No load on engine and torque? No load on engine and torque? riazumikah (Mechanical) (OP) 25 Apr 17 10:02 Hi guys, I was wondering, if an engine has no load on it, but is running at 1800RPM (roughly) would the torque output be 0? Thanks RE: No load on engine and torque? ivymike (Mechanical) 25 Apr 17 12:19 Did you mean something else when you said it "has no load on it?" RE: No load on engine and torque? CWB1 (Mechanical) 25 Apr 17 13:46 Like any measurement, torque is defined based upon reference from a zero point. Torque might be zero if you discount internal engine and dyno friction, if you include them it may be surprisingly large. RE: No load on engine and torque? Compositepro (Chemical) 25 Apr 17 17:22 By definition the torque output of an engine IS the load on the engine. RE: No load on engine and torque? tbuelna (Aerospace) 27 Apr 17 07:18 No load on the engine PTO would imply no braking torque applied. BMEP versus IMEP. RE: No load on engine and torque? BigClive (Chemical) 28 Apr 17 05:05 Maybe drive the engine at 1800rpm with an electric motor and measure the power needed to do this? There doesn't seem to me to be a simple way of estimating/calculating the power needed. RE: No load on engine and torque? dicer (Automotive) 9 May 17 01:20 If the measuring device is not loading the engine then it would essentially read zero. So yes output is zero. Internally still takes torque and power to move the mechanical parts and the air.