This page will give you a little bit of info on this new class and lay out the rules by which all competing trucks will be built.
We look forward to coming to your local fair so please keep us in mind.
The Main Highlights of this class are:
-Compound Turbochargers
-1300+hp
-Water injection
-Weight boxes
-Track Only Trucks
-Hood Stacks
-Improved Driveline and Frame
-Air and Fuel Shutoffs
-Transmission bellhousing Shielding
-SFI approved Components
-Very Fast paced Development
-Highly competitive Drivers
Updated and approved Rules for 2010-2011 seasons
Body/
Chassis
The
Pro Modified Diesel category is designed for full-bodied street or track trucks.
Weight is with driver.
1.
The body must be the OEM truck body. Fiberglass body parts are prohibited. The
OEM firewall and OEM style floor pan, front to rear, is mandatory. Complete OEM
windshield and windows are mandatory. Functional Back up lights are mandatory.
Batteries must be securely mounted; they may not be located in the driver
compartment.
2.
An OEM chassis with complete OEM style floor pan and firewall is mandatory.
Wheel tubs, back-half conversions, tube chassis, etc., are prohibited. The
engine must be in the OEM location for the body used. The vehicle must retain
the factory frame. Modifications
to truck box are permitted but trucks must either run a full bed floor or a
tonneau cover.
3
All engines are to be shielded with heavy rubber belting or 0.060 steel. E.g.
Steel inner fenders or rubber belting covering everything above the frame to the
deck of the motor.
4.
The vehicle must have an OEM wheelbase and maximum track width of 102”. (FRONT
AND REAR)
5.
Front weight is permitted. Hanging weights may not extend more than 60 inches
from the centerline of the front axle. They must be securely mounted.
6.
Driveline
and Axles
A) Any axle, any transfer case, any transmission is permitted.
No Planetary rears are allowed
Axle
and hub bolt shield required
a)
Shield
must be at least 0.060 inch thick.
b)
Minimum
diameter of axle end or hub bolts to be covered on both front and rear axles.
c)
Mounting
shield cannot be mounted to axle end or hub bolts.
d)
A
hole may be installed in centre of front shield so lock can be operated as long
as hub end or axle bolts are covered
7.
An
OEM-style Front or Rear suspension is NOT mandatory.
A) Traction bars and devices permitted.
B) Strut tower braces, lower tie bars, sway bars, limit straps, and camber kits
are permitted.
C) Blocking, welding and four linking are permitted.
D) Air bags must be unhooked from compressor
8.
Working Brakes are mandatory on front wheels only.
Driveline/Driveline
Shielding
9.
Vehicle must have at least 5 round Metal hoops shielding drive shafts.
A)
A Min of 3 hoops around the Driveshaft tube.
B)
In addition there must be 2 end
loops that cover the universal joints.
C)
All Hoops must be a minimum of 3/8-inch aluminum or 5/16 steel, 3/4 inch wide
and not more
than 2 inches from the shaft in any direction. They must completely (360
degrees) cover the
shaft
D)
May use solid tube (3/8 aluminum or 5/16steel) to meet the above
requirements.
10.
Transmission
A) All
manual transmissions must be clutch assisted. Sequential shifters are
prohibited.
B)
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.
C) A
functional neutral safety switch is mandatory.
Hitch
11.
The hooking point must be the rear-most point on the vehicle.
12.
The hitch must be horizontal to the ground and stationary in all directions
hooked to the frame no further ahead than the center of the rear axle.
13.
The hitch's height from the ground may not exceed 26 inches (measured at top of
hitching device).
14.
The hooking point must have a minimum 3.50-inch inside diameter opening for the
sled hook
Tires:
Tires
must be stamped DOT approved with a maximum height of 35 inches and mounted on
rims no wider than 14 inches.
Tire
Tread alterations are allowed to a max of ¼ “of wear bars
No
Bar or Terra Tires Permitted
Dual
Wheels are permitted
The
use of a dually spacer on the front axle can only be used in conjunction with
the use of an off-set dually rim.
Engine:
18.
The engine is restricted to a single 6 cylinders or 8-cylinder compression
ignition engine.
A)
Maximum displacement of 7.6lt (466cub in) all vehicles must have an OEM style
engine that came in a 1 Ton pickup or less. (Conversions are allowed)
B)
NO
Engine driven Fans permitted
C)
Balancers must be SFI Approved
D) All
engines must have OEM heads
E)
Mechanical or electric Fuel injection is permitted but is limited to the maximum
injection pump size of a P-Pump. NO FUEL IS TO BE INJECTED IN ANY OTHER WAY THAN
WITH THE INJECTION PUMP SYSTEM.
F)
If Vehicles are found to emit excessive engine fluids they must be equipped with
a catch can to collect all liquids from the engine’s vents & overflows.
Catch can’s must be able to collect all liquids normally expelled from the
vehicle during the pull. Can’s must be a closed container with an inlet
and a vent
19.
All vehicles must be equipped to direct exhaust straight up (no curve outs)
either in box or out of hood. All hood stacks must be at least 12 inches over
the sheet metal. Two Grade 5- (3/8-inch diameter) bolts must be placed in
a cross pattern within one inch of each other directly behind the final turbo.
20.
Fuel must be pump #1/#2 diesel only. Soy/Biodiesel fuel is permitted. No Diesel
fuel must enter the Cab.
21.
Nitrous oxide is prohibited. All other oxygen extenders are prohibited. System
components must be removed from the truck.
22.
Propane is prohibited. System components must be removed from the truck.
23.
Water injection is permitted. Alcohol, methanol, and all other flammables are
prohibited. No dry ice commercially available pump lube is allowed.
24.
Turbochargers are limited to dual stage compounding turbo’s. Atmospheric
(Final) is limited to a 3.20” inducer bore measured with a 3.25-inch slug.
Single turbo’s are unlimited in size.
Safety:
All
trucks to be equipped with hood pins only: no cable operated secondary latch
mechanisms.
Manual
Transmission
1.
All vehicles must have a properly attached SFI 4.1 or 4.2 blanket that
completely covers the bell housing. It must be attached to the block and extend
rearward to the transmission.
A) A
clutch (including a flywheel) meeting minimum SFI Spec 1.1 or 1.2 is mandatory
on all vehicles.
B)
All transmissions must be clutch assisted. Sequential shifters are prohibited.
Driveshafts between engine and
transfer case must have solid shielding a minimum of 3/8inch
aluminum or 5/16 inch steel.
Automatic
Transmission
A) All
vehicles must be equipped with a blanket-type shield meeting SFI Spec 4.1 and
extending from the rear of the block to front of tail housing.
B) All
vehicles must be equipped with a flex plate meeting SFI Spec 29.1
C)
All transmission lines must be metallic or high-pressure type hose.
2.
A sled- and driver- operated spring-loaded emergency air shut off is mandatory.
The cable must terminate into a two-inch diameter steel ring.
3.
All
trucks must be equipped with a driver operated fuel shutoff capable of
redirecting fuel flow from the injection pump back to the tank. E.g. In line
three-way dump valve.
B)
Electronic Fuel injection trucks must be equipped with injector pulse
kill switch
4.
A
2 LBS or larger ABC fire extinguisher is mandatory. It must be securely mounted
on Passengers side Floor.
5.
All drivers must wear a fire suit meeting a minimum of SFI 3.2 A/1 and wear
leather steel toe boots.
6.
All drivers must have a driver’s license.
7.
The OEM or aftermarket restraint system is mandatory and must be worn.
8.
The driver must wear a helmet meeting DOT standards
Additional
Rules
1.
Driver’s window must remain down during pulling.
2.
NO VEHICLE IS TO BE LEFT UNOCCUPIED WHILE RUNNING AT ANY TIME.
Class
Rep: Heath Mulock (705) 439-3298