Just wondering. I am having some part throttle and full throttle detonation at anything over say 12lbs. I've read about people w/ 6-12 of knock retard. Can't you hear detonation at that level? I have a 86 SVo thats made "lots" of quarter mile passes w/ the knock sensor disconnected(too sensative). If i hear any pinging I let up. No head gasket problems,,,yet! I know I need a scan tool for the buick(getting one soon!) so I drive it real easy. FYI, 86 GN w/ 42.5's, 342 pump, red's 93 chip, EP front mount, 62mm throttle boby, TA-49 on 93 octane. No detonation w/ 100 oct unleaded. Any input appreciated.