Limited Late Models Rules

Notice: All model, engine, or equipment changes or modifications not governed by the following Shangri-La II Rules must be submitted for consideration of approval, not less than 30 days prior to the date of intended usage in competition. Equipment will not be considered as having been approved by reason of having passed through inspection unobserved.

All approved cars are eligible for competition in the Shangri-La II Sport Modified Division. Any questions related to rules in this rule book should be addressed to Shangri-La II Track Management.

**UPDATED FOR LIMITED LATE MODELS AS OF 1/3/2013**

1.0 Approved Car Bodies
Any body configuration, Chevy, Ford, Chrysler, Toyota, Etc.,. Body must match make of engine and must look like a car. Must be Aluminum, Fiberglass or steel.  No Wood.

2.0 Floor & Fire Walls

1. A front and rear firewall of a not less than 22 gauge magnetic steel must separate driver from the engine compartment and fuel cell.
2. The front firewall must be positioned below the leading edge of the windshield.
3. The fire walls must be sealed and welded in place.
4. The floor area directly beneath the seat forward to the front engine firewall must be made using a minimum of 1/8” (inch) steel. The remainder of the floor area to the right and rear of the seat must be made from minimum of 22 gauge steel. All floor area panels must be welded together.

2.1 Interior Sheet Metal

1. The driver's compartment may be enclosed with additional sheet metal. All interior sheet metal must be a minimum of 22 gauge steel. Interior sheet metal cannot be higher than or enclose a standard window opening.
2. Sheet metal in driver's compartment must be horizontal from the top of the drive shaft tunnel to the right side door bars or angle from top of drive shaft tunnel upwards to top of right side door bars. Angled or horizontal metal must extend from the rear firewall or back of seat a minimum of 26” (inches) forward.
3. The interior sheet metal behind the rear hoop may be roll formed upward to the top of the rear hoop cross bar. The sheet metal must extend rearward and at the center of the rear axle housing, the sheet metal may angle upward and seal to the bottom of the rear window opening.
4. Interior spoilers, wings, or wind deflectors will not be permitted. Double panels will not be permitted. All interior sheet metal subject to Shangri-La II Speedway Tech Officials approval.

3.0 Car Weights

1. All car weights listed are race ready with driver in sitting position with helmet in lap and hands on the steering wheel, full of fuel, oil and water.
2. 3000 lbs for a Stock Clip/Tube chassis.
3. 2800 lbs for a full frame.
4. 3100 lbs for a full Tube chassis
5. All weights will be taken using the Shangri-La II Speedway Scales. These scales will be the only Official method for determining weight.

4.0 Engine Requirements
Only "small block" cast iron V8 engines with a minimum of 350 cubic inch displacement will be allowed for competition. No aluminum engine blocks allowed.

Note: The track reserves the right to inspect any engine for adherence to these rules at anytime, engines may be whistled and P&G tested at random.

4.1 Engine Displacement

1. To clarify the identification of a "small block" engine, listed below are the basic engines designated and approved as "small block" engines. Any engine NOT listed will be designated as a large block engine and will NOT be permitted, regardless of the engine size.
   
   • General Motors: 350 c.i. (cubic inch) displacement.
   • Ford Motor Company: 351 c.i. (cubic inch) displacement.
   • Chrysler Corporation: 360 c.i. (cubic inch) displacement.
   • American Motors: 360 c.i. (cubic inch) displacement.
   • Dart SHP Series iron block is permitted. 
2. Standard production block with stock external and internal measurements only.
3. Engine displacement may be increased by boring. Formula for determining cubic inch displacement: Bore x Bore x .7854 x Stroke equals cubic inch displacement of each cylinder. The cubic inch displacement of each cylinder added together will determine the total cubic inch displacement of the engine.
4. Maximum bore size is .060 over for Chevy/Ford.  Chrysler .035 over.    (+/-.005 tolerance)

4.2 Cylinder Heads

1. Any 23 degree un-ported cast iron head.
   
   • Ford #M-6049-N351
   • Ford Head - #N352
   Chrysler:
   
   • Chrysler Head - #W-2 Current Design Part No.  P5249769, Casting No. 4532693.
2. No aluminum heads.
3. Maximum intake runner volume of 200 cc’s. No porting to reach maximum runner volume.
4. Manufacturers spec and intake runner CC size will apply on all heads listed. NO TOLERANCE.
5. Heads must retain stock internal and external measurements, no porting, polishing, sand blasting, glass beading, hand grinding, painting or adding material to head will be permitted.
6. External painting of head to match engine is permitted.
7. No acid porting, dipping or etching of any kind, violation of this rule will in disqualification and loss of all winnings for that event. The team will also be stripped of all season points and may be banned from competition at the discretion of Shangri-La II Speedway Management.
8. The maximum compression limit allowed shall be 11.0 to 1 on any cylinder.
9. When calculating the compression ratio, an allowance of one (1) cubic centimeter will be added to the volume for the area around the top of the piston down to the top of the piston ring that will be sealed with grease. * The procedure for checking compression is as follows: Bore x Bore X .7854 x Stroke equals the Cylinder Volume of each cylinder at Bottom Dead Center (bdc) in cubic centimeters. The cylinder head pour volume minus(-) the known volume of the cylinder head plate plus (+) head gasket volume plus (+) 1.00 cc for sealing piston ring plus (+) the cylinder block volume minus(-) the known volume of the block plate equals(=) chamber volume. (Compression ratio = Cylinder Volume plus (+) Chamber Volume)
10. Heat risers may be filled.
11. No combustion chamber modifications are permitted
12. No repositioning head on block. Stock location only.
13. Any attempt to alter, change, or eliminate part numbers will result in that part’s ineligibility.

4.3 Valves & Springs

1. Valves must be identical in appearance and construction to OEM valves.
2. Valve springs of any type may be used, springs must be made of magnetic steel.
3. Minimum valve stem diameter is 11/32” (inch). Valve stem diameter may be undercut to a minimum diameter of 15/16” (inch) in the area of the valve stem from the head of the valve to the bottom of the guide.
4. Valves must be made of solid stainless steel only.
5. Titanium valve spring retainers and keepers are permitted.
6. Multiple angle valve job must maintain valve centerline and guide angle in OEM stock location in relationship to the head.
7. No combustion chamber modifications are permitted
8. Machine cut 1/2" (inch) under valve seat to complete valve job allowed, no polishing or blending.
9. No air directional devices.

4.4 Maximum Valve size Specifications:

All valve sizes are to be measured at the face of the valve.
General Motors: 2.020” (inches) Intake, 1.600” (inches) Exhaust
Ford Windsor: 1.844” (inches) Intake, 1.546” (inches) Exhaust
Ford Cleveland: 2.046” (inches) Intake, 1.546” (inches) Exhaust
Ford #M-6049-N351: 2.020” (inches) Intake, 1.600” (inches) Exhaust
Chrysler: 2.020” (inches) Intake, 1.625” (inches) Exhaust

4.5 Push Rods

1. Push rods must be magnetic steel only.

4.6 Rocker Arms

1. Any type stud mounted Roller Rocker arms are allowed. No shaft rockers allowed.

4.7 Stud Girdles

1. Stud Girdles are allowed.

4.8 Pistons, Rods, Cams, Crankshaft

1. Steel connecting rods required, no titanium, aluminum or stainless steel connecting rods allowed.
2. The following connecting rods will be the only ones allowed:
   Chevrolet: Aftermarket 5.700” Forged or Billet - Minimum Weight 575 Total Grams. Aftermarket 6.000” Forged or Billet - Minimum Weight 600 Total Grams.
   Ford: Maximum Ford Rod Length is 6.000”.
   Chrysler: Maximum Chrysler Rod Length is 6.125”.
3. Machining for bushing or full floating is allowed.
4. No de-burring, de-flashing, polishing abrasive cleaning or lightening.
5. No titanium, aluminum, max-light aerospace alloy rods allowed.
6. Any flat top or dished piston permitted. Valve relief may be cut into piston. Pistons may not exceed engine compression rule.
7. Any steel wrist pin may be used.
8. No dome or pop-up pistons are allowed.
9. All pistons must utilize the mandatory three (3) rings only.
10. No part of the piston may protrude above the deck of the block.
11. Any flat tappet camshaft permitted. Roller cams are strictly prohibited.
12. No mushroom or roller type lifters permitted.
13. Lifters must be stock diameter.
14. No roller camshaft bearings.

4.9 Crankshaft

1. Only stock production type crankshaft can be used. Standard steel or cast iron. Aftermarket crankshafts must be identical to stock OEM in appearance, construction, weight and journal size.
2. Counterweights must be the same shape and size of stock OEM crankshaft.
3. Minimum crankshaft weight 48 lbs.
4. Chevrolet must use large journal size crankshaft. Stroke 3.480 only (+ or - .005).
5. Counterweights must remain stock. No undercutting. No knife edging, tapering or altering in any way, except for normal balancing, by drilling, turning, or adding weight.
6. Rod journals stock diameter with tolerance of .020, light deburring permitted, however forging or casting flashings must remain.
7. Engine crankshaft center height must be a minimum of 9 1/2" (inches) measured from the centerline of the crankshaft/harmonic balancer to the ground.

4.10 Timing Chain

1. Any timing chain and gears may be used. Degree bushing and offset crank gear keys may be used.
2. Gear drives may be used.

4.11 Vibration Damper

1. Stock-type steel or cast iron. Dampers may not to be machined or altered in any way.
2. Harmonic balancer minimum diameter 6.25 inches. Fluid dampener is legal.

4.12 Oiling System

1. Oil system must be Wet Sump type, Dry sump oil systems are not permitted.
2. Internal oil pumps driven from the distributor are required.
3. Magnetic steel oil pans only.
4. An inspection hole is required on the left side of the oil pan.
5. The inspection hole must be a minimum of 1 1/4" (inch) I.D. It must be 9 1/2" (inches) from the rear block face to the centerline of the inspection hole or 4 1/2" (inches) from the front block face to the centerline of the inspection hole and 1 1/4" (inches) from oil pan rail.
6. There may not be any obstruction of view from the inspection hole to view crank and rods.

4.13 Intake Manifolds

1. The following manifolds are approved for use:
   Chevrolet: Edelbrock Performer (Part # 2101)
2. Chevrolet: Edelbrock Victor Jr (Part # 2901)
   Ford: Part # M-9424-C358
   Ford: Edelbrock Performer (Part # 2181)
   Ford: Edelbrock (Part # 2750)
   Chrysler: Edelbrock Performer (Part # 2176)
3. Ford: Part # 2940
4. Chrysler: Mopar (Part # P5249572AB)

1. The manifold must remain as produced by the original manufacturer and must be stamped with the part number. The manifold may not be modified, painted, polished, or coated inside or outside with the exception of external paint.
2. No acid porting or etching of any kind, violation of this rule will result in disqualification and loss of all winnings for that event. The team will also be stripped of all season points and may be banned from competition at the discretion of Shangri-La II Speedway Management.
3. No air gap intakes are allowed.

4.14 Carburetors

1. Carburetor is limited to one (1) unaltered stock 4412 Holley 500 cfm two (2) barrel, Must pass gauge inspection. HP Carburetor is allowed.
   

   Venturi Bore:	1.373” – 1.377”
   Booster Outside Diameter:	.620” (+ or -) .10”
   Booster Inside Diameter:	.390” (+ or -) .003”
   Throttle Bore:	1.6855” – 1.6856”
   Combined Throttle Shaft and Plate:	.1868” - .2008”

2. Choke may be removed and all holes must be permanently sealed. Choke horn may not be removed or altered.
3. Boosters may not be altered in any manner including size, shape or height.
4. Venturi area must not be altered in any manner.
5. Stock butterflies must not be thinned or tapered. Idle holes may be drilled in butterflies. Screw ends may be cut even with shafts, but screw heads must remain standard.
6. Throttle shafts must remain standard and must not be cut or thinned in any manner. Any attempt to pull outside air other than through the venture is not permitted.
7. No alterations will be allowed including but not limited to polishing, grinding, or drilling holes in the body of the carburetor.
8. Metering block must maintain stock configuration. After market metering blocks are not allowed. Resizing of bleeds are permitted.
9. Carburetor must be mounted in stock configuration.
10. Carburetor must pass all Shangri-La II Speedway gauge checks to be eligible for competition.

4.15 Carburetor Throttle Linkage

1. All linkage must be mechanical type. No cable type. Two springs MANDATORY.
2. A toe strap is MANDATORY.

4.16 Carburetor Spacer and Gaskets

1. Only a 1 piece carburetor spacer, maximum 1” (inch) in thickness may be installed between the intake manifold and the carburetor. No spacer allowed if 1.0” (inch) is built into intake.
2. Only 2 paper gaskets (1 per side) with a maximum thickness of 0.075” (inch) will be permitted. Gaskets may be altered to match carburetor base openings.

4.17 Carburetor Jets

1. Carburetor jets must be the same type as supplied by the carburetor manufacturer.

5.0 Electrical

1. Only single MSD Analog 6 Series Amplifier box.  Must not be programmable, computerized or contain memory circuits.
2. May not be altered in any way.
3. Traction Control of any kind is prohibited.

6.0 Fuel Cell

1. The maximum fuel cell capacity, including the filler spout and overflow, shall not exceed 24 (U.S.) gallons.
2. Must be enclosed in a 22 gauge metal canister and installed in a safe manner.
3. Fuel cell container size shall be 25” (inches) by 16 3/4" (inches) by 13 5/8” (inches) inside dimensions.
4. The Interior sheet metal must allow access to top of fuel cell for inspection.
5. The nominal fuel cell dimensions are 24 1/4" (inches) by 16 3/8” (inches) by 13 1/4” (inches).
6. Materials other than standard foam, from an approved fuel cell manufacturer, are not permitted.
7. The maximum filler spout size is 4” (inches) by 8” (inches) by 18” (inches).
8. Pressure systems will not be permitted. Any concealed pressure type containers, feed lines or actuating mechanism will not be permitted, even if inoperable.
9. Must have flapper/ball valve assembly in cell to prevent spillage when upset. The fuel cell check valve vent pipe neck inside diameter shall not exceed one 1” (inch) maximum.
10. A single, one 1” (inch) maximum vent is required to outside of body at left rear corner. A fuel vent flap valve must be used. Must have a check valve in vent tube to prevent spillage.
11. The fuel cell vent flexible hose shall have a maximum inside diameter of 1 1/4" (inches) and a maximum length of 60” (inches) when measured from the outside end of the fuel cell check vale vent pipe to the top of the fuel cell fill plate. A screen cap with a maximum diameter of 1 1/4" (inches) may be placed over the vent.
12. Fuel cell and fuel cell container must be installed as far forward as possible in trunk compartment behind the rear axle.
13. Fuel cell must have a minimum ground clearance height of 6” (inches) from the track.

6.1 Fuel Pumps

1. Mechanical fuel pumps only, no electric fuel pumps or piston pumps are allowed.

6.2 Fuel Lines

1. Either (or both) right or left side pickup in fuel cell may be used as approved by Shangri-La II Speedway Tech Officials.
2. ONLY one (1) fuel line permitted from fuel cell to fuel pump.
3. All fuel lines are subject to Shangri-La II Speedway Tech Officials approval.
4. The fuel lines from the fuel cell to the carburetor may be relocated to prevent vapor lock, but must remain under floor of car unless otherwise approved.
5. When the fuel line runs through the right side of the driver’s compartment, it must be enclosed in a 1” (inch) outside diameter magnetic steel tube.
6. Track approved check valve mounted at the line outlet on the fuel cell is recommended.
7. Additional lines or extra length may not be used on the fuel system, Extra fuel lines or fuel cells, concealed or otherwise are prohibited.

7.0 Radiator

1. Must have radiator contained under the hood of the car in front of engine.
2. Radiator overflow pipe may be relocated and a minimum one (1) gallon overflow can is required.
3. Radiator dust screens are permitted.
4. Radiator must be copper, brass or aluminum.
5. Radiator installation must be acceptable to Shangri-La II Speedway Tech Officials.

7.1 Fan Shroud & Ducts

1. When ducting air from the nose housing to the radiator, air directional shields are permitted within the duct.

7.2 Cooling & Liquids

1. Absolutely no anti-freeze liquid allowed, water only.
2. Products such as Liquid Cool and Water Wetter are allowed.
3. Icing, Freon type chemicals or refrigerants may not be used in or near the engine compartment.
4. Portable cooling machines or devices will not be permitted.

7.3 Water Pump

1. Only OEM type steel or aluminum mechanical water pump in stock location, turning in the same direction as the crankshaft rotation are permitted.
2. Water pump impellers may be altered but coolant flow must be in the same direction as the production engine.

8.0 Drive Train

1. No carbon fiber or titanium products allowed without Speedway approval.

8.1 Transmission

1. Only standard production OEM type Muncie or T-10 manual three (3) or four (4) speed transmissions are permitted.
2. First gear may be removed and replaced with a spacer.
3. Automatic transmissions are allowed.
4. Only aluminum, or steel transmission housings are permitted.
5. Only OEM type gears are permitted - no straight cut gears.
6. All transmissions must have a constant engagement of the input shaft with gear and countershaft with cluster and reverse gears.
7. Any transmission gear higher than 1.18 to 1 or method of obtaining a ratio of higher than 1.18 to 1 will not be permitted.
8. The only high gear transmission ratio allowed will be 1 to 1.
9. A forward gear and reverse gear MUST be in working order.
10. Only manual shift linkage is permitted on the transmission.
11. Fire resistant type shifter boots are required.
12. The Jerico transmission will not be permitted.
13. All transmissions must be approved by Shangri-La II Tech Officials.

9.0 Wheelbase, Tread Width, Frame Height

1. Minimum wheelbase is 107" (inches) on either side. The left side wheelbase must be +/- 1" (inch) of right side. Maximum wheelbase is 108" (inches).
2. No more than 80" treadwidth.  Measurement will taked side wall to side wall.  Outside to Outside.
3. All frame components must be made of steel and welded. Holes drilled in frames, frame supports, and cross members with the intent of making the metal lighter are not permitted.
4. Aluminum or light alloy frames will not be permitted.

9.1 Steering Components

1. Rack and pinion steering is allowed.
2. All cars must be equipped with a magnetic steel steering shaft.
3. Tie rods, drag links and component parts must be heavy duty.
4. Interchangeable pitman arms may be used. Pitman arms may not be drilled for weight reduction.
5. The use of universal joints in steering shaft must be approved by the Shangri-La II Speedway Tech Officials.
6. The power steering pump must be mounted and driven off the front of the engine.

9.2 Brakes

1. Hydraulically activated, four wheel disc brakes are mandatory, brakes must be in a good operating condition on all four wheels at all times.
2. Any aftermarket caliper may be used.
3. Only one (1) brake caliper per wheel using only two (2) brake pads per caliper will be permitted.
4. Inboard brakes are not allowed.
5. Electric wheel speed sensors or brake actuators will not be permitted.
6. Power assisted braking systems will not be permitted.
7. Only a single brake bias system which connects to the balance bar of the brake pedal assembly will be permitted.
8. Inline brake proportioning systems will not be permitted.
9. Master cylinders and reservoirs should be mounted on the engine side of the front firewall.
10. No carbon fiber, titanium or ceramic brake components are allowed.
11. Any magnetic steel or cast iron, non-coated rotor allowed
12. One (1) air duct per wheel may be used for brake cooling.
13. Maximum dimension of front brake air scoops is 3” (inches) by 8” (inches) when mounted to the front sub-frame or front bumper.
14. If the brake scoops are not operational, they must be blocked off. Screens and air ducts, from the opening to the brakes.
15. All scoops must be acceptable to the Shangri-La II Speedway Tech Officials.
16. Brake fluid recirculating devices will not be permitted.

9.6 Coilover Rear Springs

1. Coilover springs must steel and must be constructed with both coil ends closed and ground, type of springs including height and wire diameter is optional.
2. One spring per wheel, Steel only.
3. Spring rubbers are permitted and must be removed manually. No removal devices may extend out side the body of the car or be accessible in the driver’s compartment.

9.7 Coilover Front Springs

1. Coilover springs must steel and must be constructed with both coil ends closed and ground, type of springs including height and wire diameter is optional.
2. One spring per wheel, Steel only.
3. Spring rubbers are permitted and must be removed manually. No removal devices may extend out side the body of the car or be accessible in the driver’s compartment.
4. Coilover must mount to lower control arm.
5. Strut bars will not be permitted for mounting of coilover.

9.8 Shocks

1. All shocks and internal shock components are subject to approval by Shangri-La II Speedway Tech Officials.
2. Coil over shock absorbers may be used. Shock absorbers and coilover shock and spring, by visual reference, must remain within the outline of the body and no holes can be cut in the outer body for the mounting of shocks.
3. No shock with a published racers net price greater than $300.00 U.S. currency will be permitted. Any shock to be approved must be available to all competitors.
4. Maximum of 1 shock absorber per wheel is permitted.
5. No experimental shocks.
6. External shock absorber reservoirs will not be permitted.
7. Quick Disconnect shocks not permitted, shocks must be securely bolted.
8. No in-car, electronic, or remote (cockpit) adjustable shocks are permitted.
9. External Schrader valves to pressurize shocks with nitrogen are permitted

9.9 Sway Bars

1. Only magnetic steel front sway bars are permitted. Rear sway bars (anti-roll bars) will not be permitted.

9.10 A-Frames & Lower Control Arms

1. Upper A-Frames and Lower Control Arms must be acceptable to the Shangri-La II Speedway Tech Officials.
2. Independent front suspension is mandatory with articulating upper and lower control arms.
3. When attaching upper control arms to the mounting plate, only standard type castor/camber shims or washers will be permitted.
4. Ball joint type is optional. Mono balls are allowed.

9.11 Spindles, Wheel Bearings & Hubs

1. Heavy-duty magnetic steel spindles and wheel bearings are compulsory.
2. Aluminum or magnetic steel hubs are permitted.
3. The front spindles must be attached to the frame using steel cables and be secured in a manner acceptable to the Shangri-La II Speedway Tech Officials.