I am certain you are correct, but we are trying to help figure out an unknown build. 180 psi and up on an unknown combo is at least enough to consider as a possible issue.
I agree but again there is more to detonation than just cylinder pressure. Are you suggesting he pull the engine apart and change the compression so as he can now safely say that he is what other people consider safe territory for cylinder pressure?
I haven't seen any mention of initial timing or what his advance curve is like from the OP? Where is it detonating? is it detonating in the lower rpms or higher rpms?
