The rules promulgated in these rules are intended as guidelines for the sport of ‘Run What Ya Brung’ 4x4 truck pulling. These rules have been adopted by the Allegheny Highland Pulling Association Inc. for the 2007 season. Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators. Each participant at a Allegheny Highland Pulling Association Inc. pulling event must assure that their equipment and replacements throughout the season meet the requirements for this class.
General Rules:
A.H.P.A. officials reserve the right to alter these rules before or during
the season in order to deal with safety related issues or to insure the
competitive nature of the class.
This is an open truck class available to owners of trucks that
may or may not be licensed for the highway. Trucks do not have to be
registered in order to compete in this class. Trucks may be hauled to the
pulling site. Trucks that bump up from any other class will be required to have
full safety equipment. Those trucks that bump up will not be eligible to
participate in any other class held that day.
Weight
Class:
GASOLINE
TRUCKS: 7300lbs
DIESEL TRUCKS: 7800lbs
Weights may
be adjusted by the officials during the season in order to keep the class
competitive.
Weights:
Added
weights are permitted. Hanging
weights may not extend more than 60 inches from the centerline of the front
axle. Any loss of ballast while
hooked to the sled is cause for disqualification.
No fuel or water may be added to the truck after it has crossed the
scales.
Hitch:
The
hitch must be stationary in all directions. The hitch's height from the ground
may not exceed 26 inches. The length
of the hitch measured from the center of the rear axle to the hitch point may be
no shorter than 27% of the actual wheelbase of the truck. The area where the
hook point is at must be free and clear of any obstructions. A truck may compete
with a Reese style hitch or may pull from the bumper as long as it meets the 27%
rule. The hooking point must
have a minimum 3.5 inch inside diameter opening.
No lever, pivot, axis or other types of ‘trick’ hitches are
prohibited. No vertical
hitches, all hitches must be 33 degrees or less parallel to the ground.
A second hitch is not required in this class.
Throttle:
Either
the normal foot throttle or an approved spring-loaded hand throttle will be
permitted in this class. (See
General Rules)
Kill
Switch:
All
trucks must be equipped with a Kill Switch per USA-EAST General Rules.
Tires:
Maximum
tire size for all trucks will be 35 x 12.50R with a maximum ground contact patch
or footprint of no larger than 10.5”
Tires must be DOT street-approved tires with the DOT number made visible
by highlighting so that officials can easily see the number.
Any tire without a DOT number is prohibited.
Cut tires are not permitted. Studded
tires and chains are not permitted. Dual
rear wheels are ONLY permitted for DIESEL trucks that completely meet all the
rules for the Pro Street division, Dual
wheels must fit within the original wheel wells for a dually pick-up.
An original equipment bed is required for all dual wheel applications.
Engines:
Any
Cast Iron OEM Block, or any Cast Iron OEM race or OEM reproduction performance
block is permitted. The engine must
be able to support a stock crank (although a stock crank is not required). Open
headers are permitted. Any cast iron
or aluminum or sheet metal intake is permitted.
Unlimited engine swaps between or within manufacturers are permitted.
The
engine must be in the stock location compartment.
The engine, if moved forward, must be behind the stock position of the
front grill as intended by manufacturer.
Grill position must be stock and may not be altered.
If engine is moved forward, the rear (back) of the engine block
must be a minimum of twelve inches (12") behind the centerline of the
front axle. Mini Trucks (S-10,
Ranger, Dakota, etc.) are permitted to run V-8 engines - location to be the same
as full-sized trucks.
GASOLINE ENGINES
must be naturally aspirated – no superchargers or turbochargers.
The use of a “split carburetor” will be permitted.
The
fuel may be any pump gasoline or any racing type gasoline.
No cubic inch limits.
DIESEL
ENGINES
are restricted to 6 cylinder and 8 cylinder compression ignition engines.
No cubic inch limits are in place. Diesel
engine must have been available in a one ton or less truck from the factory.
The fuel must be pump #1/#2 diesel only.
Soy or Bio-diesel fuel is permitted.
Diesel
engines may use an unlimited size single (1) turbo charger OR may use a twin
turbo set-up with each turbo to measure no more than 3.00 inches at the inducer
measured closest to the wheel. Compressor
wheel must protrude into three inch bore. A
Diesel engine truck running with out a muffler must have cross bolts installed
in their exhaust system. All inline
turbocharged engines must have one cable totally surrounding the engine block
and head.
a)
The
cable will be 3/8 inch diameter and lie between the 1st and 2nd
cylinders.
b)
Cable
must pass through the exhaust manifold port area.
c)
Cable
must have a minimum of two clamps at all splices.
d)
Cable
will have 4” to 6” inches of slack.
Master
Cutoff – Diesel Engines:
A
sled- and driver- operated spring loaded emergency air shut off is mandatory.
The cable must terminate into a two inch diameter steel ring.
Fuel
cutoff – Diesel Engines:
All
trucks must be equipped with a driver operated fuel shutoff capable of blocking
fuel flow to the injection pump. A three way dump valve is required.
Driveshaft
Loops:
All
trucks must have at least six inch wide u-joint shields around the rear u-joints
constructed of at least 1/4 inch steel or 3/8 inch aluminum that will safely
contain the u-joint and the ends of each shaft. In addition there will be at
least one shaft loop in the middle of the drive shaft. All shields must be
securely mounted to the vehicle. Any front shaft u-joint that is visible from
the side of the truck must be shielded to contain the u-joint and the end of the
shaft.
Flywheel
Shield:
All
vehicles equipped with a manual transmission must have a flywheel shield labeled
as meeting minimum SFI Spec 6.3 or greater. Applications for which an SFI Spec
flywheel shield is not available may use a properly attached SFI 4.1 or 4.2
blanket that completely covers the bell housing may be used in place of the
shield; it must be attached to the block and extend rearward to the transmission
with a minimum six inch overlap where it is fastened.
Transmission,
Manual:
After
market transmissions and transfer cases are permitted.
A clutch meeting minimum SFI Spec 1.1 or 1.2 is mandatory on all vehicles
that are collecting points. All transmissions must be clutch assisted.
Sequential shifters are prohibited.
Transmission,
Automatic:
Aftermarket
transmissions are permitted. Aftermarket torque converters, valve bodies and
internal components are permitted. Transmission brakes are prohibited. Any
non-OEM floor-mounted automatic transmission shifter must be equipped with a
spring-loaded positive reverse lockout device to prevent the shifter from
accidentally being put into reverse gear. A functional neutral safety switch is
mandatory. All transmission lines must be metallic or high-pressure type hose.
All vehicles with engines running 4500 RPM or more and using an automatic
transmission must be equipped with a transmission shield meeting SFI Spec 4.1
and must be labeled accordingly. A blanket-type shield, appropriately labeled as
meeting SFI Spec 4.1 and extending from the rear of the block to front of tail
housing with a minimum six inch overlap where it is fastened, is permitted. All
non-blanket-type shields must incorporate two (or one, per manufacturer’s
instructions) 3/4 inch by 1/8 inch straps that bolt to the shield on each side
and pass under the transmission pan unless the transmission pan is labeled as
meeting SFI Spec 4.1. All vehicles with engines running 4500 RPM or more and
using an automatic transmission must be equipped with a flex plate meeting SFI
Spec 29.1 and be covered by a flex plate shield meeting SFI Spec 30.1.
Fuels
and additives:
Alcohol
in any form is prohibited. Nitrous oxide is prohibited. Propane is prohibited.
All other oxygen extenders are prohibited. System components used for
these banned substances must be fully removed from the truck. Fuel checks may be
taken at any time by the officials.
Exhaust:
The exhaust on a GASOLINE vehicle may exit downward
at the back of the truck or directly out the back of the truck or straight up
through the hood of the truck or straight up at the back of the cab.
All
DIESEL vehicles must be equipped so as to direct exhaust upward.
Exhaust through the hood is permitted.
Two 3/8 inch diameter bolts must be placed in a cross pattern within one
inch of each other as close to the final turbo as is practical.
Driveline:
After
market transmissions and transfer cases are permitted.
Suspension:
No
suspension is required. A solid
suspension is permitted. Lift Kits
are acceptable.
Body:
The
body must be the OEM truck body with any OEM legal wheelbase.
A wooden flatbed is permitted in this class except for dual wheel
applications.
Firewall:
The
OEM firewall is mandatory.
Floor:
The
OEM floor pan, front to rear of cab area, is mandatory.
Removable sections
are permitted.
Batteries:
Batteries
must be securely mounted; they may not be located in the driver compartment.
Helmet:
Driver
must wear a helmet meeting Snell 85, 90, 95, 2000, K98 or SFI Spec 31.1 or 41.1
standards.
Driver
Restraint System:
The
OEM restraint system is mandatory and must be worn.