gunrunnerjohn posted:Joe, I'd look for a new flywheel sized for the Pittman motor and see if you can bring sanity back to the mix.
Another option, if the running characteristics with no flywheel isn't objectionable, consider a much lighter flywheel, less mass to vibrate at high speed. Anything round like a model car wheel with a flat tread could be pressed into service for the tach tape.
John, I made a flywheel out of hollow plastic cap. It isn't the main source of the noise. It adds to it at the insane rpm. Just the wind noise of anything spinning at that rpm is high. I took the flywheel out of the picture and the mechanism is still loud. It makes me want to look closer at how my MTH steamers run so quietly.
The original flywheel mounted to the stock motor was not out of balance. I'm quite sure of that, even more so now than ever.
