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
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 weight.
Brush Pull: Non-sanctioned pull.
Cam: The camshaft, a revolving engine
part that moves the valves up and down.
Carb: The carburetor.
Chevy: A Chevrolet style engine.
Also referring to the Chevrolet brand of cars
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 Stock, etc.
Clay: The most desirable track surface.
Cleats: The tread on a tractor tire.
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
Drawbar Height: The distance between
the drawbar and the track surface.
Drop the Hammer: Hitting the throttle
4 x 4: Four wheel drive.
FWD: Four wheel drive truck.
Fuel: Either Alcohol or Diesel fuel.
Full Pull: Pulling the entire length
of the track.
GN: Grand National level of pulling.
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
Hired Gun: A driver who drives tractors
or trucks other than his or her own.
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
Horsepower: The ability to do a specific
amount of work during a specific amount of time
and over a specific distance. Abbreviated HP.
IH: An International Harvester tractor.
Kill Switch: A required hook-up that
automatically kills the engine if the tractor
becomes unhooked from the sled.
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 final drive.
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 shut down.
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 class.
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
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
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 engine.
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
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 conditions.
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
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 tractor.