Originally Posted by Caballerokid
All very true, but I have heard running aluminum heads since they cool more rapidly than steel will run cooler and effectively act as if you have one less point of CR such as 10:1 steel and 9:1 aluminum. Is this not the case? Like I said previously, I have no problem running race fuel I have already implemented a blend but I plan to run more of a blend if not straight race fuel.
aluminum is a little more detonation resistant then iron but to think you can get away with over 11:1 with pump fuel isn't going to happen on a standard sbc.