I have been working on getting my timing dialed and have come up with a good idea. What I want to do is look at the output of the ESC box that goes to the ignition module to see when spark knock (detonation) is detected. If anybody knows which wire(s) to look at and what the voltages mean, please let me know. Otherwise, I'll post back if I come up with anything cool. My thought was that then I can look at a voltmeter or rig up a gauge that shows me knock retard all the time I am driving (if it works, I can leave it in full-time). Then as I set my initial, centrifigal and vacuum advances, I can see with at a glance when I am getting close to detonation. I don't really like trying to listen for the beginnings of knock over my exhaust. I may have to temporarily bypass the ESC box so that the spark knock is indicated for long enough for me to see it before timing is retarded and the condition corrected. Hopefully not, though, because if the timing is advanced too far, the ESC should give retard for as long as the load on the engine remains the same. From what I understand the ESC output is not "on/off", but gives some variation in the amount of knock detected. Any more info anybody has on this system would be appreciated.