joel_400 59 #26 Posted March 15, 2017 Yes hp equals torque x rpm/5252. By cutting the speed of the dyno in half I double the torque output, however by doubling the length of the arm to measure I have in turn managed to have a corrected torque reading. Therefore using the engine rpm read off of the tach in the forMula I get the hp rating. Joel 2 Share this post Link to post Share on other sites
