Street Stock Rules

2006 LMEI Street Stock Rules

1. SAFETY EQUIPMENT: SA 2000 helmet required and must be worn at all times car is on the track. Roll bar padding (Fire retardant recommended) required in driver compartment. SFI approved full fire suit, fire retardant neck brace, gloves, and fire retardant shoes are required. Head and neck restraints recommended. Arm restraints or driver-side ribbon net to be mounted so latch is at top front of window. Five point safety belts, sub belt, shoulder harness required. Belt and shoulder harness must be mounted securely to roll cage and are recommended to be no more than one year old. Kill switch required within easy reach of driver and must be clearly marked “OFF” and “ON”. Mandatory right side head restraint bolted onto seat.

2. FRAME: Any American made rear wheel drive passenger car, 1962 or newer, full frame car. Minimum 107.5-inch wheelbase for full frame, maximum one-inch difference from side to side. Rear of frame behind rear tires, from a point no further forward than one inch behind factory seam, may be replaced in stock location with two-inch by three-inch steel tubing with .095-inch wall thickness, same length as material removed. Factory seam must remain visible. Unibody cars may be installed on metric frames.

3. ROLL CAGE: Main cage must be a continuous hoop, minimum 1.75-inch O.D. tubing, with a wall thickness of at least .095-inch, low carbon or mild steel recommended. Four-post roll cage required, front down bars and rear hoop must be welded to OEM frame. Driver’s head must not protrude outside cage with helmet on. Rear hoop must have “X” brace, consisting of one full horizontal and on full diagonal bar, 1.25-inch O.D. and .083-inch wall thickness. Front down bars must be tied together; passenger side front down bars must be maximum 11 inches in from top of door. Must be minimum 40 inches between front and rear down bars at top of door panel.

Maximum 41 inches from top center of windshield to front edge of rear hoop; maximum 13 inches to front edge of top halo. Top halo must be minimum 30 inches across, outside to outside. Rear hoop may be maximum 12 inches in from bottom of opera window. Minimum one cross bar in top halo. May have maximum tow horizontal bars, (in addition to bar tying front frame horns together) for radiator protection; must be behind bumper, within confines of body, no wider than stock frame horns. Required rear kickers (down bars) and engine hoop must be minimum 1.25-inch tubing, with .083-inch wall thickness. Fuel cell protection required must be mounted frame rail to frame rail, no higher than fuel cell, inside trunk area with maximum 1.75-inch tubing. All bars must be inside body.

4. DOOR BARS: Minimum three door bars, on drivers side, at least 1.75-inch O.D. and .095-inch wall thickness, must be as parallel with ground as possible, and perpendicular to driver. Passenger side must have one diagonal and one horizontal 1.50 O.D. Must have four uprights tied from frame to top door bar on driver side. Steel doorplates, 18-gauge or .049-inch minimum thickness metal, must be securely welded to outside of door bars on driver’s side. Plate must cover area from top door bar to rocker panel and from rear down post to five inches in front of seat. Must be visible for inspection.

5. BODY: All bodies must be LMEI approved, and completely stock OEM in stock location. Sunroofs and T-Tops must be enclosed. Aftermarket plastic nosepieces allowed, Unaltered steel hood and trunk only, Except sealed off air scoops allowed Hood and trunk must be securely fastened and back of hood must be sealed off from driver compartment with metal. Hood must be separate from fenders. Front inner wheel wells may be removed; rear wheel wells may be removed to middle seam. No overlapping or shortening of body panels. All glass must be removed; all windows in body must remain open, except for b-pillar, maximum seven-inch metal sun visor allowed only across top of windshield opening. All doors must be securely fastened. Fenders and quarter panels may be trimmed for tire clearance, ONLY.

6. DRIVER COMPARTMENT: Minimum three windshield bars in front of driver. Aluminum high-back seat only, bolted to roll cage. Driver seat may be no further back than rear edge of B-pillar. Driver must be completely sealed off from track, driveline, engine and fuel cell. Dash not to extend more than 24 inches back from center of lower windshield opening. Dash must be flat, rear can be no higher than front, except from cowl in front of driver. Inside rear quarter panels, below window level, may be cut out. Doors may be gutted. No cutting out of firewalls, roof, floor, rocker panels, or trunk floor, except for roll cage clearance. All holes in firewalls and floor must be covered with metal. Rear firewall and speaker deck must be metal and be of stock design for that make and model. No mirrors. Rear may be aluminum from rear window to back of seat. See diagram on last page to see the enclosure size of the driver’s compartment.

7. FRONT SUSPENSION: All components and mounts must be steel unaltered, approved OEM. Steel bushings allowed, Bolt on spindle savers allowed. Cables allowed from bottom of spring around rear end housing holding spring in. Adjustable spring spacers are legal but they must be tack welded so that they are not adjustable only for convenience at the shop.

8. STEERING: All components must be steel unaltered, approved OEM, in stock location and match frame. Steel steering shafts and knuckles only. Quick disconnect steering wheel approved.

9. SHOCKS: Must be approved OEM style steel unaltered passenger car shocks in stock location. No adjustable racing shocks. After market shocks are legal, but they must mount in the stock location. Penalty for adjustable racing shocks will result in loss of points and disqualified from competition for the night.

10. SPRINGS: One steel spring per wheel only. Racing springs ALLOWED. Rear must be in stock location. Front must be stock replacement. No screw jacks, or adjustable spring cups front or rear.

11. REAR SUSPENSION: All components and mounts must be steel unaltered, approved OEM. Steel bushings allowed, No independent rear suspension. No adjustable spacers. Adjustable spring spacers are legal, but they must be tack welded so that they are not adjustable only for convenience at the shop.

12. REAR END: No floater rear ends. Steel axles only. Nine-inch Ford rear end allowed, but must be mounted like stock rear end (centered) for that make and model. No lightened ring gears. Must be welded spider gears, or mini spool. No torque dividing differentials. No posi-tractions, No Quick changes. Drum brakes on the rear only no disc brakes no exceptions. Pan hand bars are legal.

13. BUMPERS AND RUB RAILS: Must be approved OEM Bumpers in stock location, capped to fender, with no reinforcement. Maximum one inch wide by two-inch tall steel rub rails bolted flush to body from fender well to fender well and rear quarter panel. BUMPERS must be chained.

14. TIRES AND WHEELS: Stock (OE) 235/50, or anything smaller to a 205/70 or 75, 14-inch, or 15-inch passenger car tires only. Tires must be inside body. No racing, snow, or all-terrain tires. No softening, conditioning, sipping/grinding or grooving. May be a 7inch DOT approved or maximum eight-inch wide stamped steel wheels with standard bead bump - must weigh a minimum of 19 pounds. No mag wheels.

One inch steel lug nuts required. No bleeder valves. Bead lock wheel is allowed on the right rear only the bead lock wheel is only allowed to be in a 8 inch width and must have an IMCA approved wheel decal on the wheel. There is a reason behind the IMCA decal on the bead lock it is a safety concern of LMEI.

15. BRAKES: Must be unaltered, approved OEM, operative four wheel, disc (front) and drum (rear) brakes, and match vehicle. Master cylinder must be in stock location. No antilock brake systems. No aftermarket brake pedal assemblies, brake shut-off or bias adjuster. Brake lines must be visible. Hubs/rotors may be changed to different bolt pattern or larger studs.

16. EXHAUST: OEM approved cast iron exhaust manifolds only. No center dump type manifolds. Exhaust must extend past firewall and turn towards ground. Maximum 2-1/2 inch O.D. exhaust pipes. Must remain dual exhaust, no crossover or “Y” pipes. No exhaust sensors. Mufflers required.

17. FUEL SYSTEM: Mechanical push rod fuel pumps only. Must use OEM unaltered Quadra jet, or unaltered two barrel. 1.50” Maximum carburetor spacer allowed. One .125-inch (maximum) thickness gasket only. May remove carburetor choke, but no other alterations. Air cleaner top cannot direct air into carburetor. No top flow air cleaner housings, cold air boxes or air cleaner ductwork. Fuel cell or plastic boat tank must be in minimum 18-gauge steel container. Must be securely fastened in trunk above level of stock trunk floor, by minimum of two .125-inch thick, solid steel straps, two inches wide around entire cell.

Metal firewall must be between driver and fuel cell. All cell mounts must be steel, securely welded to frame/cage. No adjustable fuel cell mounts. Fuel cell vents, including cap vent, must have check valves. Fuel lines through driver compartment must run through metal pipe or metal conduit. No fuel filters in driver compartment. Limit of one fuel filter. No cool cans. One carburetor per engine only. Each fuel cell must have a roll over valve for a vent no filters for breathers for the fuel cell. No exceptions!! If you are running the blue racing fuel line it does not have to run through conduit, the blue line is the only exception to this rule!

18. FUEL: Regular unleaded or 10% ethanol blend gasoline only, no additives. Racing Fuel cannot be more than 110 octane maximum.

19. WEIGHT: Ballast is allowed, must be mounted with at least two ½ bolts. No titanium, magnesium or carbon fiber products, parts or components. No gun-drilled, tubular, hollow bolts or studs. Steel fasteners only.

20. BATTERY AND STARTER: One 12-volt passenger car battery only, must be in marine-type case securely mounted to frame or roll case in metal frame behind seat or in trunk area. OEM starter required and must bolt in stock location. Must have capability of starting without being pushed or pulled. Must leave initial staging area on demand, unaided, or go to rear of that race. Mini Starter allowed in stock location.

21. GAUGES AND ELECTRONICS: No transmitting or listening devices, timing retards controls, or digital gauges. No electronic monitoring computer devices capable of storing or transmitting information except tach. No ignition control boxes, OEM ignition only. All ignition rotors, caps, coils and modules must remain stock appearing. No electronic traction control devices

22. TRANSMISSION AND DRIVE SHAFT: a. Manual transmission must be approve OEM three or four speed, with minimum 10.5-inch steel single disc-type clutch and steel pressure plate assembly inside an explosion-proof steel bell housing - minimum 270 degrees around top of clutch and flywheel area. Steel flywheel only - 16 pound minimum b. Automatic transmission must be approved OEM, with original bell housing and minimum 10-inch diameter torque converter containing a minimum of three quarts of fluid Torque converter must have a minimum .125-inch plug. Must have approved scatter shield constructed of .125-inch by three-inch steel, 270 degrees around flex plate. Flex plate must be full, OEM appearing, unaltered. c. Steel drive shaft (minimum 2.5-inch diameter) and slip yokes only.

Drive shaft must be painted white. 360-degree drive shaft loop required and must be constructed of minimum .25-inch by two-inch solid steel, or one-inch tubing, mounted six inches back from front U-joint.

23. ENGINE LOCATION: Must be in stock location, using any OEM stock mounts, except GM and Ford Metric frames must have back of fuel pump in front of cross member, and cross member may not be altered or moved. Solid steel motor mounts are legal.

24. ENGINE SPECIFICATIONS: Maximum of 160lbs per cylinder. Absolutely NO EXCEPTIONS!!!! Max cubic inch of 361. No 400 blocks. Cast iron intake. Aluminum water pump and pulleys are legal. Stock HEI distributor no MSD ignition boxes. Stamped steel rockers no roller rockers. Screws in studs are legal. No aftermarket heads. Stock heads only! Oil pan may have two kick outs. One carburetor per engine, no porting, polishing or any work done to stock cylinder heads. Absolutely no roller cam shafts, no exceptions, they will be checked.

25. EIRI - (Except in rare instances) Decisions of officials are final and binding without exception. In some cases, track safety rules may take precedence over LMEI rules - any discrepancy between LMEI and track rules should be brought to the attention of LMEI. Any rule changes or clarifications during the course of the year will be published.