Agree also... Reason saying or asking is bc if there is not much more difference then why run 11.1-12.1 and need race fuel instead of running 10.1 and cheaper gas? Or is there really a noticeable difference? Let's say for a base to answer the question, using a camshaft like 255-265 dur @ .050 with LSA from 106-108.. Both can be run on pump or race fuel depending on setup. But why make it have to run on race fuel if your really not getting that much gain??? See where im getting at? Just seeing the Truth about all this hype on compression