I hear my car detonating at 23 lbs of boost, if I let off just a little to about 20 lbs it goes away. No signs of knock on SM, PL or audible. New Alky pump, primed and set on 8, Walbro fp is about 6 to 8 months old and will be replacing very soon with Deatschwerks. At about 22 lbs of boost on up it sounds like valves clattering, then let boost go back down to around 20 lbs and clattering goes away. I verified knock sensor about 6 months ago when I installed audible. I've attached a PLer file if anybody is interested.
Thanks
Thanks