Quote:
Originally Posted by flatjack9
Unless you are ordering special pistons, deck height is not listed for flathead pistons. I find that most of the pistons bought these days end up with the edge of the piston below the deck. Not ideal, but that is what you get these days.
|
This is especially true in modern SBCs, SBFs, etc.. By having the piston "down in the hole" a bit, they didn't have to worry about quench as much and pistons won't be hitting heads (especially the 'smog motor era'). It is kind of a "punt" by the manufacturers - starting with GM and Ford themselves.
I 'zero and square deck' almost everything I build - because I want my quench to be exactly what it needs to be. I usually run about a .040 quench on SBC type engines as well - and with a stocking piston, that usually means the block has to be decked. In the higher quality forged pistons, they will specify the exact Compression Height - end the builder must figure out if they want to use that piston, deck the block or find another piston (if it is down in the hole a bit).