Adding 3cc to chamber volume, no other changes, it will be about 8.5:1.
The difference in the cr is not enough to make much difference so unless you are after more air flow(more HORSEPOWER) you don't need to change heads.
I have done a bunch of blower boats and a few cars and the AFR's outrun everybody out of the box. Yes, I have done a few back to back on the dyno to be sure.
How many are you trying to make??
Last edited by Hotrodrobert; 02-19-2008 at 12:04 PM.
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