SMODA Modified Rules

 

1. ROLL CAGE: MINIMUM TUBING THICKNESS .095". MINIMUM OUTSIDE DIAMETER 1.5". MUST BE 4 POST DESIGN WITH REAR UPRIGHT LOOP SUPPORTED WITH TUBING RUNNING DOWN TO THE REAR OF CAR. TOP HOOP MUST HAVE ONE CROSSBAR PREFERABLE RUNNING FROM RIGHT REAR TO LEFT FRONT. ABSOLUTELY NO CROSSBAR ABOVE DRIVER'S HEAD. ALL SUPPORT BARS FORWARD OF ROLL CAGE MUST BE LOWER THAN STOCK HOOD HEIGHT. DOOR BARS MUST BE .083. MINIMUM THICKNESS. THREE BARS MINIMUM. FOUR SUGGESTED. DOOR BARS MUST BE WELDED TO ROLL CAGE FRONT AND REAR AND BE PARALLEL TO FRAME.

 

2. SAFETY EQUIPMENT: A WORKING FIRE EXTINGUISHER, SECURELY MOUNTED WITHIN DRIVERS REACH AND A WINDOW NET ARE STRONGLY RECOMMENDED. ROLL CAGE PADDING RECOMMENDED.

 

3. BRAKES: MUST OPERATE AT ALL TIMES ON ALL 4 WHEELS. CALIPERS MUST BE OEM STEEL ONLY.

 

4. EXHAUST SYSTEM: HEADERS MAY DUMP OUT SIDE OF ENGINE OR REAR OF ENGINE AND MUST NOT POINT DIRECTLY TO THE GROUND.

5. FUEL CELL: 32 GALLON MAXIMUM CAPACITY. COMPLETELY ENCLOSED IN A STEEL ENCLOSURE. FUEL CELL MUST BE PROTECTED IN REAR BY ROLL CAGE TUBING. CELL MAY NOT BE LOWER THAN PROTECTIVE TUBING.

 

6. BATTERY: MUST BE MOUNTED SECURELY AND FASTENED ACROSS THE TOP.

 

7. FUEL: EITHER RACING GASOLINE OR METHANOL. NO NITROUS OXIDE OR POWER ADDITIVES.

 

8. WEIGHT: NO WEIGHTS ADDED IN DRIVER COMPARTMENT OR OUTSIDE OF BODY. WEIGHT MUST BE PAINTED WHITE AND HAVE CAR # ON IT. WEIGHT MUST BE FASTENED WITH 2-1/2" BOLTS MINIMUM. WEIGHT MAY NOT BE ATTACHED TO REAR BUMPER. ALL CARS MUST WEIGH 2400 LBS. WITH THE DRIVER AFTER THE RACE.

 

9. FRAMES: OEM PRODUCTION FULL 1960 OR NEWER PARALLEL AMERICAN PASSENGER CAR FRAMES ONLY. FRAME MAY BE CUT NOT FARTHER FORWARD THAN 36" FROM CENTER OF REAR END HOUSING. FRAME MUST BE FULL AND COMPLETE ON BOTH SIDES AND NOT NARROWED OR WIDENED. FRAME MUST BE ABLE TO SUPPORT ROLL CAGE.

 

10. FRONT SUSPENSION: MUST BE OEM (NO ALUMINUM) AND IN STOCK LOCATION. STOCK PASSENGER CAR SPINDLES ONLY. NO TUBULAR OR FABRICATED SPINDLES. BOTTOM A-FRAMES MAY NOT BE ALTERED OR MOVED. TUBULAR TYPE UPPER A-FRAMES PERMITTED AND CAN BE MOVED BUT NOT CUT OR ALTERED. BALL JOINTS MUST BE OEM TYPE. COIL SPRINGS MINIMUM 4-1/2" DIAMETER ONLY (NO COIL OVERS) AND MUST BE MOUNTED IN STOCK POSITION. COIL-OVER ELIMINATORS ARE NOT ALLOWED TO BE USED.

 

11. STEERING: MUST BE OEM TYPE. FRONT STEER TYPE FRAMES MUST HAVE STEERING BOX MOUNTED ON LEFT FRAME RAIL AHEAD OF FRONT CROSS MEMBER. REAR STEER FRAMES MUST HAVE STEERING BOX MOUNTED BEHIND CROSS MEMBER ON LEFT FRAME RAIL. POWER STEERING WITH A STEERING QUICKENER IS PERMITTED. NO RACK AND PINION STEERING. STOCK TYPE OEM STEERING BOXES ONLY.

 

12. SHOCKS: STEEL ONLY. ONE SHOCK PER WHEEL AND NO HYDRAULIC RATCHET OR ELECTRIC WEIGHT JACKS ANYWHERE ON CAR. NO EXTERNALLY ADJUSTABLE SHOCKS.

 

13. WHEEL BASE: MINIMUM 108" AND MAXIMUM 112"

 

14. REAR END: ANY PASSENGER CAR TYPE OR TRUCK REAR AND MAY BE USED. NO ALUMINUM ALLOWED EXCEPT LOWERING BLOCKS, AXLE CAP AND DRIVE PLATE. NO QUICK CHANGE DEVICE ALLOWED. REAR END MUST BE LOCKED AND MUST USE MINI-SPOOL OR WELDED SPIDERS ONLY. A ONE INCH (1") INSPECTION HOLE IN CENTER SECTION IS RECOMMENDED.

 

15. REAR SUSPENSION: MAY BE COIL SPRING (MINIMUM 4-1/2" DIAMETER) OR STEEL LEAF SPRINGS. COIL-OVER ELIMINATORS MAY BE USED WITH COIL SPRINGS. LOWERING BLOCKS (ALUMINUM OR STEEL) MAY BE USED WITH LEAF SPRINGS. NO ALUMINUM BIRDCAGES, BRAKE FLOATERS, TRAILING ARMS OR TRAILING ARM MOUNTS ALLOWED. PANHARD BAR AND BRACKET MUST BE STEEL.

 

16. DRIVESHAFT: MUST HAVE A PROTECTION LOOP COMPLETELY AROUND. LOOP MUST BE .25" THICK X 2" WIDE STEEL MINIMUM AND MOUNTED NO MORE THAN 6" BACK FROM U-JOINT IN DRIVESHAFT. DRIVESHAFT MUST BE STEEL AND PAINTED WHITE.

 

17. TRANSMISSION: MUST HAVE FORWARD AND REVERSE GEARS AND BE ABLE TO SHIFT TO FORWARD OR REVERSE WITH ENGINE RUNNING. BERT AND BRINN TYPE TRANSMISSIONS ARE PERMITTED (NO DIRECT DRIVES). STOCK CLUTCH TYPE TRANSMISSIONS MUST HAVE SCATTERSHIELD OR BLOW PROOF BELL HOUSING. AUTOMATICS MUST BE STOCK OEM CASES AND BELL HOUSINGS.

 

18. ENGINES: MUST BE ABLE TO BE USED IN CONVENTIONAL PASSENGER CAR WITHOUT ALTERATION. NO MACHINE WORK ON OUTSIDE OF ENGINE. NO DRY SUMP OIL SYSTEMS. RACING TYPE WET SUMP OIL PANS PERMITTED. ONE FOUR BARREL CARBURETOR NATURALLY ASPIRATED. NO FUEL INJECTION, NO ELECTRIC FUEL PUMPS, NO MAGNETOS. REAR OF ENGINE MUST BE AT LEAST 72" FORWARD FROM THE CENTER LINE OR REAR AXLE NO MORE THAN 2" ENGINE OFFSET. MINIMUM HEIGHT 11" FROM CENTER OF CRANK TO GROUND, NO ALUMINUM BLOCKS.

 

19. RADIATORS: MAY BE ALUMINUM OR STEEL AND MUST FIT UNDER HOOD LINE AND LOCATED IN FRONT OF ENGINE FAN.

 

20. BODIES: MUST RESEMBLE AMERICAN COMPACT PASSENGER CARS ONLY (DAYTONA, CAVALIER, PINTO, PROBE, MUSTANG II, T-BIRD, MONTE CARLO, GRAN PRIX, CUTLASS, ETC.). BODIES MUST HAVE FRONT AND REAR WINDOWS OPEN. STEEL SCREEN AND/OR BARS ARE MANDATORY IN FRONT OF DRIVER. ORIGINAL ROOF LINE SHOULD BE MAINTAINED WITH A MAXIMUM 1" DROP REAR TO FRONT. NO WINGS, OR OTHER GROUND EFFECTS ALLOWED INSIDE OR OUTSIDE OF CAR EXCEPT A 4" SPOILER. SEE ATTACHED DIAGRAM. BODY MUST HAVE A MINIMUM OF 4" GROUND CLEARANCE. ENGINE COMPARTMENT WILL REMAIN OPEN WITH NO SIDE PANELS. HOOD SIDES MAY HAVE A MAXIMUM 4" DROP AND BE ENCLOSED AT REAR OF HOOD. REAR OF BODIES ARE TO HAVE A SOLID PANEL AT LEAST 8" HIGH WITH CAR NUMBER. SIDE WINDOWS MUST HAVE A MINIMUM VERTICAL OPENING OF 12" FRONT TO BACK. NOSE PIECE NO LOWER OR WIDER THAN FRAME HORNS AND NO FURTHER BACK THAN RADIATOR. FRONT AND REAR ROOF EDGES MUST REMAIN FLAT. NO BENDING FOR SPOILER EFFECT. SIDE PANELS FROM ROOF TO REAR DECK CAN HAVE A MAXIMUM ONE INCH FLANGE FOR ADDED STRENGTH. DRIVERS SIDE WINDOW AND PASSENGER SIDE WINDOW MUST REMAIN OPEN EXCEPT FOR SUPPORT ANGLES IN ROOF PILLAR OPENINGS. SUPPORT ANGLES CANNOT EXCEED PAST THE FRONT ROOF LINE. ROOF PILLARS MUST BE IN PLACE. SEE ATTACHED DIAGRAMS FOR ALL MEASUREMENTS. FIREWALLS AND FLOOR BOARDS ARE MANDATORY. HANDMADE BODY PARTS MAY BE CONSTRUCTED OF STEEL, ALUMINUM, OR FIBERGLASS.

 

21. SEAT AND BELTS: MUST BE ALUMINUM RACING SEAT WITH 5 POINT SAFETY HARNESS. SEAT BELTS MUST BE RACING TYPE ONLY AND MANUFACTURED BY A RACING SAFETY COMPANY. BELTS MUST BE MOUNTED ACCORDING TO MANUFACTURERS' INSTRUCTIONS. BELTS OVER 2 YEARS OLD SHOULD BE REPLACED. DAMAGED BELTS MUST BE REPLACED.

 

22. KILL SWITCH: A BATTERY DISCONNECT SWITCH IS REQUIRED. THIS SHOULD BE MOUNTED WITHIN EASY REACH OF THE DRIVER AND THE SAFETY CREW.

 

23. FRONT BUMPER: MUST BE MOUNTED OT END OF FRAME, WITH BOTTOM LOOP PARALLEL TO THE GROUND. MINIMUM 1-1/2" TUBING MUST BE USED. REAR BUMPER MAY BE TUBING OR SQUARE STOCK AND MUST PROTECT FUEL CELL. CENTER OF BUMPERS MUST BE AT LEAST 18" FROM GROUND. NO SHARP EDGES.

 

24. NERF BARS: MUST BE INSIDE OF LINE FROM REAR TIRE TO FRONT TIRE WITH NO SHARP EDGES. THERE IS NO TOLERANCE.

 

25. GAUGES: OIL PRESSURE, OIL TEMP., WATER TEMP., FUEL PRESSURE, BRAKE BIAS PRESSURE, VOLT OR AMP GAUGE AND A TACHOMETER ARE THE GAUGES PERMITTED. NO DIGITAL DASH PANEL. NO LAP TIMERS OR ANY OTHER TYPE OF ELECTRONIC GADGETS PERMITTED. NO ELECTRONIC TRACTION CONTROL. NO ADJUSTABLE ENGINE TIMING CONTROLS OF ANY KIND. NO ENGINE RETARDING DEVICES ALLOWED. NO CONTROLLING OF WHEEL SPIN BY ANY DEVICE. NO BACK UP OR DUAL IGNITION ALLOWED.

 

26. STEERING WHEEL: ALL CARS MUST BE EQUIPPED WITH A REMOVABLE STEERING WHEEL.

 

27. WHEELS: ANY 8" STEEL PRODUCTION RACING WHEEL MAY BE USED. A BEADLOCK WHEEL MAY BE USED ONLY ON THE RIGHT REAR.

 

28. TIRES: HOOSIER RC4 OR A-20 AND McCREARY HARD AND MEDIUM 82/08 OR 84/08. NO SOFTENING, CONDITIONING, SIPING OR GROOVING OF TIRES ALLOWED. NO RE-CAPS ALLOWED.

 

29. MISCELLANEOUS: NO RADIOS (TRANSMITTING OR LISTENING DEVICES) OR MIRRORS PERMITTED. MIRRORED FINISHED STAINLESS OR OTHER MATERIALS ARE NOT PERMITTED, IF USED FOR THE SAME PURPOSE AS ACTING LIKE A MIRROR.

 

30. ALL THE PRECEDING RULES ARE SUBJECT TO CHANGE. THE OFFICIALS RESERVE THE RIGHT TO MAKE ANY DECISIONS AND JUDGE ACCORDINGLY, WITH THE INTEREST OF SAFETY, WITHOUT RECOURSE. ANYTHING NOT COVERED IN THESE RULES ARE UP TO THE DISCRETION OF TRACK OFFICIAL.