Alright, so i know the psi goes 10-8-10 but when exactly does the transition happen? I'm also under the impression that the turbos spool together for at least a small period of time. Thanks a lot guys...I just want to know exactly whats going on with my car.

 

At about 4500 rpms it'll dip down to 8 and should go back up to 10 right after. Only one turbo runs until the transition. Try searching around...
http://robrobinette.com/notes_engine.htm#Boost%20Test

-Alex

 

The turbos don't spool 'together', but while the primary is working alone, and the rpm starts approaching 4500, the secondary prespools. But during prespool the secondary's output gets dumped - not what I consider 'spooling together'.

Dave