Aftercooler Solve Detonation Problems?

[SleeperGT]

Oh man, the hard core questions....I gotta reveal that I'm just an armchair (at best) mechanic. I'll answer the questions that I can first. I always run premium gas (91 Octane). I have put racing fuel in the car and the detonation goes completely away (2 gallons of 103 octane, mixed with half a tank of gas and the detonation goes completely away for about another 3 tank ups of regular 91 octane). I do not have a fuel gauge or boost gauge, however I am going to assume the detonaton only occurs under high boost as it is only under hard accelleration and at the higher rpms (4000 rpms and higher, and typically in 3rd or 4th gears). The first chip I had I know I was running rich because I could smell the unburned fuel and I confirmed this by putting it on a dyno. However that is neither here nor there because I am now running on my second chip so I have a much different program. I still think I am running a bit rich because I can smell unburned fuel (however I know I could be wrong on this). I do not know my fuel pressure or boost levels figures, as I don't have these gauges, I've sunk my money into the motor, rather than gauges, however it defintely sounds like I better make this investment now. I do not know my cars timing settings, however I think I can find this out from my shop. Murdock, if this lets you comment further on my situation please go ahead. Deuce, I'll check out the webpage you gave. Thanks for your input!