I don't know if I have the exact number saved anywhere but yes I think it was around 11 to 1, still didn't ping audibly on 87 octane pulling a 65 dart on an open trailer up those big passes coming out of LA in the heat. Premium wasn't even needed in that thing. Ultra tight quench really works to keep down knock. I would liked to have pushed it higher but you can't mill a magnum any more than that without getting into the intake valve seat.

My current daily driver is a 4 door 4wd ram with 6.4 SRT8 short block with eagle heads, that has very high compression also around 11.5 I think and not very tight quench but does need premium and gets 20mpg doing 75 on the highway. Right now I am building a 6.4 SRT8 long block with 5.7 eagle cam for my 2011 ram 2500, I am going to zero deck the pistons to bump compression, (already milled the heads .020 to get closer to the eagle chamber size) and quench on this one, and am running the BGE head this time (same ports as SRT8 butt with faster heat conducting aluminum alloy and sodium ex valves) this truck will replace the current 1500 and I expect nearly the same MPG.