So I’m looking for a little brainstorm from the community. I have a X47r setup with all accompanying mods. My problem is for the first couple pulls after the car first gets to operating temperature I can hit and hold 27.5psi but after that it falls to 24.5-25psi.I have replaced the wastegate actuator and all intercooler piping,coupler and clamps and the problem still persists. I know this is a new problem cause it didn’t do this while tuning on 92oct and changed when I went to my e30 tuning but the problems is there no matter what has I am on. There is also a slight whistle I hear when I just start to come out of vacuum into boost that I didn’t notice before. I have had the car boost leak tested and could find any problems there.