whats your dynamic compression and cylinder pressure? I have a 10:1 motor with about a 7.9 dynamic comp and she does just fine at 100oct (50/50 mix of pump 91 and 110 leaded)
I figure 100 octane would be just about perfect for the motor . I'm going to find the build sheet so I know exactly what the compression is . I do remember it was over 10.1 and that bothered me at the time .