Quote:
Originally Posted by 1973oldsomega
Yeah i know they are 77cc chambers. I just havnt made up my mind if i want to get them milled down or not. 9.1 comp isnt too bad but 10.1 or even 10.5 to one would be better. Where is the line when you cant run on pump gas anymore what comp ratio is that?
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It all depends on the combination. Cam, where it is installed, timing curve, quench, chamber design, and A/F mixture are just a few factors. IMO, if you are not very experienced at tuning, keep it right at 10 to 1 with those heads.
What are you looking for out of this thing?