piston question
#1
piston question
ok my 383 is at 9.5 compression with stock unported heads and i would like to get some ai or le heads but if i do my compession will go down even more and i am not wanting to boost it. so what pistons should i go with i know it should be higher than stock compression but what pistons are good out there...
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#12
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What are you using for numbers to calculate compression. My heads are milled a bit to get compression on the stock shortblock, they are just over 53cc, stock aluminum heads are 54-56 or so with some claims of 58cc. Most pistons use 64-76cc when giving compression specs in catalogues because those are common gen 1 motor head sizes.
#13
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I'm not quite following how having your heads ported, will result in LESS CR. Unless you are, for some reason (boost?) having the compression chamber milled out a bit o_0 If you want a bit more CR, get your block 0-decked and heads shaved a bit, along with the Impala head gasket.