Quote:
Originally posted by Sean Teague
Static compression is not the only thing to look at when determining what is streetable. You have to look at the valve events of the cam and see how much overlap there is as well. A cam big enough for a 408 should have at least some overlap which will bleed off some of that 10.5:1 compression. You'll have to take that into account as well.
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I've got 264I/272E @.050, .680 lift and 106* LS. That is a whole bunch of overlap. It bleeds off enough cylinder pressure at street rpm's that detonation is not a problem, even when I had 11:1. At rpm's that it is run at on the track or dyno, that same cam is making cylinder pressure high enough to require 25% race gas mix to be safe.