That depends on a slew of things. How far the piston is down the hole, how big the valves are & how much lift the cam has, or actually the actual valve lift. Head gaskets selection also has a play on this
Lift (or max lift) has almost nothing to do with P to V. It’s not how far the valve opens, it’s when and how long it opens. Duration has the biggest impact on P to V clearance.
