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3850 lb SMALL BLOCK 4x4
3850 LB. SMALL BLOCK 4 X 4 TRUCK
1. BODY/CHASSIS
A. MAXIMUM WHEELBASE OF 135".
B. VEHICLES MUST HAVE CLOSED DOORS, UNLESS EQUIPPED FROM FACTORY WITH FABRIC TOP.
C. HALF CABS MUST HAVE CLOSED DOORS.
D. VEHICLE MUST HAVE STOCK APPEARING HOOD AND FRONT FENDERS.
E. BEDS AND REAR FENDERS ARE REQUIRED.
F. ENGINE COMPARTMENT MUST BE CLOSE TO FACTORY SPECIFICATIONS OR ENGINE SIDE SHIELDS
ARE REQUIRED.
G. NO WEIGHTS CAN EXTEND FORWARD MORE THAN 60" FROM CENTER OF FRONT AXLE. ALL WEIGHT
FRAMES AND WEIGHTS MUST BE STATIONARY AND SAFELY SECURED TO THE VEHICLE
H. HOOD SCOOPS ALLOWED.
I. FUEL TANK MUST BE LOCATED OUTSIDE OF CAB.
J. WORKING FRONT BRAKES ARE MANDATORY.
K. TIRE STAGGER - NO MORE THAN 1/2 WIDTH OF TIRE - FRONT TO REAR.
2. TRANSMISSION AND DRIVE LINES
A CLUTCH/MANUAL TRANSMISSIONS MUST HAVE A SEMA APPROVED BELLHOUSING.
B. ALL UNIVERSAL JOINTS COVERED WITH 6" WIDE, 5/16" STEEL OR 3/8" ALUMINUM
C. ALL DRIVE SHAFTS MUST HAVE A MIDPOINT SAFETY LOOP.
D. TORQUE CONVERTERS AND AUTOMATIC TRANSMISSIONS MUST BE EQUIPPED WITH AN SFI
APPROVED SAFETY SHIELD OR BLANKET. AUTOMATIC TRANSMISSIONS MUST HAVE A POSITIVE
REVERSE GEAR LOCKOUT.
3. ENGINE
A. ONE FOUR BARREL CARBURETOR, - NATURALLY ASPIRATED.
B. NO FUEL INJECTION, BLOWERS, TURBO CHARGERS, OR NITROUS OXIDE ALLOWED.
C. SMALL BLOCK ENGINE -410 CUBIC INCH LIMIT. ONE YEAR PHASE IN FROM 430 C.I. - 410 CI MAXIMUM
FOR 2001 PULLING YEAR.
D. PULLING VEHICLES MUST BE EQUIPPED WITH A DEADMAN THROTTLE. THROTTLES WORKING IN A
FORWARD-BACKWARD DIRECTION SHALL BE CLOSED IN THE REAR MOST POSITION. NO HYDRAULIC
THROTTLE LINKAGE ALLOWED. LINKAGE MUST BE POSITIVE TWO WAY MECHANICAL LINKAGE.
E. A BOLT IN THE CRANKSHAFT IS REQUIRED TO HOLD THE DAMPENER PULLEY. PULLEY TO BE SHIELDED
360 DEGREES - SFI DAMPERS EXEMPTED FROM SHIELDING.
F. ENGINE FANS MUST BE COMPLETELY SHROUDED WITH STEEL 1/16" OR THICKER - ELECTRIC FANS
EXCLUDED.
G. THE FORMULA FOR CALCULATING THE CU. IN. DISPLACEMENT OF ANY PISTON ENGINE IS:
BORE X BORE X STROKE X .7854 X NUMBER OF CYLINDERS
H. ALL EXHAUST SYSTEMS MUST DISCHARGE VERTICALLY - VERTICALLY IS DEFINED AS BEING WITHIN
10 DEGREES (ANY DIRECTION) OF “BEING PLUMB”.
I. HEIGHT SHALL BE A MINIMUM OF 12'’ ABOVE THE BEND IN THE PIPE WHICH DISCHARGES VERTICALLY,
MEASURED FROM THE TOP OF THE PIPE TO THE BOTTOM OF THE BEND.
J. EXHAUST PIPES MUST BE SECURELY ATTACHED.
K. RAIN CAPS AND MEGAPHONE PIPES NOT PERMITTED.
L. VENTURI-TYPE HEADERS ACCEPTABLE.
4. KILL SWITCH
A. FOR SPARK IGNITION ENGINES THE KILL SWITCH MUST BREAK OR GROUND THE IGNITION
CIRCUIT AND MUST BREAK ELECTRIC POWER TO AN ELECTRIC FUEL PUMP(S) IF SO EQUIPPED.
B. KILL SWITCH MUST HAVE A MINIMUM 2" DIAMETER SOLID RING, WITH MINIMUM 1/8" CROSS
SECTION THICKNESS, ATTACHED TO IT. THE CABLE FROM THE SLED MUST BE ABLE TO BE ATTACHED
TO THIS RING.
C. KILL SWITCH MUST BE MOUNTED INDEPENDENTLY OF DRAWBAR AND/OR WHEELIE BARS.
D. LOCATION OF KILL SWITCH: IN REAR CENTER OF VEHICLE, 24" ABOVE AND WITHIN 6" OFF CENTER
OF POINT OF HOOK.
5. HITCH
A. HITCH MUST BE RIGID IN ALL DIRECTIONS, AND PARALLEL TO THE GROUND.
B. MINIMUM HITCH LENGTH IS 36% OF WHEELBASE OF THE TRUCK.
C. HITCH POINT TO BE A 3" ROUND HOLE, 1" THICK AT ANY POINT. HITCH MUST BE HORIZONTAL – NOT
VERTICAL.
D. HITCH HEIGHT TO BE 17" ABOVE THE GROUND.
6. TIRES
A. TIRE SIZE LIMIT OF 31" X 15.5" X 15".
B. BARRED TIRES ALLOWED.
7. SAFETY
A. DRIVER MUST WEAR SHIRT, SHOES, AND LONG PANTS.
B. HELMETS AND FIRE SUITS ARE HIGHLY RECOMMENDED, BUT NOT REQUIRED.
NOTE: ALL PULLERS MUST BE REGISTERED 30 MINUTES BEFORE PULL STARTS
Send E-Mail to: 4x4nut@kinex.net
Copyright © 2003 Virginia Truck Pullers Association. All Rights Reserved