I have never heard detonation with my ears. There should be a thread that i wrote in the tech essay section showing how to make det cans but you need gold member acess to see it.

Looking at that table and asumming you are taking the ECU timing marks from the stock flywheel so they must be correct, I would say you need to back off some of that advance.

The fueling problem you have sounds like your accel fueling rather than the main map figures. Sometimes it is easier to disable accel fueling whilst mapping your normal map sites so there is no confusion as to where your fuel is coming from. Then when you have the map istes spot on start with hte accel. The LC1 should be fast enough reacting for you to see if she goes lean when you boot it and by how far. Then dial a little fuel in until the lean spike dissapears. I find you can get the accel fuelling pretty good by feel if you experiment with it. This is always easier if you have someone else to map with as you can do quick chages and back to back comparrisons.