#7 CORR PRO-4

Vehicle: 2007 Ford F-150

Engine Size:  V-8 - Pro Power Performance

Lubricants: AMSOIL

Transmission: J & H Performance built - 3-speed Automatic

Transfer Case: BorgWarner

Differential: Alloy USA  - 9" Ford

Tires: KUMHO Road Venture MT KL71

Wheels: Walker Evans Racing

Seat: Mastercraft

Lighting: KC HiLities

What is CORR PRO-4?

Vehicles built or manufactured as a full size four (4) wheel driven type utility vehicle, capable of being driven through the front
wheels. Vehicle must be a standard manufacturer production model available to the general public in the U.S.A. Vehicle style must
have a manufacturer production of five thousand (5,000). Manufacturer body styles, engines and chassis must all be from the same
Pro 4 is considered an open production division regulated only by Division, ACCR and Safety Rules. Division rules supersede
ACCR.
 

SUSPENSION
A. Spindles may be reinforced or manufactured and must retain the same basic design and concept as originally mounted as
produced.
B. No limits or restrictions on: Ball joints, spring rate capacities or pivot point bushings.
C. Front wheel maximum wheel travel limits: Eighteen (18) inches.
D. Rear wheel maximum wheel travel limits: Twenty (20) inches.
E. All 4 corners must be coil over suspension.
 

CHASSIS
A. Maximum wheelbase: One Hundred-Twenty Two (122) inches. Minimum Wheelbase: One Hundred Thirteen (113)
inches.
B. Maximum track width: Ninety Three (93) inches, outside of tire to outside of tire, as measured from ride height of ten
(10) inches. Measured as vehicle passes over ride height blocks.
C. Trucks wheelbase and tracking width will be measured with all tires inflated to twenty- (20) psi in outer tire. Truck will
be measured as they pass over a ten (10) inch ride height block.
 

RIDE HEIGHT OF TRUCK
A. Ten (10) inches measured as vehicle drives over ten (10) inch ride height blocks.
B. Truck may be measured before and after competition.
C. Trucks will be measured will all tires inflated to twenty (20) psi pressure in outer tire.
D. Trucks may be measured for proper ride height before and after competition.
 

TRUCK BODY
A. All fender and box side mounts must be a looped design only. Box sides must be full length including the taillight
wrap around.
B. Maximum body width: Eighty (80) inches as measured between pillar A and pillar B.
 

FENDERS
A. Fenders may be flared to outside of the tire.
 

TRUCK WEIGHT
A. Vehicle weight is set according to the following formula:
2 valves per cylinder and using a carburetor must weigh 10lbs./ cu. in.
2 valves per cylinder and using CORR approved fuel injection must weigh 10.5lbs./ cu. in.
3 or more valves per cylinder and using a carburetor must weigh 11.5lbs./ cu. in.
3 or more valves per cylinder and using CORR approved fuel injection must weigh 11.75lbs./ cu. in.
B. For those trucks using electronic fuel injection, please refer to ACCR-18 page 24.
C. Trucks may be weighed pre and post race, and must weigh a minimum of 4,000 lbs. with driver at race end.
D. Weight is subject to change in interest of competition.
E. Minimum front axle weight: 48% of total truck weight at race end.
F. All trucks must meet minimum weight and front percentage both pre and post race.
CORR 2006 Rulebook Page 36
 

ENGINE BLOCK
A. OEM design, steel or aluminum.
B. Block must be available to the general public and had been made in quantities of at least 1000.
C. Maximum of eight (8) cylinders.
 

CARBURETOR
A. One four-barrel carburetor permitted.
B. No turbo or super chargers or Nitrous oxide.
 

FUEL INJECTION
A. For those trucks using electronic fuel injection, please refer to ACCR-18 page 24.
 

DRIVE PARTS
A. Engine to transmission adapter plate can be a maximum of one-half (½) inch thick.
B. Auxiliary under drive and overdrive units are permitted.
C. Motor crankshaft must be connected to transmission input shaft via a conventional clutch assembly or vane type torque
converter.
D. Must be in stock order, engine, transmission, transfer case, differential via a drive shaft, engine must be in front of truck.
E. Rear differential must be spool type only, an approved by CORR Technical Director.
F. Rear differential must have a minimum of one (1) one and a half (1½) inch inspection bung or plate placed in such a
manner that CORR Tech can see and identify spool. If inspection area does not exist, crew chief will remove differential
for CORR Tech inspection.
G. Independent rear suspension not allowed.
 

TRANSMISSION
A. Automatic transmissions must operate through a conventional torque converter.
B. Manual shifting of all transmissions is mandatory, unless other method need be employed for handicap condition of
driver. CORR technical director must approve all non-manual shifting procedures.
C. Auxiliary under drive or over drive units may be shifted electronically, but only by manually operated switch.
 

TIRES
M. Maximum tire size of 35 x 12.50 or metric equivalent.
N. D.O.T. or “Project” tires allowed
O. Inner liners allowed.
P. Minimum air pressure on starting line must be 15 PSI.
Q. Equipment used to adjust air pressure during race not allowed.
R. Maximum tread width is 10.2”, section width is 13.2”, diameter is 35.0”. These measurements are taken on a 10 inch wheel at 35 PSI without load.
 

WHEELS
A. Maximum wheel size is 10”x 15”, 10”x 16” or 9”x17”
B. Minimum backspacing for all wheels will be 3 ¾”.
C. All wheels must be in excellent condition free from cracks and defects that could cause wheel failure.
D. For 2006 all bead lock rings must have recessed bolts only
 

RADIOS
All pro trucks must be equipped with a two-radio and a spotter. ACCR-22 applies.
ALL ACCR RULES APPLY AS SO STATED IN THIS CORR RULEBOOK.