Does the dyno measure wheel horsepower or engine horsepower?
4. A: The dyno measures wheel horsepower. Torque is a slightly different story, however. Since gearing has a direct bearing on torque and 1st gear would obviously generate a great deal more torque than 5th gear at the wheels, to return a useable number, the dyno actually gives you engine torque as measured at the wheels. It does this by factoring the engine rpm into the equation and negating the effect of the different gears. If this hurts you to think about it, then stop – just trust me.
