Classes
& Rules
2011 Smokin Iron Classes:
 Super
Farm Tractors
Two
Wheel Drive Trucks
Four
Wheel Drive Trucks
GN
Minis
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Super Farm
Tractors
Super Farm Tractors
(SFT) are closest to "off the farm" workhorses as you will find in NTPA
competition. Engine size is limited to 640 cubic inches, they must use
the OEM manifold and heads for that brand engine and can only use one
three inch turbo. Diesel fuel is still the only permitted fuel and tire
sizes are also the same as Pro Stock Tractors. The fuel pump is limited
to a "P" type pump and competitors must use the stock intake and
exhaust manifold for that brand engine. The Super Farm class is
extremely competitive and any competitor has a shot at winning.
Two
Wheel Drive Trucks
These are the
"Funny Cars" of tractor pulling - the "wheel standers". You are as
likely to see a Ford Thunderbird in this division as you are to see a
T-bucket, you could see a Chevrolet S-10 or a Willy's Jeep. Regardless
of the vehicle bodies, they will all be powered by a big block V-8 with
a super charger in most cases, but with a sprinkling of turbo-chargers.
This division competes at a weight of 6,200 lbs.
Four Wheel
Drive Trucks
Perhaps the closest
in appearance to what the average pulling fan drives on the street, the
Modified Four Wheel Drive trucks are also the only "naturally
aspirated" division in NTPA competition and utilize both rear and front
wheels to pull. With no turbo charger, or super charger to force air
into the engine, a competitor in this division must rely on the engine
itself to pump as much air as possible and that means that engine
settings like the proper air/fuel ratio are more important than ever.
Chassis setup, gearing, tire pressure, and the driver all must be
perfect to win in this division.
GN Minis
2011
NTPA Rulebook
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Click
here to order a copy of the NTPA 2011 Pulling Rulebook.
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2011 CLASSES
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Super
Farm Tractors
Two
Wheel Drive Trucks
Four
Wheel Drive Trucks
GN
Minis
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