[Adger Smith]

Paul,
The water and a few other issues was what I was leading to when talking about tuning with DA. Have you ever run in a tree shrouded track? (does that bring to mind the Temple Tx track for anyone?) Trees make Oxygen... That throws off all the data collected at other tracks without abundant trees. Years ago Bristol was that way. It was an altitude track that was surrounded by trees. I Couldn't tune there. It had altitude, but wasn't responding to an altitude tune. Then Nickens showed me an oxygen meter. It has been many years since I was there, but I think the trees are long gone and it tunes like an altitude track, now.
As for the Detonation, it isn't a clean burn. All sorts of bad happenings in the combustion chamber. Rings knocked loose, oil gets in and is part of the combustion process, ect, ect. How can a sensor read it as a clean burn and tell you what the A/F ratio is. Remember that combustion is a chemical reaction. When Clean combustion takes place the chemicals present are not the same as what is present when there is detonation. (uncontrolled chemical reaction)