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In Reply to: What is the pull rating of a Super C? posted by John on Saturday, August 11, 2007:
Your truck's engine numbers are derived in the lab. Tractors are tested in the real world, so 20.7 HP at the drawbar is what is really available to pull with. Your truck's engine is designed to put out max HP and torque at a much higher RPM than a tractor engine, so as an example you can rev up the truck to 4500 RPM and dump the clutch and jerk out a tree stump with minimal control while doing it, or use a tractor at 1200 RPM in the lowest gear and pull out a tree stump with much more control and safety. It's mostly low rpm torque, lower gearing and better weight distribution that allows the tractor to do more. A horsepower has been and continues to be 550 foot pounds per second (most live horses can not achieve this).