Shelby County Speedway

CRATE LATE MODEL RULES:

GMPART NUMBER 88958602 &

GM PART NUMBER 88958604

THESE ENGINES ARE SEALED AT THE INTAKE MANIFOLD, CYLINDER HEAD, FRONT COVER AND OIL PAN WITH SPECIAL TWIST OFF BOLT HEADS ORIGINALLY FROM GM. CRATE USA SEALS ALLOWED. NO RM BOLTS FOR ANY OTHER SEALING SYSTEM CONTACT CRATE  RACIN' USA FOR APPROVAL. CRATE ENGINES MUST NOT BE ALTERED, MODIFIED OR CHANGED FROM FACTORY SPECS.

THE SEALED ENGINES MUST REMAIN INTACT AND NOT BE TAMPERED WITH. ANY SEALS THAT HAVE BEEN REMOVED OR TAMPERED WITH, WILL MAKE THE ENGINE ILLEGAL AND NOT ELIGIBLE FOR COMPETITION. THE PENALTY FOR ANYONE TAMPERING WITH SEALS, MODIFYING ANY INTERNAL ENGINE PARTS, CHANGING THE PARTS FROM STOCK AS DELIVERED SEALED FROM THE FACTORY WILL BE SUBJECT TO EXPULSION FROM RACING WITH ANY CRATE RACIN' USA SANCTIONED EVENT FOR THE REMAINDER OF SEASON AND FUTURE SEASONS.

NO CHANGES ARE ALLOWED TO THE ENGINE-INTAKE MANIFOLD, HEADS, VALVE COVERS, FRONT COVER, OIL PAN, HARMONIC BALANCER OR ANY OTHER PART/ OR PARTS ON/ OR IN ENGINE

BEGINNING IN JANUARY 2010 COMPETITORS MAY RUN A MAXIMUM OF A .020" SHIM UNDER VALVE SPRINGS ON REPAIRED OR REBUILT ENGINES, OR ON NEW ENGINES, THAT INCONSISTENCIES ARE FOUND WITH "INSTALL HEIGHT" OR "FREE HEIGHT" OF REPLACEMENT VALVE SPRINGS, AND MUST REMAIN WITHIN THE GM SPECIFICATIONS FOR INSTALL HEIGHT

(604-1.780", AND VALVE SPRING SEAT PRESSURE, 604 105 LB MAXIMUM. CRATE RACIN' USA VALVE SPRING TESTER IS THE OFFICIAL TESTER, AND ALL FINAL RULINGS WILL BE BASED ON THIS TESTER ONLY.

WARNING - IT IS THE RACERS RESPONSIBILITY TO ENSURE EACH INDIVIDUAL VALVE SPRING HAS THE CORRECT  "INSTALL HEIGHT" AND MEETS THE MAXIMUM VALVE SPRING PRESSURE RULE, AS PER THE GM SPECIFICATION MANUAL.

NO VACUUM PUMPS

ALL CRATE ENGINES MUST REMAIN STOCK AS THEY CAME SEALED FROM THE FACTORY. CRATE ENGINES MUST NOT BE ALTERED, MODIFIED OR CHANGED FROM FACTORY SPECS. ENGINE'S GM SERIAL NUMBER AND WHEN APPLICABLE CRATE USA BUILD CERTIFICATION NUMBER, MUST BE CLEARLY VISIBLE TO SERIES TECHNICAL INSPECTORS.  ANY VIOLATION OF THE ENGINE RULES AND OR FACTORY SPECS INSIDE THE SEALING SYSTEM OF THE ENGINE WILL RESULT IN THE DRIVER AND OR OWNER BEING DISQUALIFIED FROM THAT EVENT AND SUSPENDED FROM SERIES COMPETITION FOR 365 DAYS AND PAY A $1000 FINE. AFTER THAT PERIOD, THE DRIVER CAN ONLY COMPETE IN SERIES EVENTS WITH AN ENGINE EQUIPPED WITH ORIGINAL FACTORY GM SEALING BOLTS, OR CRATE RACIN' USA SEALES FROM AN AUTHORIZED REBUILDER APPROVED AND AUTHORIZED BY CRATE RACIN' USA.

OFFICIALS, DRIVER AND OR OWNER WILL BE NOTIFIED IN WRITING OF SERIES DECISION. ALL DECISIONS ARE FINAL.

ANY VIOLATION OF THE ENGINE RULES AND OR FACTORY SPECS OUTSIDE THE SEALING BOLTS OF THE ENGINE WILL RESULT IN THE DRIVER BEING DISQUALIFIED FROM THAT EVENT. DRIVER AND OR OWNER COULD BE SUSPENDED FROM SERIES COMPETITION FOR UP TO, BUT NOT MORE, THAN 30 DAYS.

ENGINE SETBACK RULE:

ENGINE SETBACK WILL BE 6" FROM CENTER OF TOP BALL JOINT TO THE #1 SPARK PLUG WITH A 1-INCH TOLERANCE ON ENGINE SETBACK. THERE WILL BE A

50 LB PENALTY FORWARD OF THE MOTOR PLATE FOR EACH 1/2 INCH OF SET BACK BEYOND SEVEN (7) INCHES OF ENGINE SETBACK. NO CARS WITH MORE THAN AN EIGHT (8) INCH ENGINE SETBACK WILL BE ALLOWED TO COMPETE.

CARBURETOR RULES:

ONE FOUR-BARREL CARBURETOR ONLY OF ANY MANUFACTURE. ENGINE MUST BE NATURALLTY ASPIRATED. 604 - MAY USE ONE CARBURETOR SPACER ( 1 INCH-ONE PIECE WITH .040 TOLERANCE MAXIMUM) AND TWO STANDARD PAPER GASKETS (MAXIMUM 0.070 INCH THICK), ONE GASKET BETWEEN INTAKE TO SPACER AND ONE GASKET BETWEEN SPACER TO CARBURETOR.

DISTRIBUTOR RULE:           

ANY ELECTRONIC DISTRIBUTOR-TYPE IGNITION SYSTEM. NO CRANK TRIGGER, DISTRIBUTOR LESS MULTI-COIL OR MAGNET TO IGNITION SYSTEM.

STARTER RULE:     

ALL CARS MUST HAVE STARTER IN WORKING ORDER

WATER PUMP RULES:        

CAST OR ALUMINUM PERMITTED. NO ELECTRIC WATER PUMP

EXHAUST RULES:         

COLLECTOR TYPE HEADERS REQUIRED. MUST HAVE FOUR (4) TUBES INTO ONE (1) COLLECTOR OF A CONSISTENT DIAMETER. MUFFLERS NOT REQUIRED UNLESS TRACK MANDATES. NO TRI-Y HEADERS OR MERGED HEADERS ALLOWED. NO SQUARE-TUBE HEADERS ALLOWED.

FUEL - FUEL CELL -  FUEL PUMP RULES         

AN APPROVED FUEL CELL (32 GALLON MAXIMUM) MUST BE SECURELY MOUNTED IN THE TRUNK AREA OF THE CAR, INSIDE A .20 GAUGE METAL BOX SUPPORTED BY A MINIMUM OF TWO 2" BY 1/8" STEEL STRAPS. ALL FUEL CELLS MUST BE COMPLETELY VISIBLE FROM REAR OF CAR. GASOLINE OR RACING GAS ONLY - NO ETHANOL (E85, OR E105) NO METHANOL OR ALCOHOL - NO NITROUS OXIDE. NO PROPYLENE OXIDE, OR CHEMICAL ADDITIVES. FUELS MUST HAVE A SPECIFIC GRAVITY OF LESS THAN .745. ANY FUEL WITH A SPECIFIC GRAVITY OF .745 OR GREATER WILL BE DISQUALIFIED. IT IS THE RACERS RESPONSIBILITY TO KNOW WHAT HE OR SHE IS PUTTING IN THE FUEL CELL. THE NEW VP CHP RACING FUEL IS STRONGLY RECOMMENDED, AS IT IS SPECIALLY FORMULATED FOR THE GM PERFORMANCE CIRCLE TRACK.  

ENGINES FOR MAXIMUM FUEL PUMP ONLY, CAN DRIVEN OR BELT DRIVEN. NO ELECTRIC FUEL PUMPS.

BODY RULES:   

CRATE RACIN' USA BODY RULES WILL APPLY. NO RAISED OR GURNEY LIPS OF ANY TYPE ALLOWED ON BODY.

NO TUNNELLING OF ANY TYPE ALLOWED UNDERNEATH BODY, ALONG FRAME OR AROUND FUEL CELL AREA. A STONE SHIELD FOR REMOTE OIL FILTER OR TRANSMISSION IS ALLOWED, 24" X 24" MAXIMUM LOCATED NEAR REAR ENGINE PLATE. (SEE ILLUSTRATIONS AT THE END OF THESE RULES FOR FURTHER BODY SPECS). SPOILER SIZE MAXIMUM 12" SPOILERS MUST BE MADE OF A SOLID MATERIAL SUCH AS LEXAN OR SHEET ALUMINUM OR MATERIALS OF EQUAL STRENGTH. SPOILER AND SPOILER SUPPORTS SHOULD BE MADE OF EQUAL MATERIAL ON ALL AREAS. NO OPEN SPOILER SUPPORTS. SPOILER HEIGHT, WIDTH AND ANGLE MUST BE THE SAME AT ALL TIMES FOR THE ENTIRE AREA OF THE SPOILER. NO VARYING SPOILER HEIGHTS OR SPOILER ANGLES.  ROOF SUPPORTS OR "C" PILLARS ON BOTH SIDES MUST BE MADE OF EQUAL MATERIAL. WINDOW OPENINGS ARE ALLOWED BUT MUST BE THE SAME SIZE OPENING ON LEFT AND RIGHT SIDE. IF CLEAR LEXAN WINDOW IS USED IT MUST BE USED ON BOTH SIDES. BOTH SIDES OPEN OR BOTH SIDES CLOSED. THE AEROTECH DOMINATOR NOSE PIECE IS ALLOWED. NO MIRRORS. NO RADIOS.

FRAME RULES:  

ALL FRAMES MUST BE OF STEEL CONSTRUCTION. SQUARE OR RECTANGULAR FRAME MUST HAVE A MINIMUM OF 2" BY 2" MATERIAL, .083 WALL THICKNESSES. ROUND TUBE FRAME, TUBING MUST HAVE A MINIMUM OF 1-3/4" OUTSIDE DIAMETER, .083 WALL THICKNESSES.

WHEEL BASE RULE:               

MINIMUM WHEELBASE WILL BE 103"

 RACING IN 2012

$300 TO WIN WITH 3 OR MORE CARS

ROLL CAGE RULES:                          

ALL CARS MUST HAVE A SUITABLE STEEL ROLL CAGE PROTECTION THE DRIVER'S COMPARTMENT, INCLUDING HEADREST.  SIDE ROLL BARS ARE MANDATORY AND MUST EXTEND INTO THE DOOR PANELS, A MINIMUM OF THREE (3) HARS. MUST BE ON THE LEFT SIDE. EACH BAR MUST BE AT LEAST 1-1/2" DIAMETER, WITH A MINIMUM MATERIAL THICKNESS OF .083". ROLL CAGE MUST BE WELDED TO FRAME

TRANSMISSION RULES:                 

MUST HAVE AT LEAST ONE FORWARD AND ONE REVERSE GEAR IN WORKING ORDER. NO STRAIGHT DRIVES OR IN AND OUT BOXES. DRIVE SHAFTS MUST BE PAINTED WHITE.  CARBON FIBER DRIVE SHAFTS ARE LEGAL. BALLSPLINE TRANSMISSIONS STRONGLY RECOMMENDED TO RUN CARBON FIBER DRIVE SHAFT ONLY. THIS IS FOR YOUR SAFETY.

BRAKE RULES:                    

STEEL BRAKE ROTORS ONLY. NO CARBON FIBER BRAKES. TITANIUM BRAKES OR OTHER EXOTIC MATERIAL BRAKE SYSTEMS.

WHEEL RULES:                     

ANY BRAND OR TYPE OF WHEEL ALLOWED MUST BE MOUNTED WITH LUG NUTS. NO KNOCK-OFF OR CENTER LOCK WHEELS. MAXIMUM WHEEL WIDTH - 14"

TIRE RULE:                  

HOOSIER D21 AND D55 STAMPED CRATE RACIN' USA AND SHOULDER PALTED. TIRES WILL BE DUROMETERED AND CRATE RACIN' USA D21 MUST PUNCH 48 OR HARDER AND CRATE RACIN' USA D55 MUST PUNCH 60 OR HARDER AT ANY TIME WHEN TESTED. GROOVING AND SIPING ALLOWED.

WEIGHT RULE:                  

GM CRATE ENGINE #88958602 - 2200 LBS. AT QUALIFYING, 1 LB PER LAP BURNOFF ON HEATS, CONSYS AND

FEATURE RACE. GREEN FLAG LAPS ONLY. ATTACHED WEIGHT MUST BE SECURELY BOLTED TO FRAME WITH 1/2" OR LARGER BOLTS. WEIGHT MUST BE PAINTED WHITE WITH CAR NUMBER DISPLAYED. PENALTY FOR LOSING ATTACHED WEIGHT ON THE RACE TRACK.

2012 LIMITED LATE MODEL DIVISION RULES:

ALL CARS MUST HAVE 8 INCH SPOILER

 ENGINE:            

A. 362 CUBIC INCH MAX, INCLUDING OVER BORE.

B. ANY STEEL CRANKSHAFT

C. STOCK STROKE

D. ANY STEEL CONNECTING RODS E. STOCK TYPE PISTONS, 2 OR 4 EYEBROW, MAY BE FORGED

F. DRY SUMPS ALLOWED

ENGINE SETBACK:                     

A. FULL TUBULAR FRAMES - SIX (6) INCHES WITH 1/2" TOLERANCE

HEADS:              

A. STEEL HEADS. MUST BE BASED ON OEM DESIGN (CHEVY, WORLD, DART AND PRO ARE OKAY).

B. 23 DEGREE HEADS ARE OKAY.

NO 14 DEGREE HEADS ALLOWED.

C. INTAKE AND EXHAUST BOLT PATTERN MUST MATCH ORIGINAL OEM HEAD.

D. VALVE ANGLE AND VALVE SPACING MUST MEET OEM SPECS FOR THE HEAD BEING USED.

E. STEEL VALVES ONLY. UNDERCUT STEMS PERMITTED. NO TITANIUM VALVES.

F. VALVE STEM DIAMETER 11/32 INCH MINIMUM FOR ALL ENGINES.

G. MAXIMUM VALVE SIZE:

INTAKE - 20055, EXHAUST - 1.625.

H. NO PORTING OR POLISHING

I. THREE (3) ANGLE RACING VALVE JOB PERMITTED. MACHINE CUTS ONLY.

J. ANY VALVE SPRINGS, RETAINERS, ROLLER ROCKER ARES AND STUD GIRDLES ALLOWED.

WEIGHT:                  

STEEL ANGLE PLUG HEADS -

2400 POUNDS

IT IS THE DRIVER'S RESPONSIBILITY TO HAVE DECLARED WEIGHT DISPLAYED ON LEFT SIDE OF ROOF. ANY CAR WITH WEIGHT NOT DISPLAYED IS SUBJECT TO DISQUALIFICATION.

CAMSHAFT:                       

FLAT TAPPET ONLY. NO ROLLER CAMS.

DISTRIBUTOR:                    

STOCK TYPE OR MAGNETO ALLOWED

CARBURETOR:                        

750 CFM MAXIMUM. ANY INTAKE MANIFOLD. GASOLINE ONLY.

CLUTCH/TRANSMISSION:                   

A. TRANSMISSIONS MUST HAVE WORKING FORWARD AND REVERSE GEARS

B. ANY TRIPLE DISK CLUTCH IS ALLOWED.

C. TRANSMISSION MUST BE IN OEM HOUSING.

D. AFTERMARKET  BERT OR BRINN TRANSMISSIONS ARE ALLOWED

E. ALUMINUM FLYWHEELS ARE ALLOWED.

1. ANY TYPE REAR END GEAR IS ALLOWED.

2. SHOCKS - RACING TYPE AND COIL-OVERS ARE ALLOWED.

3. FUEL CELL IS MANDATORY

4. WHEELBASE - MINIMUM OF 103 INCHES, MEASURED FROM CENTER OF HUB TO CENTER OF HUB.

BRAKES - MUST HAVE 4-WHEEL BRAKES

RACING DISK BRAKES ARE ALLOWED.

TIRES: HOOSIER D55 SPEC OR HOOSIER D21 STAMPED CRATE RACIN' USA.

WHEELS - 14 INCH MAX WIDTH.

ALUMINUM WHEELS ALLWOED.

 BEADLOCK ARE OKAY.

NO CARBON FIBER WHEELS.

HEADERS:

NO TRUNED DOWN TUBES.

EXHAUST MUST RUN PARALLEL WITH THE GROUND.

BODY:

SAME AS SUPER LATE MODELS - WWW.SOUTHERN-ALLSTARS.COM

SPOILER:

EIGHT (8) INCH MATERIAL