This sounds more like a problem for a auto garage, but after messing with some of the realism settings for fight 2k4, the WONERFUL YF-23 model makes a LOUD banging noise when over 3 G's. I looked though the sound files, can't find the bangs. Tried moving the realism settings around, it's still there.
Is there a prefs file for aircraft settings that I could kill to cure antics like this?