This is not a BB of old with detonation issues at 9 to 1. They tolerate compression waaaay better. I have just over 11.5 in my very heavy 2011 4 door 4x4 1/2 ton 6.4 SRT hemi short block 3.55 gears and like I have said, no pinging on the knock sensors on premium pump gas. Also the early 5.7 is not going to be as high as everyone says when you actually measure it yourself, I have done it and it is barely around 11 to 1 with a stock head gasket. Measure everything yourself and tell us what you actually get, don't just go off internet numbers, often they are going off what they heard from someone else or what the manufacturer threw out that may or may not be (most likely not) close to reality.