My potential compression ratio

blue missile said

octane,
those numbers seem really high to me as well. go on line and find "pat kellys" DCR calculator. and confirm those numbers with that.
It requires more input but seems to be very reliable.
If I remember correctly, A DCR in the 9s puts you at or above 93 octane.
Andrew

Click to expand...

Following Pat Kelly's article and CR calc found here I get confirmation that my DCR will be up the 9s, according to Kelly's calc, 8.93479 to be exact

Best available fuel around here is 91 octane

I either have to scrap the idea of having optimal quench or go to a different piston or live with a detonation-prone engine - none of these options excite me greatly