W/r/t "big cam bleeding off cylinder pressure" It does reduce CCP... all the way up to 3,000 RPM (more or less, depending on too many variables to list, but stops well before the torque peak). After that, it increases cylinder pressure - that what it's for. It doesn't always need 5 seconds to "build heat", the piston damage can occur in 1 second.
And just because you don't hear detonation doesn't mean it isn't happening.
