One guess I can make about that is the AVC-R. That was the first time it had seen that boost target and didn't really have much of a chance to learn. It climbed steadily to about 16.5 then choked off until about 4500 rpm where it seemed to settle in. Now on the street its had a chance to learn or whatever the hell it does and it hits the target boost better / sooner. I don't think AVC-Rs and dynos go well together. Anything it learns on the street goes out the window when you climb on the dyno, the loads change and vice versa. Kind of frustrating that way.