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. Maximum tread width front and rear is 84" (inches) measurements will be taken from outside of tires at spindle height, tolerance of 1” (inch) max is allowed.
  3. Absolute minimum height of frame and cross members is 2" (inches) from ground before, during, & after each race event with fully suited driver in the car in the normal sitting position. There is Zero (0) tolerance on frame height. Rear spoiler height maximum must be maintained before, during, & after each race event.
  4. 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.
  5. Aluminum or light alloy frames will not be permitted.

9.1 Center Section Components

  1. The distance from the centerline of the driveline to the left side frame rail, measured anywhere along the frame, must be within 6” (inches) (8” (inches) on 1989 and newer models with the frame rail and roll cage extension) of the distance from the centerline of the centerline of the drive train to the right frame rail. A minimum width of 34” (inches) and a maximum 46” (inches), measured from center of left frame rail to center of right frame rail, must be maintained in the drivers compartment.
  2. The main roll cage bar and the front roll bar legs must be connected with four (4) horizontal door bars on both left and right sides.
  3. The top door bar on each side must have a vertical vent window bar welded upward and connecting to the front roll bar legs. An optional vertical bar may extend from the roof hoop bar radiused outward and turn down to the top horizontal door bar on driver’s side. This minimum 1 1/2” (inch) steel seamless tubing should be located in line with the driver.
  4. The door bars must be convex in shape and spaced from top to bottom as equal as space permits. The door bars must be the same length and have an equal amount of convex in both the right and left sides. The door must have six (6) vertical studs per side of 1 3/4" (inches) by 0.083” (inches) minimum seamless round magnetic steel tubing equally spaced. Two (2) angular gussets must be attached from next to the bottom door bar to the frame rail.
  5. Right side door bars must cover a minimum of 25” (inches) of door length and may be either four (4) horizontal bars with six (6) vertical studs or two (2) horizontal bars and two (2) bars configured in an X design. If the X design is used, a vertical bar must connect through the center of the X from the top horizontal bar to the frame.
  6. A roof support bar must also extend from the right front corner of the roof bar down to the transmission cross member.
  7. All joints where bars meet the main frame and meet the door bars, the roof bar and the rear support bars, MUST have gusset plates for reinforcement.
  8. Side frame rails and rear kick up must be constructed with steel box tubing meeting the ASTMA-500 specifications, and be a minimum of 2” (inches) wide and 3” (inches) high with a minimum .090” (inch) wall thickness.

9.2 Front Sections

  1. The front sub-frame assembly must be constructed using a minimum 0.083” (inches) thickness meeting the ASTMA-500 specifications, 2” (inches) wide and 3” (inches) in height steel tubing.
  2. A minimum of 27” (inches), and a maximum of 32” (inches), measured from center of left frame rail to center of right frame rail, must be maintained from the mounting point of upper control arms forward.
  3. All front sub-frame assemblies must maintain a minimum of 30 degree angle from side frame rails up to the top of the sub-frame.
  4. All sub-frame assembly support bracing shall be a minimum 0.090” (inches) by 1 3/4" (inches) round magnetic steel seamless tubing.
  5. Frame support bars, left and right, must extend from the roll cage to the sub-frame and must have a downward radius bent into the bars before they are welded to the sub-frame.
  6. The left and right support bars must not have any additional braces added between the front leg bars and where they attach to the front sub-frame assembly.
  7. A flex support tube may be added to the front support bar at the radius and extend forward and be attached to a cross member.

9.3 Rear Sections

  1. A minimum width of 31” (inches) and a maximum of 46” (inches), measured from center of left frame rail to center of right frame rail, must be maintained on the rear kick up, with exception for suspension and tire clearance.
  2. All rear kick ups must maintain a minimum of 18 degrees from side frame rails to top of kick up.
  3. A fuel cell reinforcement bar is required and must be installed behind the fuel cell and must be made from minimum of 1 1/2" (inch) seamless tubing with three (3) vertical supports of 1 3/4" (inch) by 0.083” (inch) wall seamless round magnetic steel tubing connecting it to the rear frame cross member.
  4. This reinforcement bar must be as wide as the fuel cell and as low to the ground as the fuel cell with a minimum of two (2) uprights from the reinforcement bar to the rear frame cross member, evenly spaced behind the fuel cell. An X cross member made of one 1” (inch) magnetic steel tubing must be installed beneath the fuel cell from corner to corner. The X cross member must be welded or bolted to the rear frame rails in a secure manner. Two (2) additional support bars, one (1) at each corner of the protective bar, must extend forward and be welded to the rear frame assembly.

9.4 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.

9.5 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.
 

8.0 Drive Train

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

8.1 Engine Location & Mounting

  1. Engine must be centered in frame as measured from center to center of lower ball joints within 2” (inches).
  2. Engine crankshaft center height must be a minimum of 9 1/2" measured from the centerline of the crankshaft/harmonic balancer to the ground.
  3. Engine must be mounted to maintain a minimum clearance of 2” (inches) from the bottom of the oil pan to the ground.
  4. Engine must be mounted in a normal upright position, whereby the cylinder vertical centerline of a 90degree engine shall be a 45-degree angle to a vertical line projected from the ground plane.
  5. Engines must be securely bolted. Engine mounts must be reinforced and must be acceptable to Shangri-La II Speedway Tech Officials.

8.2 Clutches

  1. External Multi-disc clutch designed for racing, minimum of a 7.25” (inch) clutch using one (1), two (2) or three (3) disc design allowed.
  2. Clutch must be disc/pressure plate design clutch assembly. No coupler type/Dog clutch or direct drives.
  3. Limited to magnetic steel discs, Steel or Aluminum pressure plates.
  4. The clutch housing assembly or cover shall be made from aluminum or steel only.
  5. Any single disc OEM production type clutch assembly, with a minimum 10 1/2 inch diameter steel hub disc may be used.
  6. Carbon fiber, Titanium and Ceramic clutch parts of any kind are not allowed this includes Carbon Fiber clutch discs.

8.3 Flywheel

  1. Must have flywheel with starter ring. No carbon fiber or titanium drive train parts or fasteners permitted. Flywheel must be bolted to and turn positive with the crankshaft.

8.4 Bell Housing

  1. Any aluminum, magnesium or steel bell housing allowed. Bell housings utilizing reverse mount starters are allowed.
  2. Bell housing must contain a 2.5” (inch) inspection hole on side or bottom.

8.5 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.
  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.

8.6 Drive Shaft

  1. Drive shaft, universal joints and yokes must be magnetic steel drive shaft and be similar in design to standard production type.
  2. Only a one (1) piece magnetic steel drive shaft will be permitted.
  3. It is MANDATORY that two (2) 360 degree solid magnetic steel brackets, no less than 2” (inches) wide by 1/4" (inch) thick, be placed around the drive shaft and torque arm and be fastened to the cross member of the car.
  4. All drive shafts must be painted white or orange.

8.7 Rear Axle

  1. Aftermarket racing steel spool, steel mini spool. Axle shafts and gears are permitted.
  2. Clip in axles MUST be welded in place.
  3. Aluminum or magnesium quick change and non-quick change center sections equipped with aluminum or magnesium side bells are permitted.
  4. If quick change rear ends are used, only those with magnetic steel spur gears, jackshafts and axle tubes will be permitted.
  5. Quick change rear ends must have the gears in the rear of the quick change front loaders are not permitted.
  6. Ring and pinions in Quick changes must not be smaller than 10 inch. No mini quick changes.
  7. ONLY locked rear drive axle assemblies are permitted at all times during an Event. Limited slip differentials are not permitted.
  8. For purposes of checking a pre-determined final drive gear ratio, when jacked up both rear wheels must rotate in the same direction with each traveling the same rotational distance.
  9. The distance, measured from the center of the rear end housing to the rear hubs, left and right, at the point the wheels bolt on, must be within 3” (inches) in length.
  10. Only magnetic steel axle tubes permitted.
  11. The rear end must be mounted so that the inside edge of the left rear tire is even with or outside the outermost edge of the left side frame rail.
  12. If axle housing support bars are used, they must not have any method of adjustment.
  13. Final gear ratio : nothing over a 500

8.8 Track Bar

  1. Only one (1) Track bar (Pan-Hard or J-Bar) is allowed. Adjusting devices will not be permitted on the interior of the car within the drivers reach.
  2. Any car with an adjustable track bar (Pan-Hard or J-Bar) device inside the interior of the car must have the extension device in a vertical position and mounted as straight up as practical.

8.9 Wheels

  1. Only 15” (inch) diameter 5 lug magnetic steel wheels with a maximum width of 13” (inches) are permitted. 12” (inch) maximum is recommended by most tire manufacturers.
  2. Any offset is permitted.
  3. Wide five bolt pattern is optional.
  4. Bead locks are not permitted.
  5. Wheel Spacers, if used, must be made of steel or aluminum and a minimum 6.75” (6 3/4 inches) in diameter. Shims are not permitted when mounting wheel studs to hubs.
  6. Bleeder valves or pop-off type valves are not permitted.

8.10 Lug Bolts & Nuts

  1. Solid heavy duty 1/2" to 5/8” (inch) magnetic steel lug bolts and standard 1” (inch) hex by 1/2" to 5/8” (inch) thick magnetic steel lug nuts.
  2. Lug stud threads must go through the full thickness of the wheel nut on all four (4) wheels.

8.11 Headers, Mufflers and Exhaust

  1. Shangri-La II Speedway Officials reserve the right to reject improperly mounted exhaust systems
  2. Exhaust headers must be a commercially manufactured header using a steel primary tube size of 1 5/8” (inch) minimum and a maximum of 1 3/4" (inch) outside diameter. 1 5/8" to 1 3/4" (inch) step header permitted.
  3. Must be a conventional four into one collector with a maximum size of 3 1/2" (inch) OD.
  4. Header flange will be 3/8” (inch). No header plates between heads and headers.
  5. No adjustable headers. No inserts allowed in any part of the header or collectors. No 180 degree headers. No stainless headers. No merge. No pyramid. No Try-y or similar style collector permitted.
  6. Heat shields to cover exhaust manifolds cannot exceed 6” (inches) wide or length of the valve cover.
  7. No exhaust pipes allowed in driver's compartment.
  8. No thermal wrap permitted on headers.
  9. No crossover pipes permitted.
  10. All exhaust pipes must be a single round steel 3 1/2" (inch) pipe, with muffler.
  11. All cars must have a working muffler and in "as produced condition" and meet sound level specifications.
  12. No modifications of any type allowed on muffler.
  13. Mufflers must be removable for inspection.
  14. Cars not adhering to this rule or excessively loud cars may not be allowed to compete.
  15. Maximum allowable noise decibel to be 95db (decibels) check from center of track.
  16. Muffler falling off car may result in immediate disqualification.

 


 

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.
   

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.
 

5.0 Distributor

  1. Battery operated ignitions only.
  2. Stock type point distributor or electronic ignition allowed.
  3. Stock firing order for engine must be used.
  4. No ignition boxes or multi-spark systems.
  5. Aftermarket coils must fit in stock location.
  6. May use aftermarket H.E.I. stock replacement type distributor. MSD H.E.I. # 8365 permitted.

5.1 Spark Plugs

  1. Any make or brand of spark plugs may be used.

5.2 Alternator

  1. The alternator system when used must be working within specifications.

5.3 Starter

  1. The self starter must be in working order. Gear reduction starters are acceptable. All cars must be capable of starting under their own power.

5.4 Battery

  1. Only one 12-volt battery.
  2. Battery must be located between the frame rails.
  3. Battery must be securely anchored and mounted inside a spill proof container located under hood or floor of the car. If located under the floor, the battery must be completely encased. If located under the hood, the battery must have suitable cover.
  4. No battery may be forward of the radiator or rear of the rear end housing of the car.

5.5 Electrical Switch Locations

  1. All electrical switches must be located on the dash panel within the driver’s reach.

5.6 Accessories

  1. Cars will not be permitted to carry on board computers, micro-controllers, processors, recording devices, electronic memory chips or digital readout gauges during competition. Radios must be of two-way voice communication type only, independent of the car’s electrical system.
   

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