Actually,

Experience has already shown us that running leaner at high levels does NOT make more power. It is very close. Accepted practice is to run in the 11.x range. Turbo cars make lots of heat. They need lots of cooling. Go ask any high hp car (single turbo Supra for example) what a/f they tune for. Also remember that load on a dyno does not equal load on the street. It will run leaner in real world conditions. Armond is not making shit up. He has been there done that. Oh, and yes, as you mentioned, the fuel is used to help cool down the engine.

I stayed quiet because I think the writeup already made on www.armond30.com explaining detonation already says enough.

Good thread.