Quote:

I made a piston stop that bolts directly to the deck. At first I just used a dial indicator on the piston itself, but quickly realized that there was about a 3 degree (guessing) period where the piston didn't move. So for best accuracy, I made the stop. I'm not sure exactly how far down in the hole the piston was stopping, but I know that it was hitting the stop 34 degrees on either side of TDC. Hopefully that made sense...



That why you set the indicator at your high point then go down in the hole a set amount, up stroke both direction, same technique as a piston stop. That 3-4 degrees of dwell time can play havoc.

Sounds like you have a good handle on it.