Super Street
The Super Street (SS) class is designed for full-bodied pulling
trucks. The vehicle must be four-wheel drive.
Designations: SS
Weight: 8000 lbs. Maximum with driver.
REGULATIONS
Ballast: Ballast is permitted. Hanging weights may not extend
more than 60 inches from the centerline of the front axle.
Batteries: Batteries must be securely mounted. They may not
be located in the driver compartment.
Body: The body may be any 3/4-or 1-ton full-sized pickup
truck body. The body must retain full sheet metal. The full bed
floor must remain intact. Alternatively, two one-hundred pound
weights may be placed directly over the centerline of the rear
axle in lieu of the bed floor. Metal after-market hoods are
permitted. Fiberglass is prohibited. Tilt-bodies are prohibited.
The hood must be closed and securely latched while the
vehicle is hooked to the sled.
Brakes: Front disk brakes are mandatory.
Chassis: The OEM chassis is mandatory. The engine must be
in the OEM location for the body used. The vehicle must retain
the full OEM chassis. Wheel tubs, back-half conversions, tube
chassis, etc., are prohibited.
Credentials: All drivers must have a valid state drivers license.
Driveline: Open.
Driver Restraint System: The OEM restraint system is
mandatory and must be worn snugly. Alternatively, a threeinch-
wide driver restraint system labeled as meeting SFI
Spec 16.1 is permitted; this system includes a crotch strap
and must be updated at two-year intervals from date of
manufacture.
Driveshaft Loops: All trucks must have at least six-inch wide ujoint
shields around the rear u-joint constructed of at least 1/4-
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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 ujoint
that is visible from the side of the truck must be shielded
to contain the u-joint and the end of the shaft.
Engine: The engine block must have been available as a
factory option on one-ton or smaller pickup trucks.
Exhaust: All vehicles must be equipped to direct exhaust
upward. Two 3/8 inch diameter bolts must be placed in the
exhaust pipe in a cross pattern within one inch of each other
as close to the final turbo as is practical.
Fire Extinguisher System: A fire extinguisher system is
permitted. It must be securely mounted.
Firewall: The complete OEM firewall is mandatory.
Floor: The complete OEM floor pan is mandatory.
Fuel: The fuel must be pump #1/#2 diesel only. Soy/Biodiesel
fuel is permitted.
Fuel Injection Pump: Open.
Fuel Shutoff: 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 recommended.
Helmet: Drivers must wear a helmet meeting Snell 90, 95,
2000, K98 or SFI Spec 31.1 or 41.1 standards. The retention
strap must be securely and snugly fastened The helmet must
have the appropriate certification sticker affixed inside it.
Harmonic Balancer: All engines must be equipped with
a harmonic balancer or damper meeting SFI Spec 18.1.
Alternately, If a harmonic balancer is not used and a tone ring
is in place, a shield across the frame under the front of the
motor shielding the damper and engine fan area is required.
Hitch: The hitch must be constructed of solid material that is
properly attached and braced. The hooking point must be at
least 44 inches rearward from the centerline of the rear axle.
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 loop.
The final decision rests with the NADM Technical Department.
Interior: The vehicle must be equipped with one seat for the
driver; it must be properly installed.
Intermediate Shafts: On vehicles so equipped, all intermediate
drive shafts must be fully enclosed with a 5/16 inch steel or
3/8 inch aluminum shield. The shield must cover the entire
length of the shaft and the universal joints and yokes at each
end.
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.
Nitrous Oxide: Nitrous oxide is prohibited. All other oxygen
extenders are prohibited. All system components must be
removed from the truck.
Propane: Propane is prohibited. All system components must
be removed from the truck.
Protective Clothing: Drivers must wear a jacket meeting SFI
specification 3.2A/5 or 3.2A/15. Protective clothing exceeding
this specification is permitted. The protective clothing must
be labeled with the proper SFI specification. The NADM patch
must be located in the upper-most position on the left sleeve
of the fire suit or jacket.
Rear End: Rear axle bolts must be covered by a cap or shield.
Suspension, Front: The axle centerline must remain in the
factory location. The final decision rests with the NADM
Technical Department.
Suspension, Rear: Rigid or 4-link suspensions are permitted.
Air suspension is permitted; the compressor must be
disconnected.
Tires: Tires must be DOT street tires only. Cut tires are
prohibited.
Tow Vehicles: Tow vehicles are permitted.
Transmission, Automatic: 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 is permitted; it must be appropriately
labeled as meeting SFI Spec 4.1 and it must extend from the
rear of the block to the front of tailhousing with a minimum six
inch overlap where it is fastened. All non-blanket type shields
must incorporate two (or one, per manufacturers 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.
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Transmission, Manual: A clutch meeting minimum SFI Spec 1.1
or 1.2 is mandatory on all vehicles. All transmissions must be
clutch assisted. Sequential shifters are prohibited. 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 bellhousing;
it must be attached to the block and extend rearward to the
transmission with a minimum six inch overlap where it is
fastened.
Turbocharger: Vehicles are limited to two turbochargers only.
Single turbos are unlimited. For multiple turbos, the inducer
bore on the atmosphere compressor housing(s) may be no
larger than 3.2 inches measured at the smallest diameter area
of the compressor wheel. A bushing may be used to downsize
the compressor housing ahead of the wheel. If a bushing is
used, it must be round, at least 3/4 inch long, mounted within
0.050 inch of the compressor wheel, and the inside diameter
of the bushing may not exceed the 3.2 inch limit. If you have
any questions regarding the construction of a bushing, contact
NADM Technical Services before the season starts. A stock
map width enhancement (MWE) groove is permitted. No MWE
groove may be wider than 1/4 inch. All provisions allowing
air to the wheel other than via the bore and MWE grooves are
prohibited. The
inducer bore will be measured using a 3.25 inch plug.
Water Injection: Water injection is permitted. Alcohol, methanol,
and all other flammables are prohibited. Commercially
available pump lube is allowed.
Wheelbase: The vehicle must retain the original unaltered
factory wheelbase and track width. Front dual-wheel spacers
may be used only with accompanying positive-offset duallystyle
wheels.
Modified Category
OVERVIEW
Modified Diesel
The Modified Diesel (MD) class is designed for off-road, fullbodied,
severely modified pickup trucks built for pulling.
Modified Rear-Wheel Drive Exhibition
The Modified Rear-Wheel-Drive Puller Exhibition (RW/E) class
is the same as Modified Diesel except that the trucks must be
rear-wheel drive only and the hitch height limit is increased to
30 inches.
Outlaw Diesel Exhibition
The Outlaw Diesel Exhibition (OD/E) class is the same as
Modified Diesel except that the trucks may have any engine
installed in them.
Designations:
MD
RW/E
OD/E
Weight breaks:
MD: 7600 lbs. Weight is with driver
RW/E: 7200 lbs. Weight is with driver
OD/E: 8000 lbs. Weight is with driver
REGULATIONS
Ballast: Ballast is permitted. Hanging weights may not extend
more than 60 inches from the centerline of the front axle.
Batteries: Batteries must be securely mounted. They may not
be located in the driver compartment.
Body: Any full-size truck body style is permitted. It must be
painted and reasonably free from rust. Customizing, chopping,
channeling, etc., are permitted, but the body must retain the
full-bodied appearance. The vehicle must have at least two
functional doors. The doors must open and close from inside
and outside. Glass may be replaced with Lexan or other
shatterproof material of 1/8 inch minimum thickness. The side
windows need not be operational. The hood must be closed
and securely latched while the vehicle is hooked to the sled.
Brakes: Front disc brakes are mandatory.
Cooling System: Any sealed system is permitted.
Credentials: All drivers must have a valid state drivers license.
Driver Restraint System: A three-inch-wide driver restraint
system labeled as meeting SFI Spec 16.1 is mandatory and
must be worn snugly. The system includes a crotch strap
and must be updated at two-year intervals from date of
manufacture.
Drive shaft Loops: All trucks must have at least six inch wide
u-joint shields around the rear u-joint 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 ujoint
that is visible from the side of the truck must be shielded
to contain the u-joint and the end of the shaft.
Engine: The engine block must be factory appearing. It must
accept a cylinder head from a one-ton or smaller pickup truck
compression ignition engine. For class OD/E, the engine may
be any engine.
Engine Shielding: A shield across the frame under the front
of the motor shielding the damper and engine fan area is
required.
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If fiberglass body panels are utilized forward the firewall, a
.060 steel or aluminum shield extending the full length of the
engine from the top of the frame rail to a level equal to the
deck height or the top of the fender well, whichever is greater,
must be in place.
Exhaust: Exhaust must be directed away from the fuel tank
and driver and exit upward. Two 3/8 inch diameter bolts
must be placed through the exhaust pipe in a cross pattern
within one inch of each other as close to the final turbo as is
practical.
Fire Extinguisher System: A fire extinguisher system is
permitted. It must be securely mounted.
Firewall: Each vehicle must be equipped with an OEM or
minimum 0.024 inch steel firewall, extending from side to
side of the body and from the top of the engine compartments
upper seal (hood, cowl, or deck) to the bottom of the floor and/
or belly pan. The firewall must provide a bulkhead between the
engine and/or fuel tank and driver compartment. All openings
must be sealed with metal-excluding grommets. The use of
magnesium is prohibited
Floor: Each vehicle in competition must be equipped with an
OEM or minimum 0.024 inch steel floor pan that extends the
full length and width of the driver compartment. Non-OEM
floor pans must have cross members (minimum two inch by
two inch, 0.083 inch wall thickness square tubing) installed
between the frame rails for proper seat and driver restraint
system installation and support. All openings must be sealed
with metal-excluding grommets. The use of fiberglass and/or
magnesium is prohibited.
Fuel: The fuel must be pump #1/#2 diesel only. Soy/Biodiesel
fuel is permitted.
Fuel Shutoff: All trucks must be equipped with a driveroperated
fuel shutoff capable of blocking fuel flow to the
injection pump. A three-way dump valve is recommended.
Fuel System: Location: All fuel tanks, lines, pumps, valves, etc.
must be located outside of the driver compartment and within
the confines of the frame and/or steel body. Fuel pressure
gauge isolators, with steel-braided line, may be mounted on
the firewall.
Lines: All non-OEM fuel lines (including gauge and/or datarecorder
lines) must be metallic, steel-braided or NADMaccepted
woven or woven-push lock. Fuel lines (except
steel-braided lines) in the flywheel/bell housing area must
be enclosed in a 16 inch length of steel tubing of 1/8 inch
minimum wall thickness and be securely mounted as a
protection against fuel-line rupture.
Harmonic Balancer: If present, units must meet SFI Spec 18.1.
Helmet: Drivers must wear a helmet meeting Snell 90, 95,
2000, K98 or SFI Spec 31.1 or 41.1 standards. The retention
strap must be securely and snugly fastened The helmet must
have the appropriate certification sticker affixed inside it.
Hitch: The hitch must be constructed of solid material that is
properly attached and braced. The hooking point must be at
least 44 inches rearward from the centerline of the rear axle.
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 loop.
The final decision rests with the NADM Technical Department.
For class RW/E, the hitch height is increased to 30 inches.
Interior: The vehicle must be equipped with one seat for the
driver; it must be properly installed.
Intermediate Shafts: On vehicles so equipped, all intermediate
drive shafts must be fully enclosed with a 5/16-inch steel or
3/8-inch aluminum shield. The shield must cover the entire
length of the shaft and the universal joints and yokes at each
end.
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.
Nitrous Oxide: Nitrous oxide is prohibited. All other oxygen
extenders are prohibited. All system components must be
removed from truck.
Propane: Propane is prohibited. All system components must
be removed from the truck.
Protective Clothing: Drivers must wear a jacket and pants
meeting SFI specification 3.2A/5 or 3.2A/15, gloves meeting
SFI specification 3.3/15, and shoes or boots meeting SFI
specification 3.3/5. Protective clothing exceeding these
specifications is permitted. The protective clothing must be
labeled with the proper SFI specification. The NADM patch
must be located in the upper-most position on the left sleeve
of the fire suit or jacket.
Rear Axle: Rear axle bolts must be covered by a cap or shield.
Suspension: Rigid or 4-link suspensions are permitted.
Tires: Tires may be no more than 36 inches tall.
Tow Vehicles: Tow vehicles are permitted.
Transmission, Automatic: 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
must be equipped with a transmission shield meeting SFI Spec
4.1 and must be labeled accordingly. A blanket-type shield is
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permitted; it must be appropriately labeled as meeting SFI
Spec 4.1 and it must extend from the rear of the block to the
front of tailhousing with a minimum six-inch overlap where
it is fastened. All non-blanket-type shields must incorporate
two (or one, per manufacturers 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 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.
Transmission, Manual: A clutch meeting SFI Spec 1.2 or 1.3
is mandatory. All transmissions must be clutch assisted.
Sequential shifters are prohibited. 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 bellhousing; it must be attached to the block and
extend rearward to the transmission with a minimum six inch
overlap where it is fastened.
Turbocharger, Supercharger: Turbochargers are limited to
triple-stage configuration. Turbocharger(s) must be enclosed
in the engine compartment; they may not be visible from
outside the truck. Turbochargers that are not under the hood
must be completely shrouded except for inlet/exhaust pipes.
Turbochargers under fiberglass hoods must be completely
shrouded except for inlet/exhaust pipes. Shrouding must be
equal to or greater than .060 steel or aluminum.
Water Injection: Water injection is permitted. Alcohol,
methanol, and all other flammables are prohibited.
Commercially available pump lube allowed.
Wheelbase: The minimum allowed wheelbase is 90 inches;
the maximum allowed is 180 inches. The maximum
wheelbase variation from left to right is one inch; the
measurement will be made using a X pattern (LF-RR and RFLR).
The maximum allowed treadwidth is 102 inches.