I have a K04 from the LNF installed on my L61. I am running a standalone ECU. I am using the wastegate without the controller, just the 7psi mechanical opening. I am using the BPV without the computer control, running vacuum right off the manifold.

I am experiencing a case where I have compressor surge at a part throttle condition. At roughly 25% throttle, 2500 RPM, 5 psi of boost I am getting compressor surge. I understand this is most likely because the throttle is open so little.

What can I do to eliminate this surge?