Turbo symptom

[luckynumberseven]

The turbo system goes into twin mode when you pass the transition point (about 4500 rpm at WOT, later for partial throttle). It does not return to single mode until you go below 3000 rpm. So, if you go past the transition and then coast down to 3100 rpm or so and floor it again, it will be a little slow building boost because both turbos are still on-line. It is supposed to work that way.
This was gleaned from a page i was reading when trying to figure out wha was wrong with my engine my turbo acts like this i wondered if it can be adjusted out.