Any suggestions here? Boost is a few hundred RPM delayed, spikes, then dips, followed by a slow rise back up to normal just before I need to shift. Here's an example, green is target boost, yellow is actual:
I've tried adjusting the VNT rod out longer to about 20 in-mg, and also to the factory spec of 18.5 in-mg, but it doesn't seem to affect it any, not even the intensity of the spikes.
Lots has been done on this car to get it running right already:
New MAF
New N75
All new vacuum lines
New air filter
Cleaned snow screen
New VNT actuator (moves freely)
Clean EGR/intake manifold
Adjusted injection timing to optimum slight advance

I've tried adjusting the VNT rod out longer to about 20 in-mg, and also to the factory spec of 18.5 in-mg, but it doesn't seem to affect it any, not even the intensity of the spikes.
Lots has been done on this car to get it running right already:
New MAF
New N75
All new vacuum lines
New air filter
Cleaned snow screen
New VNT actuator (moves freely)
Clean EGR/intake manifold
Adjusted injection timing to optimum slight advance