AC: An Allis Chalmers Tractor.
Allison: World War II vintage v-12
aircraft engine.1710 cu. In., approximately
Arias: Racing engine brand
common in Minis and TWD trucks.
Binder: International Tractor.
Boost: Air pressure generally by
turbos or superchargers.
Bore & Stroke: Diameter of the
cylinders and the distance the piston moves
up and down the cylinder.
Box: Part of a weight transfer
machine that carries and transfers the
Brush Pull: Non-sanctioned pull.
Cam: The camshaft, a revolving
engine part that moves the valves up and
Carb: The carburetor.
Chevy: A Chevrolet style
engine. Also referring to the Chevrolet
brand of cars and trucks.
Chevy Hemi: An engine that
uses a Chevrolet style block with Hemi style
heads. Arias is a common brand of this style
Class: Type of vehicle and rules
used to define that type of vehicle(s).
Modified, Super Stock (Open or Diesel), Two
Wheel Drive Truck, Mini Modified, Semi, Pro
Clay: The most desirable track
Cleats: The tread on a tractor
Cubes: Cubic inch displacement of
Cut Tires: Trim the tire bar to a
preferred angle for maximum bite.
Deere: A John Deere tractor.
Diesel: An engine that ignites the
fuel by the heat of compression, rather than
by spark plugs.
Drawbar: The part of the tractor
or truck which attaches to the chain and
hook of the transfer.
Drawbar Height: The distance
between the drawbar and the track surface.
Drop the Hammer: Hitting the
4 x 4: Four wheel drive.
FWD: Four wheel drive truck.
Fuel: Either Alcohol or Diesel
Full Pull: Pulling the entire
length of the track.
GN: Grand National level of
Gooney: A puller's helper.
Grenade- Damage to engine, usually
Headers: Exhaust pipes designed
for free exhaust flow.
Hemi: A Chrysler engine with a
dome-shaped combustion chamber.
Hired Gun: A driver who drives
tractors or trucks other than his or her
Hook: The point of attachment to
tractor's or truck's drawbar.
Hook Points: Points received for
attempting a pull. Each competitor can earn
15 per attempt.
Hooking Up: Tires getting a bite
on the track.
Horsepower: The ability to do a
specific amount of work during a specific
amount of time and over a specific distance.
IH: An International Harvester
tractor. (Also International)
Kill Switch: A required hook-up
that automatically kills the engine if the
tractor becomes unhooked from the
Mini: Small modified tractor, 2050
Miss the Balance: Improper weight
balance on a tractor, either too
light on the front resulting in an
uncontrollable wheelie, or too heavy on the
rear resulting in poor power transfer.
MM: Minneapolis Moline tractor.
Modified: Tractor using any
combination of engines, transmission and
Mopar: Chrysler products.
NTPA: The National Tractor Pullers
Out the Gate: A full pull, going
the entire length of the track.
Overspeed: A safety device on
turbine engines to keep them at a safe
operating speed. If achieved engine will
Pan: Part of the weight transfer
that makes contact with the track to create
the friction necessary to stop the tractor.
Pits: Area for pulling tractors
and trucks to park.
Points Champ: The person who has
won the most points at season's end.
Power Track: Track made with the
combination of water and clay to pack,
requiring a lot of power from the tractor to
pull the transfer.
Pro Stock: One turbo charger and
limited alterations being allowed in a
Pull-Off: A second pulling contest
for pullers going past the full pull mark.
Purse: The total prize money
awarded at an event.
Read the Track: Determine track
conditions (soil type, soil texture. etc.)
foweighting tractor and spotting sled.
Revs: RPMs or revolutions per
minute of the crankshaft.
Sanctioning: A contract, which
evidences the event's commitment to follow
national rules and regulations of the sport
and to provide a safe environment for the
participants and spectators.
Second Attempt: If, on the first
try, the tractor doesn't move the sled to
the 100 foot line, the puller can try again.
Skid: Pan of the sled.
Sled: Weight transfer machine.
Slider: A clutch which uses the
centrifugal force inherent in the spinning
of the clutch to activate the clutch
mechanism (also a Slipper Clutch).
Slip the Clutch: Prevention of
100% lock-up of the clutch, used to hook up
the tires to the track. Also means a
malfunctioning clutch which never locks up.
Smoke Machine: Used at indoor
pulls, attaches to weight transfer machine,
sucks exhaust smoke from tractor outside.
Smoker: Vehicle using diesel fuel.
SOHC: Single Overhead Camshaft
Spotting the Sled: Puller choosing
where the sled will sit along the start line
for the pull.
Squeaked It Out: Barely pulling
past the full-pull mark.
Staged: Lined up at the starting
line. Also connecting turbochargers in
progressive sequence on super stocks.
Super Stock: Refers to multiple
turbochargers with few limitations to
alterations in the given class.
Test Puller: First puller of each
class to check sled gear and weight. Has
option of re-pulling or dropping six
positions, or dropping to last.
Throw Weights: To move detachable
weight around on the tractor to achieve a
preferred balance of weight for track
Torque: The power needed to twist
or pull under counter pressure.
Transfer: Weight transfer machine
to which the tractor hooks to pull.
Turbine: An engine using the
exploding fuel to drive rotary fan blades,
creating the turning power of the engine, as
in aircraft jet engines.
Turbo: Turbocharger (an exhaust
powered compressor adding power to the basic
engine by adding more air).
TWD: Two wheel drive truck.
Under the Turbos: Not being
able to keep engine speed up to the proper
levels to maintain turbocharger pressure.
Weight Classes: 6200 Ib., 7200
lb., etc. The maximum weight of the tractor
and driver for a particular class.
Wheelie: Lifting the front wheels
off the ground.
Wrench: To repair, work on