what i'm experiencing is an oscillation, say at 1.6BAR hold, it is actually fluctuating from 1.4-1.6BAR back and forth throughout the revs.
most peculiar, didn't do this on the last turbo, but changing to the gt3071r has started this, i may have a cam swinging session to see if that is an issue, then move onto the wategate springs possibly not sitting right with each other and go back down to one spring again.
my head is an area six one with porting to exhaust side and uprated cams.