Grand National Open (Alcohol) and Diesel (Diesel fuel only) tractors run with a 20” drawbar and weigh 8000 pounds. and the agricultural rearend tractors at 6500 lbs. Light Super Stock Tractors at RN level only will run component tractors at 6200 lbs. Heavy Super Stock tractors at Regional level will run 20” drawbar with the weight at 8000 for alcohol and 8300 for diesel. Super Stock Tractors- Diesel or alcohol powered, multiple turbo chargers. Unlimited (GN)- 8,000 pounds, any power plant making weight. Modified (GN)- 7,500 pounds, 4 blown automotive engines with 8-71 blowers, 3 blown automotive engines with 14-71 blowers, 2 Allison aircraft engines, 2 industrial or marine engine 12 cylinder limit, combination of NTPA recognized turbine engines not to exceed a maximum of 5800 total horsepower and other combinations. Light Unlimited (GN)- 6,000 pounds, no turbines.
Modified (RN)- 7,500 pounds, 3 blown automotive engines with 8-71 blowers, 2 blown automotive engines with 14-71 blowers, 1 or 2 Allison aircraft engines (based on blower type), 1 industrial or marine engine 12 cylinder limit, combination of NTPA recognized turbine engines not to exceed a maximum of 5050 total horsepower and other combinations. All divisions of the Modified class use a maximum of a 20” drawbar and 30.5 x 32 tires. Modified Tractor- The class began as farm tractors with non-tractor engines and grew into fully custom machines with multiple engines and power plant types. Trucks come in two wheel drive, four wheel drive (naturally aspirated, blown, diesel) and semis. Engines include drag racing automotive type, jet turbines, aircraft and industrial engines in various configurations. Modified tractor limits are based mostly on weight. Various classes have been developed for tractors based on limitations in the rules. Tractor pulling is a sport based on horsepower and torque, which means that the engine must be modified to generate as much power as possible.
Tractor pulls pictures full#
If more than one competitor reaches the full pull mark, a pull-off is held to determine a winner.Ĭompetition-level tractors might look like standard-issue farm equipment, but the similarities stop at the basic body and tires. Pulling this ever-increasing load eventually causes the vehicle to lose forward momentum and torque, although a rare few might indeed reach the end of the course, known as a “full pull.” The distance from start to finish is measured in thousandths of an inch and the tractor that pulls the sled the farthest distance is declared the winner. The sled contains a box filled with weight that is mechanically winched forward as the sled progresses along the course. Tractor pulling is a competitive motor sport in which modified farm tractors, modified tractors or trucks drag a metal sled along a prescribed course.
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The pulling track is a minimum of 30 feet wide by 320 feet long. Different to every other motorsport in the world, it is not about the speed, but distance pulled. Tractor Pulling is known as “the world’s heaviest motorsport.” The goal of tractor pulling is to determine the strongest machine and the best driver.
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