Piston to head

How much clearance do you need. I here .030 all the time and was shooting for that. Ended up with .024 will this be enough? I'm using a .042 copper head gasket. This is a mod motor I'm hoping to turn it 8500-9000 rpms.

Virgil
 

Jimbo

A trial w/o witnesses is like racin w/o tech
The Kid sprint class uses the WF engine and you are allowed to have .035" pop up using the stock head gasket with a compressed thickness of about .045' and it seems to work OK.
 
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