Quote:
Originally Posted by denniskliesen
Dave came from a different vendor sealed up with a Snyder box as usual. Yes new head. Another thing I don’t care for on these heads, should actually say the engine builder milled too much of the top of my block. There’s not enough clearance between the piston and head. Too little squish area. I don’t think you need 120 psi compression test.
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Have you measured the piston to head clearance? For efficiency and resistance to detonation, you want the piston as close as possible without danger of touching. How much was milled off the block? If too much, the block could possibly distort when the head is torqued, causing part of your problem. Original pistons were above the block surface at TDC.