Quote Originally Posted by ecreek View Post
if I build for 10:1 will the engine ping on unleaded gas? also, how much can I shave the heads b4 taking away too much head strength? btw, thank you all for the info. I really appreciate your time and expertise. Ron
I'm running 10.3 static and need 91/92 octane, preferably without ethanol because it will lose seven or eight octane points over a few weeks sitting idle. If I were building it today I'd be down in the 9 to one range shooting for 87 octane.