8F code mask, 3900 V6, 60 lb/hr injectors, 11:1 compression, T67, Northstar throttlebody. I'm just about ready to take the car to the track for a quarter run except for the problem in the snapshot below.

Aggressive acceleration attempts are hampered by an extreme lean, rich swing at launch and not so much at speed. The brief lean tip in does not seem to be problematic but the rich bottom out causes a severe stumble that ruins the launch.

I'm not quite sure the TPS% vs AE is the problem solver, I've adjusted it some but so far haven't seen a trend suggesting it holds the solution. A less aggressive throttle input initially followed by full throttle does fine. There's still a dip but not off the scale or out of good AFR range.

Appreciate any suggestions that might work. The area i'm in (the entire state of GA) is too risky to test out on the roads, cops are everywhere (just like in the commercial) especially the seemingly desolate areas.

Note just behind the marker line the AFR has dropped off the screen and is just climbing back up in range at the intersection of the marker.