boost problem....
 

well i made this by accident, but here goes.
what kind of pressure drop should i be seeing between the turbo's and the intake manifold? i was having a problem with my boost falling off at high rpm (its about 80%fixed). i put my boost gauge on the turbos (there is a nipple) and i'm seeing an almost 4psi difference between the turbos, and after the throttle. is this too much?

mike