weren't you worried about your engine at that boost level ? I read recently on the forum, I think it was posted by one of the knowledgeable forum vendors (I can't find the post now), that even if you don't have audible detonation, it does not mean that you are not knocking ! he mentioned using some kind of a device to listen directly to any engine knock.
Al "Kelly turn the car on."
Bud "Maybe you should tell her to use the key before she starts rubbing the car"
Al "Bud, your sister isn't that dumb. Pumpkin use the key."