Originally Posted by neu2this

I am from the old school. Went to the track with my turbo dyno, com lathe, box of brushes and springs. Would spend hours filing brushes to try and find a few hundred RPM on the dyno.

How do we do that with 17.5 motors? I know the dyno is like almost impossible. I hear people say they measure resistance --- but how? With what device?

I have seen those motor checkers - but what do they really measure?

Thanks for any help guys.