Quote:
Originally Posted by halflingsrock80
With the 64cc chamber can I still run 87 octane?
Also, I notice this is not "50 state legal"meaning no heat cross over for EGR. So any idea if the fact this is a more efficient head design makes EGR obsolete?
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Yes 87 would still work if tuned properly, check out Hot Rod Magazine, they've done a few dyno builds/ tests with these heads and cheap gas.
As far as EGR I'd say "kind of", it would be nice to keep the EGR but SBCs run fine without it, none of mine have ever had it. I think the heads have EGR provisions so it depends on the intake to keep it functional but it should be pretty easy to have EGR if you want it.
*Looks like I posted at the same time you did.