Four Cylinder Rules

General

Senior Division: This division is designed to be an amateur division. Drivers may not compete in any other division.

Junior Division: This division is restricted to 14 – 17 years for age or 12 years and up with previous racing experience (i.e. Microds, Bandoleros, etc…) Drivers may not compete in any other division. Drivers with previous racing experience in any other division (i.e. Street Stocks, SST, etc…) are not eligible. Over competitive cars or drivers may be moved to Senior Division.

 

Building 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.

Shangri-La II maintains the right to amend the rules at anytime to maintain a competitive racing environment. 


 

Bodies

1.0 Approved Models

  1. All cars must be 4-cylinder front or rear wheel drive American or foreign stock passenger cars with a wheelbase not exceeding 105”.
  2. Naturally aspirated only, no turbocharged or supercharged engines.
  3. No pick-up trucks, jeeps, station wagons, two seat coupes or convertibles permitted.
  4. Rear-engine, mid-engine, four wheel drive and all wheel drive vehicles will not be permitted.
  5. No multiple carburetors, rotary engines, Cosworth engines or DOHC V-Tech engines (SOHC V-Tech engines are allowed).
  6. OEM factory stock fuel injection only.

1.1 General Car Body Requirements

  1. The car body must be STOCK OEM and retain all factory listed dimensions, lines and angles.
  2. Wheel openings may be trimmed for tire clearance.
  3. All bolt-on components, body molding including door handles mirrors and glass must be removed.
  4. Doors must be welded or securely fastened front and back.
  5. Inner fenders must remain stock OEM.
  6. The headlight and tail light openings must be covered with sheet metal or lexan.
  7. The front core support may be removed.

1.1.1 Body Positioning and Mounting

  1. The body must be mounted in stock factory location the body may not be lowered on the frame.

1.1.2 Hood, Roof and Trunk Lid

  1. Hoods must remain stock and lie flat on fenders and remain sealed to windshields at all times. Inner bracing may be removed.
  2. No hood scoops, no holes in hood and no openings.
  3. A minimum of two (2) hood pins are required to secure the front of the hood, with 1 located on each side of the hood. An additional hood pin located in the middle of the hood is recommended. Hood Hinges may be retained, if hinges are removed two (2) hood pins will be required to secure the rear of the hood, with 1 located on each side of the hood.
  4. Trunk Lids must remain stock and lie flat on fenders. Inner bracing may be removed.
  5. A minimum of two (2) hood pins are required to secure the rear of the trunk lid, with 1 located on each side of the trunk lid. Trunk Lid Hinges may be retained, if hinges are removed two (2) hood pins will be required to secure the front of the trunk lid, with 1 located on each side of the trunk lid.
  6. For all hatchback cars hatch must be welded or bolted shut. Inner bracing may be removed.
  7. Sun/moon roofs must be completely covered and welded with 24 gauge (.024") minimum magnetic sheet steel, and be neat appearing.

1.1.3 Taillight Panel

  1. Tail-light panel must be completely enclosed (no holes).

1.1.4 Ground Clearance

  1. No part of the body, and/or chassis may extend past the lowest point of the bottom of the main frame, left or right. Frame must maintain a minimum ground clearance of 5.0” (inches). Ground clearance measurement is measured from the lowest point of the chassis and/or body, and to be taken with the fully-suited driver in the car and in normal sitting position. Measurements can be taken prior to, or following any given event. There is Zero (0) tolerance.

1.1.5 Vanes, Skirts Air Dams, Vents and Ducts

  1. The only lower side skirts that are allowed are those that come factory stock on the car being used. No aftermarket lower side skirts, body extensions or flares are permitted.
  2. Additional vanes, air dams, front spoilers, flared skirts or other added devices or sheet metal to divert or direct airflow are not allowed.

 

1.1.6 Windshield & Rear Window

  1. All glass, except the windshield must be removed. Glass windshields must have four 3” (inch) tabs (2 located on top, 2 located on bottom of windshield).
  2. Windshields may be replaced with full 1/8" (inch) Lexan/Polycarbonate windshield.
  3. Windshields may be replaced with screen as an alternative to a windshield. No chicken wire or aluminum screen allowed. All screen must be approved by Shangri-La II Tech Officials.
  4. Lexan/Polycarbonate may be used in front of the driver with screen placed in remaining area. No chicken wire or aluminum screen allowed. All screen must be approved by Shangri-La II Tech Officials.
  5. All windshield’s including screen must have a minimum of two (2) internal 1” wide aluminum or steel braces spaced approximately 4" (inches) to 6” (inches) apart and roughly centered in windshield.
  6. Full rear windows are recommended. If you have one it must be 1/8" (inch) Lexan or Plexiglas type, mounted securely, with at least two (2) internal aluminum or steel braces to prevent any collapsing.
  7. Lexan Quarter windows are allowed but not required.
  8. Door windows are not permitted.

1.1.7 Bumpers, Noses and NERF Bars

  1. Stock or Aftermarket stock appearing front nose/bumper cover may be used. Must be mounted in the stock position, No alterations or cutting allowed. When running an aftermarket front nose/bumper cover "stock appearing" means that it must resemble the stock part (i.e. If you running a Mustang the nose must look like a Mustang, etc...).
  2. Stock or Aftermarket stock appearing front tail/bumper cover may be used. Must be mounted in the stock position, No alterations or cutting allowed. When running an aftermarket front tail/bumper cover "stock appearing" means that it must resemble the stock part (i.e. If you running a Mustang the nose must look like a Mustang, etc...).
  3. Outside bumper reinforcement/bracing is prohibited.
  4. A maximum of 2 support bars may be used behind the nose and must be made of a minimum of 1” (inch) and maximum of 1.750” (inch) Round Tubing not exceeding .095” (inch) wall thickness.
  5. All cars must provide hooks and/or alternate method for towing, in both the front and rear and may be located under hood and/or trunk.
  6. Only 1 external nerf bar is allowed, maximum 1” (inch), with no sharp edges and must be skin tight to the body and located between front and rear wheels, parallel to the ground.

1.1.8 Spoilers

  1. No front spoilers are permitted.
  2. A Non- adjustable Rear Spoiler not exceeding 6" (inches) in height and fabricated from aluminum or .250” Lexan is allowed.
  3. Factory Rear Spoilers are also permitted on the rear and must be make/model correct.
  4. The spoiler shall not exceed the width of the rear quarter panels and must be attached to and centered on the rear of the deck lid.
  5. Rudders, side enclosures or bracing, lips, bends or forward mounting brackets are strictly prohibited.
  6. No decals will be allowed on the spoiler at anytime.

 

     

    Interior

    2.0 Doors/Floor/Fire Walls

    1. Interior of car must be completely enclosed in respect to engine compartment, track surface, wheel wells, and rear (fuel cell) compartments. No air ducts through the firewall and/or floor are permitted.
    2. Any fabricated sheet metal must be minimum 20 gauge steel.
    3. Anything that bolts in place may be removed, all flammable material must be removed.
    4. Front and Rear firewalls (engine and trunk area) are required, rear firewall may be fabricated or stock, all holes must be covered using a minimum of 20 gauge steel.
    5. Hatchback cars must fabricate a rear firewall at floor level using a minimum of 20 gauge steel to protect driver from the fuel cell.
    6. Driver Seat location must remain in stock position.
    7. Floors must remain stock.
    8. Trunk floor may be modified to accommodate the fuel cell.

    2.1 Dashboard

    1. OEM dashboard may be removed and/or replaced with a fabricated dashboard or gauge panel.
    2. Aftermarket gauges are allowed.

     

       

      Weight

      3.0 Car Weights

      1. All RWD cars with Hydraulic Lifters must weigh 1 lb/cc with a minimum weight of 2100 lbs. with driver after race.
      2. All RWD cars with Solid Lifters must add an additional 50 lbs of weight.
      3. All SOHC FWD cars must weigh 1 lb/cc with a minimum weight of 2100 lbs with driver after race.
      4. All DOHC FWD cars must weigh 1.2 lb/cc with a minimum weight of 2150 lbs with driver after race.
      5. All Multi-Port Fuel Injection cars must weigh 1.2 lb/cc plus 50 lbs with a minimum weight of 2150 lbs with driver after race.
      6. Maximum left side weight percentage for ALL cars will be 55% before, during and after event with No Allowances
      7. No weight may be located within the driver’s compartment.
      8. Added weight must be in solid blocks, no less than five (5) pounds, no pellets, sandbags, etc.
      9. All weight must be securely bolted in place with a minimum of one 1/2” (inch) grade 5 bolt per fifteen pounds (15 lbs) of ballast each bolt must have a flat washer against the face of the ballast and a lock nut. Weight may not protrude below the frame rails.
      10. All weights must be painted white and have the car number on each weight. Dislodged weight can not be returned to car for weighing after the race.
      11. No ballast adjustment devices permitted on car. Weight transfer devices of any type may not be activated by the driver.
       

      Engines

      4.0 Engine Requirements (Updated 12/4/12)

      1. The engine block must be stock OEM for your car make. The engine must be the one that either comes with the car being used or is available in your car make as a factory item, including all engine accessories (ex. Ford engine in Ford car, Chevy engine in Chevy car, etc…).
      2. Aftermarket air filters, pulleys, valve covers and oil pan are allowed.
      3. Engine maximum displacement is 2560cc.  Maximum engine compression 180 lbs.
      4. No high performance engines (such as DOHC V-Tech).
      5. No cross breeding or interchanging of engine parts permitted.

      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 Block

      1. Standard production block with a maximum 0.060 overbore. Block deck milling and align honing is allowed.

      4.2 Cylinder Heads

      1. Stock standard production cylinder heads only.
      2. No porting, polishing, sand blasting, glass beading, hand grinding, painting or adding material to head will be permitted.
      3. 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.
      4. No modifications allowed to the combustion chamber including but not limited to cutting, blending or polishing.
      5. Any attempt to alter, change, or eliminate part numbers will result in that part’s ineligibility.

      4.3 Valves, Springs

      1. Stock or stock type replacement valves,
      2. Steel valves only with stock valve stem diameter.
      3. No “BLEED OFF” type valve stems.
      4. Stock diameter valve spring size only.
      5. Steel valve spring retainers only.
      6. Maximum valve size is 1.830” (inches) Intake, 1.590” (inches) Exhaust

      4.4 Rocker Arms

      1. OEM rocker arms only will be permitted.

      4.5 Pistons, Rods, Cams, Timing Chain, Crankshaft

      1. Steel connecting rods required, no titanium, aluminum or stainless steel connecting rods allowed.
      2. Only Stock or after market forged I beam connecting rods are approved for competition.
      3. 5.2 - 5.7” (inch) length rod permitted, must maintain stock stroke.
      4. Stock stroke crank shafts only. Crank casting number must not be removed.
      5. Only stock production type crankshafts may be used, standard steel or cast iron.
      6. Aftermarket crankshafts must be identical to stock OEM in appearance, construction,  weight and journal size. Counterweights must be the same shape and size of a stock OEM crankshaft.
      7. Counterweights may not be altered in any way. Normal balancing only.
      8. Flat top or dish pistons only.
      9. All pistons must utilize the mandatory three (3) rings only.
      10. No lightweight piston or piston pins.
      11. No portion of the Pistons may protrude above the block deck surface. With the exception of engines that are factory built with pistons that protrude above the deck surface. Not to exceed .010 of factory specification.
      12. OEM manufactured Hydraulic or Solid camshafts may be used. Stock diameter hydraulic lifters only. Maximum lift is 0.510 checked at the valve.
      13. Aftermarket cams allowed.
      14. No roller cams or lifters of any type, no mushroom tappets.
      15. Only stock OEM cam followers or rocker arms on push rod motors are allowed.
      16. Any timing chain may be used. Degree bushings and offset crank gear keys may be used. Gear drive or belt drive types not allowed.

      4.6 Oil Pan & Oiling System

      1. Oil system may be of Wet Sump type only.
      2. Steel Oil Pan only, stock oil pans are allowed. No aluminum oil pans permitted.
      3. A 1” (inch) diameter inspection plug is required in oil pan. There may not be any obstruction of view from the inspection hole to view crank and rods.
      4. If view is obstructed removal of oil pan may be required for inspection.
      5. No oil coolers allowed.

      4.7 Intake Manifolds

      1. The Intake 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.
      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.

      4.8 Carburetors

      1. The Holley 350 CFM, 2 BBL Carburetor Part # 0-7448 or Kieth Dorton Part # 0-80787-1 are the only carburetor’s allowed for FWD cars.
      2. RWD cars will be allowed to run the above 350 CFM Carburetor or the Holley Part # 4412 500 CFM, 2 BBL Carburetor.
      3. The carburetor must be “Stock out of the box”.
      4. The only changes that will be allowed are as follows: The Choke Plate and Shaft may be removed, Jets, Power Valve, Accelerator Pump Cam, and Accelerator Pump Discharge Nozzles may be changed. Idle Holes may be drilled in the Butterflies. No other changes allowed.
      5. No Reshaping, Polishing, Grinding or Drilling Allowed.
      6. No Adjustable (Jetted) Air Bleeds or Circuits.
      7. Gaskets must remain unaltered.
      8. HP Carburetor is not allowed.
      9. No “HP” parts allowed.
      10. No chrome carburetors allowed.
      11. Carburetor must be mounted in stock configuration.
      12. Carburetor must pass all Shangri-La II Speedway gauge checks to be eligible for competition.

      4.9 Fuel Injection

      1. Must be stock for the make, and year of engine being used (Strictly Enforced).
      2. Multi-Port Fuel Injection Systems are allowed. See Weight section for weight requirements.
      3. In the case of T.B.I. engines, the T.B.I. can only have one injector and the system must operate using factory fuel pressure.

      4.10 Carburetor Throttle Linkage

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

      4.11 Carburetor Spacer and Gaskets

      1. No alterations allowed to carburetor spacer.
      2. Only a 1 piece carburetor spacer made of aluminum or pheonolic plastic, maximum 1” inch in thickness may be installed between the intake manifold and the carburetor.
      3. The top (carb side) and the bottom (manifold side) must be parallel, No wedge shape allowed.
      4. Spacer must have 2 Port Holes 1.750” (maximum size) and must be vertical top to bottom (90 Degrees). No beveling, tapering, grooving, flaring, or radiusing of port holes. Spacer may not be stepped or undercut.
      5. Port Holes must be same size and shape at the top and bottom and must pass through the entire spacer adapter with no additional holes or channels that will allow air to enter the engine.
      6. 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.

      4.12 Carburetor Jets

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

      4.13 Carburetor Air Filter

      1. Aftermarket air cleaners are allowed.
      2. No air induction plastic carburetor inserts or other devices to direct air into carburetor
      3. No air diffusers are allowed.
      4. Air must be filtered through the element.
      5. No shield around air cleaner will be permitted.
      6. Air cleaners cannot be removed during practice or competition.

      4.14 Air Intake

      1. No cowl air induction is permitted. Absolutely no air ducts or baffles permitted on or leading to the air cleaner or element.

       

         

        Electrical

        5.0 Ignition

        1. All ignition systems must be acceptable to Shangri-La II Tech Officials.
        2. No high performance ignition or ignition boxes allowed.
        3. Multiple spark ignitions are not allowed.
        4. Traction Control of any type is strictly prohibited.
        5. The distributor must mount in the stock location and maintain the same firing order as a factory produced engine for the make of engine being used.
        6. No adjustments allowed inside distributor cap, no adjustable timing controls of any type permitted.
        7. Stock Computer and computer chips only.

        5.1 Ignition Kill Switch

        1. All cars must have a clearly marked On/Off master switch that cuts all power to the engine and ignition system located within reach of the driver while in a normal sitting position and accessible from outside the car.
        2. It is Highly Recommended that the driver must also have an ignition kill switch located on the steering wheel that cuts power to the ignition system in an emergency.

        5.2 Spark Plugs

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

        5.3 Alternator

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

        5.4 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.
        2. After a race is underway, cars may be started by hand pushing in the pit area only, but under no circumstances is any car permitted to be pushed onto the race track from pit area.

        5.5 Battery

        1. Only one 12-volt battery allowed, Dry Cell batteries are recommended.
        2. Battery may be mounted in a spill proof non-conductive Marine-type container on right side floor of car inside frame rail in a steel box made of no less than 20 gauge steel, completely sealed from the driver and bolted down. It is recommended that the battery be located within the fuel cell area of the car and securely mounted and in a non-conductive Marine-type container.

        5.6 Electrical Switch Locations

        1. All electrical switches must be located within the driver’s reach. A labeled on/off master switch must be located within reach of the driver’s side window opening and effectively kill power from the battery to the car’s ignition system.

        5.7 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 one-way scanner type only, independent of the car’s electrical system.
         

        Fuel System

        6.0 Fuel Tanks/Cell:  Updated 3/13/12 - Gas Tanks ARE allowed if mounted in FRONT of rear axle.  If mounted BEHIND rear axle, Fuel Cells are REQUIRED

        1. A Fuel Cell with a maximum size of 8 gallons (U.S.), rectangular or square in shape only is required. All fuel cells must contain fuel cell foam and may be of Steel Can type construction w/bladder or Polyethylene outer shell type construction.
        2. Fuel cell must have a minimum ground clearance height of 12.0” (inches) from the track.
        3. Must be protected by 18 gauge steel on both sides, front and bottom or be in a metal canister and must be centered between the frame rails.
        4. Must have flapper/ball valve assembly in cell to prevent spillage when upset.
        5. Fuel Cell rear must be protected by a loop constructed of steel tubing minimum 1.250” (inch) diameter tied into the Roll Cage.
        6. Must have a check valve in vent tube to prevent spillage. Vent line must not be excessive in length.
        7. Fuel cell vent must be located at the left rear corner of the trunk.

        6.1 Fuel Pumps

        1. Stock OEM type fuel pump required (i.e. if the car came with a mechanical fuel pump it must remain mechanical).
        2. For cars using an electric fuel pump it must be enclosed in a steel box and located as close to the fuel cell as possible. The fuel pump must be tied in with the oil pressure switch, no oil pressure – no fuel.
        3. Only one fuel line between fuel cell and fuel pump is allowed.

        6.2 Emergency Fuel Shutoff

        1. All cars must have an on/off fuel system shutoff valve, must be clearly marked and be within drivers reach as well as accessible form outside of the car.
         

        Cooling System

        7.0 Radiator

        1. Must have stock appearing radiator contained under the hood of the car.
        2. Radiator must be stock type made of copper, brass or aluminum only with a minimum of a 1 gallon overflow tank. Overflow must blow on right lower quarter of windshield.
        3. Stock steel bladed fans or electric fans are allowed.
        4. An approved loop constructed of steel tubing minimum 1.250” (inch) diameter tied into the chassis or roll cage is permitted to protect the radiator, must be behind grille.

        7.1 Liquids

        1. Absolutely no anti-freeze liquid allowed, water only.
        2. Products such as Liquid Cool and Water Wetter are allowed.

        7.2 Water Pump

        1. Must have stock OEM or stock replacement type water pump only.
        2. Double clamps recommended on all hoses.
         

        Drive Train & Running Gear

        8.0 Drive Train

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

        8.1 Engine Location

        1. Engine/drive line must be located in stock position.
        2. Engine crankshaft center height must be a minimum of 15" measured from the centerline of the crankshaft/harmonic balancer to the ground.
        3. Steel or Rubber motor mounts are permitted
        4. Rubber mounted engines must be chained down for safety.
        5. Engine must be mounted in a normal upright position.

        8.2 Vibration Damper

        1. Must be OEM Type steel or cast iron only.

        8.3 Transmission/Transaxle

        1. Stock OEM Steel Fly-Wheel only.
        2. Flywheel must remain unaltered, no lightening permitted. Must be 18 lbs minimun =/- 1 lb for clean-up.
        3. A one (1) lb. tolerance from stock OEM specs will be allowed for flywheel resurfacing.
        4. Clutch disc and Pressure Plate must be stock OEM or exact replacement. No light weight clutch discs or pressure plates.
        5. A 1” hole must be drilled in bell housing over the clutch for inspection.
        6. Gears must be Stock. All forward & reverse gears must be working.
        7. Differential may be locked.
        8. Shangri-La II Tech reserves the right to disallow clutch setup accordingly. Questionable clutch assembly not meeting minimum criteria will not be allowed to compete.

        8.4 Drive Shaft

        1. Drive shafts and universals must be similar in design to standard production type. Only a 1 piece steel drive shaft permitted.
        2. It is mandatory that two (2) 360 degree solid steel brackets, no less than 1.5” (inches) wide and 1/4 inch thick, be placed around the drive shaft located 6.0” (inches) from the front and 6.0” (inches) from the rear and fasten to the cross member or chassis of the car.
        3. All drive shafts must be painted white.

         

         

         

        8.5 Rear Axle

        1. Stock OEM for make and model.
        2. Rear differential may be either “Open” or “Locked”.
        3. No Posi, Limited Slip or Ratchet Rears of any type allowed.
        4. No lightweight or aluminum parts allowed.

        8.6 Wheels

        1. Stock reinforced steel wheels or approved steel racing wheels with a minimum 18 lb. weight are allowed. 7” (inch) or 8” (inch) wheel width may be used.
        2. Must maintain 74 Inches from outside to outside of tire sidewall.
        3. All wheels must be the same diameter.
        4. No welding, modifications or repair of steel wills will be permitted.
        5. Wheel Spacers and/or shims are not permitted.
        6. Heavy duty wheel lug/studs are recommended, studs must pass completely through lug nuts.
        7. Bleeder or pop-off type valves are not permitted.

        8.7 Tires

        1. Competitors may run any racing or DOT treaded 7 inch bias ply, radial tire or the Hoosier 790 Racing tire.
        2. Durometer testing of tires will be conducted throughout the race event starting with the first practice. Any tire found to be softer than 60 points will be deemed illegal and penalties may be issued.

        8.8 Headers, Mufflers and Exhaust

        1. OEM stock, cast iron manifolds are permitted, no aftermarket headers permitted.
        2. Any steel header with 1 5/8” (inch) primary tube and 3” (inch) collector is allowed. No step headers, no 180 degree or stainless steel headers allowed.
        3. Spacers between head and headers will not be permitted. .
        4. Maximum pipe size 2.5” (inches). No 2-into-1 systems, No “X” or  “H” pipes.
        5. No thermal wrap will be permitted on headers, collectors or exit pipes.
        6. Mufflers are mandatory, no modifications of any type allowed to the muffler.
        7. Mufflers must be removable for inspection.
        8. Cars not adhering to this rule or excessively loud cars may not be allowed to compete.
        9. Exhaust must extend behind driver and exit under car out the rear of the car.
        10. Maximum allowable noise decibel to be 95db (decibels).

         

         

           

          Chassis Construction

          9.0 Wheelbase, Tread Width, Frame Height

          1. Maximum tread width front and rear is 74" (inches) measurements will be taken from outside of tires (sidewall to sidewall) at spindle height, no tolerance allowed.
          2. Absolute minimum height of frame will be 5” (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. Frame height measurements will be taken at the frame rail behind the front wheel and in front of the rear wheel.

          9.1 Chassis

          1. One 8” tall loop may be welded on top of bumper and one 4” tall loop may be welded under bumper in the front and rear of car. Loops may not be wider than frame rails.
          2. No shortening or altering of frame will be permitted.
          3. Fabricated or Aftermarket subframe connectors are allowed.
          4. Steel box tubing, Minimum 2” (inch) x 2” (inch) x .120” wall may be welded inside the car to the floor on each side along the rocker panels when installing the roll cage to use as a mounting point for the roll cages vertical bars.

          9.2 Front and Rear Sections

          1. Front Clip must remain stock for make, model and year of car.
          2. Fabrication of frame front & rear using 2” (inch) x 3” (inch) x .083” wall (minimum) tubing from strut tower in front forward and centerline of rear axle to the rear is allowed.

          9.4 Suspension Components

          1. Unless indicated otherwise in this rule book all suspension components must remain stock for make, model and year of car.
          2. All cross members must be in stock position, No slotting of holes or repositioning of cross members to alter the wheel base or change angle of control arms & trailing arms.
          3. All front control arms & rear trailing arm pivot points must be in stock position, stock length steel bushings allowed.
          4. No uni-balls or heim ends.

          9.5 Brakes

          1. Stock OEM hydraulically activated brakes in a good operating condition are required on all four wheels at all times.
          2. All rotors and brake components subject to Track Officials approval.

          9.6 Springs

          1. One spring allowed per wheel and must be stock in appearance.
          2. Racing springs are allowed provided they fit onto the stock strut or spring pocket.
          3. Adjustable spring cups are allowed.

          9.7 Shocks/Struts

          1. All struts must be OEM or exact replacement steel struts only. No adjustable struts or cartridges allowed.
          2. A maximum of 1 shock absorber per wheel is permitted.
          3. Aftermarket steel body shocks are allowed, no adjustable or external reservoir shocks allowed.
          4. Shocks must fit without any alterations or adapters and must remain in exact OEM mounting position.

          9.8 Sway Bars

          1. The front sway bar may be changed but must be standard factory production type, standard size, in factory location. Sway bar link must be standard OEM type.
          2. Rear sway bar if present must remain stock or may be removed.

          9.9 A-Frames

          1. Independent front suspension is mandatory with articulating upper and lower control arms.
          2. Upper and Lower Control Arms must remain stock for Make, Model and year of car.
          3. All suspension components must be in original position. No offset bushings.
          4. Stock rubber bushings may be replaced with aftermarket urethane or metal bushings.
          5. Ball joint must be of stock type, non-adjustable and maintain stock dimensions.

          9.10 Rear Trailing Arms

          1. No uniballs or heim joints ends.
          2. All trailing arms must remain stock for Make, Model and year of car.
          3. All trailing arm components must be in original position. No offset bushings.
          4. Stock rubber bushings may be replaced with aftermarket urethane or metal bushings.
          5. No adjustable bushings.
          6. All suspension mounting points must be unaltered.

          9.11 Steering & Spindles

          1. Steering Box and Steering arms must remain stock for make, model and year of car.
          2. Steering Column must remain in stock position.
          3. Stock OEM steering for, model and year of car.
          4. Collapsible Steering Column or Steering Shaft is required.
          5. If a fabricated steering shaft is used it must contain a collapsible section and 3/4” (inch) solid steering shaft or .120” (inch) wall tubing is recommended for the remainder.
          6. No Tilt Wheel steering columns allowed.
          7. Quick release steering wheel hub, made of steel, may be used. Hub must be welded to the steering shaft. The hub cannot be covered with plastic.
          8. If using Stock Steering Column and Wheel Airbag must be removed.
          9. Aftermarket steel or aluminum racing steering wheel may be used.
          10. Top of steering shaft and center steering wheel must be padded with a minimum of 2” (inches) of resilient material.
          11. No Steering Quickners will be allowed.
          12. Spindles must remain stock for make, model and year of car.

           

             

            Driver Safety

            10.0 Drivers Suit, Gloves, etc. - SFI Specification 3.2 A/5

            1. Driver must, at all times while in car, wear an SFI 3.2 A/5 approved driving suit, racing gloves and racing shoes. Suits must cover legs, arms and body of driver. Suits, gloves and shoes must be of fire resistant material. Suit may be of a one piece or two piece designs.
            2. Driver suits must be in good condition and fit accordingly.
            3. It is s also highly recommended that fire retardant undergarments, socks and head sock be used.

            10.1 Helmets

            1. Full face helmets are required and must meet either SFI Specification 31.1 or Snell SA2005 standards.
            2. Open face helmets will not be permitted. Helmets must be worn at all times while operating the car.

            10.2 Driver Seat 

            1. Driver’s seat must be designed for auto racing and constructed of a minimum of 0.125 inch thick aluminum and adequately padded, full containment seats are recommended. NO FIBERGLASS SEATS PERMITTED.
            2. The seat must be securely attached to the main roll cage in at least four points and cannot protrude outside 4 point upright or top cage halo.
            3. Aircraft-quality hardware with bolts no less than 3/8” (inch) in diameter is required for attaching seat to seat substructure. Seat must be located with at least 6" (inches) and a preference of 8" (inches) clearance to the nearest longitudinal door bar.
            4. A padded right side headrest is required.

            10.3 Roll Bars/Roll Cage 

            1. A complete 6 point roll cage is mandatory and must be installed in a safe, professional manner; 1.5” (inch) .095 wall steel tubing (minimum) is required, 1.250” (inch) .090 wall steel tubing (minimum) will be allowed for existing cars. (Competitor must show that they were running at a track where this was the rule). Chrome-moly or mild steel tubing is required.
            2. It is recommended that all cars have an x-type member across and behind the driver.
            3. A minimum of two (3) horizontal bars, two (2) vertical bars are mandatory on left side (Driver’s side).
            4. A minimum of two (2) horizontal bars, two (2) vertical bars are mandatory on right side (Passenger side).
            5. Roll cage structure should be fully gusseted with minimum 1/8” (inch) thick gusset plate’s at all major tube intersections.
            6. A front loop is required to protect driver’s legs and feet. No sharp or pointed objects in driver’s area.
            7. A full length dashboard bar is required and must be part of the roll cage structure
            8. A vertical bar (“Petty Bar”) located in the middle of the front opening of the windshield and attaching to the “dash bar” on the bottom and halo on the top of the cage (minimum 1” (inch) outside diameter) is recommended.
            9. Steel box tubing, Minimum 2” (inch) x 2” (inch) x .120” wall may be welded inside the car to the floor on each side along the rocker panels when installing the roll cage to use as a mounting point for the roll cages vertical bars.
            10. The roof bar should be within 4” (inches) of the side window and/or the door openings as well as the windshield.
            11. It is Highly Recommended to have 13 gauge metal welded between the door bars or a 13 gauge plate welded between the door bars and the driver’s door to provide intrusion protection.
            12. All bars, including steering wheel and shaft, in drivers section must be padded.
            13. Resilient padding meeting SFI Specification 45.1 must be installed on any roll cage or frame member that can be reached by any extremity of the driver while the driver is normally seated with restraints fastened. All hard surfaces around the driver’s head must also be padded.
            14. An interior door pad covering the left side door bars is recommended.
            15. The use of Aluminum and/or other soft metals in any part of the structure is not permitted.
            16. All roll cage installations and workmanship must be acceptable to Shangri-La II Officials.


            10.4 Belts and Shoulder Harness 

            1. Shoulder harness meeting SFI Specification 16.1, type 1. Seat belts must be dated by the manufacturer and must not be used beyond 2 years after the manufactured date.
            2. Shoulder harness must be a minimum of a 5 (five) point, minimum 3” (inches) wide and must come from behind driver’s seat. It is recommended that the harness pass through a steel guide welded to the roll cage that will prevent the harness from sliding from side to side, Y-type shoulder belts are not recommended.
            3. Restraints must be secured to roll cage members and/or frame rails, not to floor. Restraints must have readable identification tag and maintained free of fraying or dry cracking and are subject to periodic approval inspection. No original equipment belts permitted.
            4. Illustrations of recommended methods for mounting the Shoulder Harness and Lap Belts are contained in the General Rules Document. Always follow the recommendations of your manufacturer when installing any safety item in your car.
            5. Both ends of the lap belt must be fastened to the roll bar cage with high quality bolts not less than 3/8” (inch) diameter as specified by the manufactures specifications.
            6. Where the belts pass through the seat edges, the belt must have a grommet installed, be rolled and/or padded to prevent cutting the belt.
            7. A center (crotch) belt must be securely mounted to the lower seat frame at the bottom and to the lap seat belt at the top.
            8. A lap belt no less than 3 inches wide is compulsory, all seat belts and shoulder harnesses must connect at the lap belt with a quick release buckle.


            10.5 Head and Neck Restraints

            The following SFI 38.1 approved head and neck restraints are highly recommended Hans; Hutchens II; R3 and Hybrid.

            Note: Shangri-La II Speedway Management reserves the right in the future to at any time mandate a Head and Neck Restraint of its choosing.

            10.6 Window Net

            1. A left side SFI 27.1/1 rated window net manufactured of 1” wide webbing 8” (inch) high x 20” (inch) wide is required in the drivers window, No mesh windows are allowed.
            2. The window net must be centered in the window area and securely fastened at the top with a minimum of a .1875” (3/16 inch) flat steel bar or .375” (3/8 inch) round stock and run the entire length of the window net between mounting points. The bottom must be securely fastened to a door roll cage horizontal bar as shown in the following example:
            3. The net must have a mechanical release welded to the front or “A” pillar end of the bar. Spring-loaded releases are not approved for competition.
            4. The net must be in the latched position at all times when the car is on the track. Right side cage nets are also recommended.

            10.7 Roll Bar and Door Padding -SFI Specifications 45.1

            1. Resilient padding meeting SFI Specification 45.1 must be installed on any roll cage or frame member that can be reached by any extremity of the driver while the driver is normally seated with restraints fastened. All hard surfaces around the driver’s head must also be padded.
            2. An interior door pad covering the left side door bars is recommended.
            3. It is highly recommended that high density foam padding be inserted between the outside of driver’s side door plate and body to help absorb energy in the event of a side impact.

            10.8 In Car Fire Control

            1. A minimum of a five-pound (5) on-board fully functional fire suppression system, with multiple discharge points is recommended, Cold Fire recommended for cockpit usage.
            2. All cars not employing a fire suppression system must have a minimum of a 2.5 lb (pound) fire extinguisher securely mounted within the drivers reach. Tape is not acceptable as the method of mounting.

            10.9 Fire Extinguisher in Pit Area

            1. Each Team is required to have a minimum of a five (5 lb) fire extinguisher in their assigned pit area, a ten (10) to fifteen (15) pound fire extinguisher is recommended.

            10.10 Mirrors

            1. Mirrors are not permitted.

            10.11 Car Jacking/Support

            1. Cars must be fully supported by jack stands whenever a person is beneath it.

            10.12 Suspension

            1. All cars must have a safely mounted suspension in both the front and rear of the car, as per the Shangri-La II Tech Officials.

            10.13 Car Safety Inspection

            1. ALL CARS WILL BE INSPECTED BEFORE GOING ONTO TRACK. ANY CAR DEEMED UNSAFE WILL NOT BE ALLOWED ON TRACK. DECISIONS OF TRACK OFFICIALS WILL BE FINAL.
             

            Communications

            11.0 Radios

            1. No two-way radios allowed.

            11.1 One-way Scanners

            1. All car drivers must have one (1) one-way radio/scanner programmed to receive the Shangri-La II race control frequency at all times. Failure to comply with Officials one-way commands will result in an on track penalty or immediate disqualification.

            11.2 Transponders

            1. Transponders required.