Too much gear?

If, and I'm saying IF........you have that much detonation..........you better pull your engine and at a minimum put in a set of rod bearings before you lunch it.

As a question..........what are you running for gas?

I agree, 91 octane no oxygenated pump gas, i didn't see any aluminum specs on the plugs. I ran an in car video of one pass, I will get up on youtube.