[Excaliber]

Rick over all those comrpession numbers sound a little high for my taste. I'd max out alloy heads at 10.5 myself, and get under 10 for iron heads. Perhaps that is a bit conservative, but only slightly so I think. I chose 9.8 for my iron heads.

With 92 octane on some occasions (really hot motor, idle just a tad to high) I get some 'run on' after turning off the key. I ran a tank of mix race gas (100 octane) and 92 octane and 'run on' totally went away under all conditions. Back to 92 and I have to be careful when I shut down the engine or it might happen.

This tells me I'm right on the 'edge' of max compression for Hawaii 92 octane.