Designing Engine Stand: Calculate Torque for 4000lb Semi Engine

[gjshafer]

I am in the process of designing an engine stand for a 4000lb semi engine. How do I determine the torque required to turn the engine at the end of the shaft?

 

[wsabol]

P = T*w

?

 

[W R-P]

couple the engine to a motor, get a tachometer. Increase the motor speed until the crankshaft starts to turn and read the motor speed. Referring to the performance chart of the motor,you can find the torque exerted at that speed.