i have a 91 gsx w/ small 16g, running thru 2.5" pipes to 26x6.5x3.5 fmic, 560cc injectors, walbro 255, brand new BPR7ES ngk plugs(gone thru 3 sets just to be sure) gapped to .028, brand new ngk plug wires, changed coil packs also, i have a safc2 and egt, at 15-16psi ive done runs on this car and monitored on datalogger, and the knocks will not stop, we've run my safc2 thru 30% of the range of the fuel curve, adjusting by 1% per run, and its either its running so rich that it breaks up, or too lean and pegs the egt fast as hell, right now its at a happy medium, doesnt break up and runs good air/fuel but still knocking like crazy, any ideas on what to begin knocking out to try to fix the problem? btw ive heard that the egt can lie a bit, that if the car retards the timing too far, combustion will actually escape the exhaust valve and make the egt think its hotter than it is? dunno if thats accurate or not