Piston Stop Advice
First of all what engine is this for?
Depth is not all that critical. You are not trying to stop the engine at TDC, but rather "at some point" as the piston comes up. As the piston comes up, to, and over TDC, it slows down, so "down some" is more accurate than "right at the top."
What you do is, bump the piston on the stop in normal direction, then go around all the way and bump in the opposite direction. You mark the balancer with temporary marks at each "stop" and this creates two marks --which are equidistant from TDC.
Biggest single thing (and something some commercial ones are not good) is that the stop much be rigid and not move
I made mine for a SB and have had it since the SEVENTIES!!!
This commercial one which is adjustable does not seem to have a jam nut to lock the stem, an example of one that might not stay in one place. If you could add a lock nut it would probably be OK:
First of all what engine is this for?
Depth is not all that critical. You are not trying to stop the engine at TDC, but rather "at some point" as the piston comes up. As the piston comes up, to, and over TDC, it slows down, so "down some" is more accurate than "right at the top."
What you do is, bump the piston on the stop in normal direction, then go around all the way and bump in the opposite direction. You mark the balancer with temporary marks at each "stop" and this creates two marks --which are equidistant from TDC.
Biggest single thing (and something some commercial ones are not good) is that the stop much be rigid and not move
I made mine for a SB and have had it since the SEVENTIES!!!
This commercial one which is adjustable does not seem to have a jam nut to lock the stem, an example of one that might not stay in one place. If you could add a lock nut it would probably be OK: