Technical Pistons down in the hole variance

So you are saying you just assume piston to head clearance and valve to piston clearance should be taken for granted and let the chips fall where they may,.......


Edited ...

 

Depends if you trust your machinest. If the answer is no than maybe you need to find another one. . 010 difference on a street engine is just fine. I would be way more concerned about combustion chamber size if you are that worried about static compression.

 

It's not about static compression, it's about insuring that part tolerance stack up in components purchased from different sources don't cause harm to each other. It's possible that the .010 difference may not be the only issue. Maybe the deck is .010 too short and a reconditioned rod is a little longer, and the crank journal is not indexed perfectly......all those things can stack up. If you don't check.......you don't know.
Lots of engines have been thrown together without checking much and lasted a long time. The law of averages says it will work......the law of averages also says sometimes it won't.