How to Calculate a Harley's Horsepower
- 1). Multiply torque by RPM.
- 2). Divide your answer by 5252. For example, a TC88 engine produces 84 foot-pounds of torque at 3,500 RPM. The horsepower would be 55.97.
- 3). Multiply horsepower by 5252.
- 4). Divide answer by RPM. Example: A TC88 engine records a maximum of 78 horsepower at 5,500 RPM. The engine torque would be 74.48.
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