I am wanting to do some bench testing on some of my car engines. The best way I can figure to put the same amount of "load" on each engine is by using a prop from a plane and then take RPM readings off of the prop. but I am not sure how to attatch a prop to a car engine that has an SG shaft. I could use a threaded clutch bell and drill the hole in the prop out enough to get it to fit over the threads but I am not sure how i would get the engine started from there since all my engines are bump start only. can this be done somehow? Does anyone have any ideas for me?

Also, any one know of a tach that reads higher than 32,000 RPM? Some of my engines will crank out over 40,000 RPM and the mini hand held tacks I have found only read up to 32,000 RPM

How do I get this


on this?