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NORTHWEST
HOT STOCK DIESEL 4 X 4 TRUCK
1.
Class Requirements---The
Hot Stock Diesel category is designed for full-bodied street or track trucks.
Valid DOT registration and license plates are mandatory.
2.
Class weight breaks---8000
lbs. Weight is with driver.
3.
Engine—The
engine is restricted to 6 cylinder or 8 cylinder compression ignition engines.
All vehicles must have an OEM engine.
4.
Cooling System—Radiators
must be in the stock location and at least stock size.
5.
Exhaust—All
vehicles must be equipped to direct exhaust upward.
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. (See also rule
#37.)
6.
Fuel—The
fuel must be pump #1/#2 diesel only. Soy/biodiesel
fuel is permitted.
7.
Nitrous Oxide—Nitrous
oxide is prohibited. All other
oxygen extenders are prohibited. System
components must be removed from the truck.
8.
Propane—Propane
is prohibited. System components
must be removed from the truck.
9.
Water Injection—Water
injection is permitted. Alcohol,
methanol, and all other flammables are prohibited.
Commercially available pump lube is allowed.
10.
Turbocharger—Turbochargers
are limited to single stage set ups limited to 3.0 inch inducer bore on the
turbo; the bore will be measured using a 3.1 inch slug.
11.
Driveline—An
OEM transmission and transfer case is mandatory.
It must have been an option on a one-ton or smaller pick up.
12.
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.
13.
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.
14.
Transmission, Automatic—Non-OEM
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 tailhousing 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.
15.
Transmission, manual—Non-OEM transmissions are prohibited.
A clutch meeting minimum SFI Sec 1.1 or 1.2 is mandatory on all vehicles.
All transmissions must be clutch assisted.
Sequential shifters are prohibited.
16.
Brakes—Four-wheel
hydraulic brakes are mandatory.
17.
Suspension, Front—The upper mounting point for strut assemblies must be in the factory
location. Adjustable caster/camber
pillow ball mounts are permitted. The
lower control arm may be strengthened provided factory-mounting points to
chassis are maintained. The lower
mounting point for the strut assembly may be modified for improved caster or
camber. Strut tower braces, lower
tie bars, sway bars, and limited straps are permitted.
Traction bars and devices are permitted.
The final decision rests with the DHRA Technical Department.
18.
Suspension, Rear—An OEM style suspension is mandatory.
Lowering the vehicle height with suspension modifications is limited to
no more than three inches. Raising
the vehicle height with suspension modifications is limited to no more than five
inches. Tractions bars and devises
permitted. They must be bolt on
only; welds are permitted for attachment to the frame or axle housing.
Control arms may be strengthened or replaced, provided all original
mounting points are retained. Strut
tower braces, lower tie bars, sway bars, limited straps, and camber kits are
permitted. The rear suspension must
maintain a minimum shock travel of one inch.
All rear suspensions must use at least one working shock absorber per
wheel.
19.
Rear End—Non-OEM
rear end housings are prohibited. The
rear end must have been an option on a one-ton or smaller pick up.
Rear axle bolts must be covered by a cap shield.
20.
Ballast—Ballast
is permitted. Hanging weights must
not extend more than 60 inches from the centerline of the front axle.
21.
Chassis—An
OEM chassis with complete OEM 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 full factory frame.
22.
Wheelbase—The
vehicle must retain the original factory wheelbase and track width for the body
used.
23.
Hitch—“REESE”
style only, reinforcements permitted. No
type of trick hitch will be allowed on the vehicle.
The hitch must be horizontal to the ground and stationary in all
directions. The hitch’s height
from the ground may not exceed 26 inches. The
hooking point must have a minimum 3.00 inch inside diameter opening for the sled
hook. The hooking point will be
measured to the center of the clevis hoop.
24.
Tires—Tires
must be
DOT street
tires only.
Cut tires prohibited.
25.
Interior—A
complete interior, including dashboard, door panels, headliner, etc., is
mandatory. Aftermarket seats are
permitted, they must be fully upholstered. All
factory controls (lights, signals, horn, windows, wipers, etc.) must be retained
and be operative.
26.
Body—The
body must be the OEM truck body. Fiberglass
body parts are prohibited.
27.
Firewall—The
OEM firewall is mandatory.
28.
Floor—The
OEM floor pan, front to rear, is mandatory.
29.
Street Equipment—Complete headlight and taillight assemblies (all) are mandatory and
must be operative. Complete OEM
windshield and windows are mandatory. Windows
must be operative per factory specifications; that is, they must open and close
via electrical or OEM mechanical means.
30.
Batteries—Batteries
must be securely mounted; they may not be located in the driver compartment.
31.
Master Cutoff—A
sled and driver operated spring loaded emergency air shut off is mandatory.
The cable must terminate into a two inch diameter steel ring.
32.
Fuel Cutoff—All
trucks must be equipped with a driver operated fuel shutoff capable of blocking
fuel to the injection pump. A three
way dump valve is recommended.
33.
Fire Extinguisher System—A
Fire Extinguisher System is permitted. It
must be securely mounted.
34.
Credentials—All
drivers must have a valid state driver’s license.
35.
Driver Restraint System—The
OEM restraint system is mandatory and must be worn.
36.
Helmet—The
driver must wear a helmet meeting Snell 90, 95, 2000, K98, or SFI Spec 31.1A,
31.2A, 41.1A or 41.2A standards.
37.
Street Stock Diesel—Only vehicles that maintain Factory Dimension, Turbo Chargers &
Exhaust Manifold will be permitted to run with out SFI specifications or
vertical exhausts.
Street Stock Diesel--Only vehicles that maintain Factory Dimension, Turbo Chargers & Exhaust Manifold will be permitted to run with out SFI specifications or vertical exhausts.
STREET
STOCK SEMI
1.
All trucks must have valid plates
and insurance. VIN must match owner’s card and insurance card.
2.
A truck must be capable of pulling
a trailer. No haul ins.
3.
Air suspension may not be adjusted
at any time after hitch is installed. No
blocking or chaining of axles.
4.
Weight 20,000 pounds.
5.
Fuel pumps must remain visually
stock for manufacturer of said engine.
6.
Fuel—pump diesel only.
No other types of fuel or oxygen (02) accelerators are
permitted.
7.
Seat belt is required to be worn
while pulling the sled.
8.
Helmets are not required.
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