AS I SAID, some credit?
*Hears tapping noise* 'Oop, *stops* 'Is that the engine? *Revs engine* 'Nope, not the engine'
Sorry to keep this old thread going, but I've got to point out that if you're getting detonation under low-load situations (I.E. free-revving), something is beyond wrong with the engine, and under higher load, will be sending flames, rings, and piston crowns out the back.
In other words, you won't be hearing detonation free-revving. So no, no credit for you.