Heat Range Experts: What plug to use?

EvilScamp: What is your 340's compression ratio with the N12Y? I am thinking that a set of those will work in my 9.4 360.

SixPack: What about the RN11YC plug in the 340? What compression ratio are you putting these plugs into. Maybe I should try that in my 9.5 340 instead of the Bosch Platinum plugs.