford N-heads allowed with SVO aluminum intake.
6. OEM stock appearing valve lifters only. No mushroom or roller type. Stock diameter only.
7. Maximum valve lift of .600" inches MEASURED AT THE VALVE WITH VALVE LASH AS RUN.
   1. No billet camshafts.
   2. No automatic cam timing devices.
   3. No belt drive cams.
   4. Roller Camshafts permitted with 50# weight penalty. 1.7 maximum rocker ratio.  Maximum valve lift .625
8. Maximum compression ratio of 9.5:1
   1. Compression ratio will be determined by use of "Whistler" test equipment. "Whistler" reading will be final.
9. All engines must be located so the center of the forward most spark plug hole is no more than two (2) inches rearward of a line between both lower ball joints. Ford engines setback of up to four (4) inches allowed with ballast weight added to each frame rail forward of the lower ball joints, 10 lbs. Each side. Ballast weight must be easily removed to allow for inspection.

19-16 CARBURETION

A. Carburetor must be approved. Approved is the Holley model #4412 with a venturi size of 1-3/8" inches and maintaining a throttle bore maximum size of 1-11/16" inches. Also approved  is the Dorton model 0-80583-1. The rework guidelines are as follows:

1. Body of Carburetor:
   A) No polishing, grinding or drilling of holes.
   B) Gasket surfaces may be machined for improved sealing.
   C) Any attempt to pull outside air other than what flows through the venturi is not permitted.
2. Choke:
   A) The choke may be removed, all remaining holes must be sealed.
3. Choke Horn:
   A) Choke horn may not be removed.
4. Boosters:
   A) Boosters may not be changed. Size and shape must be OEM unaltered.
   B) Height and location of booster must remain in OEM location.
5. Venturi:
   A) Venturi must be OEM unaltered. Casting ring must not be removed.
6. Base Plate:
   A) Base plate must be OEM unaltered.
7. Butterflies:
   A) Butterflies must be OEM unaltered.
   B) Idle holes may be drilled in butterflies.
   C) Butterfly screw ends may be cut even with shafts, but screw heads must remain OEM size.
8. Throttle Shaft:
   A) Throttle shaft must remain OEM unaltered.
9. Jets:
   A) Jets may be changed. No dial-a-jet devices.

B. A one-piece metal carburetor adapter/ spacer only. Maximum adapter / spacer height 1 ½ inches. Maximum two gaskets, with maximum  total combined thickness of .075” inch.
C. Cold air boxes allowed. Maximum size 3" X 24" inches. Hood must seal at windshield intersection. Must be a 1" space between the windshield and air box opening. No protrusion above hood line.

19-17 FUEL

Approved fuel cells required- 22 gallon maximum mandatory. Fuel cell must be centered in the frame rails.

19-18 EXHAUST & MUFFLERS

1. Exhaust must exit behind driver.
2. Mufflers required. Car cannot exceed 95db at 100’. Required are Brzezinski #184 or Walker #21467, Nelson Co. #86150M.
3. Steel tube exhaust headers to be allowed: maximum diameter of steel tubing 1-5/8" inch measured on the outside. All headers to be manufactured by an exhaust header manufacturer. (No homemade, custom or one-of-a-kind headers.) No step type, reversion, anti-reversion, venturi, multi-sized headers. No coatings, inside or outside. No ceramic or metal bearing paints. No stainless steel headers. No header or exhaust wrap.
4. Maximum size of collector 3" inches, no velocity or cone style collectors. Headers may be of under chassis or crossover style. No 180-degree style, no merged tubes from side to side of engine.
5. Maximum size of tubing from collectors 3" inches outside diameter. May have either dual exhaust with two mufflers with a maximum inlet/outlet tubing size of 3" inches or 2 into 1 Y style exhaust. Single exhaust tubing maximum outside diameter 3-1/2" inches from Y to muffler and through muffler and tailpipe.
6. All cars may have only one merge, X pipe, or Y pipe. X pipe and merge pipes no larger than 3" inches inside.
7. No reversion, venturi, anti-reversion, or step pipes or tubes in any exhaust piping or system on any car.
8. Only one exhaust gasket per side.
9. Mufflers must be hung at both ends with two hangers and two clamps per muffler.

19-19 COOLING SYSTEM

1. Any Radiator allowed..

19-20 ELECTRICAL SYSTEM

1. Reversed mounted starter permitted in Chrysler application only
2. Only two (2) MSD type ignition boxes per car.

19-21 CLUTCH

1. Clutches with diameter of 7-1/4" inches or greater may be used.
2. Clutch must utilize steel discs, pressure plates and housing. Cover may be aluminum.
3. No button, cone, coupler or dog-ear type clutches.
4. Clutch must be of disc, pressure plate design.
5. Operable clutch must remain in bell housing.
6. Flywheel with full sized ring gear only.
7. Safety steel scatter shield bell housing required with stock clutch.

19-22 TRANSMISSION & DRIVELINE

1. Manual transmission with at least 3 forward gears and reverse operable at all times.
2. One piece magnetic steel driveshaft, (2-1/2" inch minimum O.D.) with at least one 360-degree safety hoop mandatory. Driveshaft must be painted white.
3. No quick-change transmission units. No automatic transmissions.
4. Any closed tube conventional rear end acceptable. No aluminum axle tubes.
5. Solid magnetic steel axles only. No gun-drilled or hollow axles.
6. One piece magnetic steel or aluminum drive plates.
7. Stock type single lever shifter only.
8. One-inch access hole in-line with the flywheel ring gear mandatory. This will be used when whistling and checking cam lift. If Officials cannot efficiently make use of this access, driver is responsible for rotating engine by hand - hot or cold - at request of Officials. If this cannot be complied with, car and driver will be disqualified.

19-23 MISCELLANEOUS

1. Two-way radios are optional.
2. All teams must have working scanners tuned to the track frequency during races, with either crew equipped with two way radio to driver or driver listening.
3. All drivers must register their radio frequency with track officials. Those frequencies may be monitored. Inappropriate communication may result in fines, suspensions or both.