from a dead stop if i go wot i get about 9 psi . when i get to about 4000rpms the boost starts droping at 6000 im at 4psi , car is stock has a aftermarket blow off valve , put another turbo on it 2 days ago it had no boost before . but i dont no if i need to reset anything or what . anyone know what this is??

 

Stock K03 turbo is small and the boost falls off in the upper half of the rev range. You can get some info on this in the B5 A4 section, sticky FAQ post up top.

And lose the sneeze valve unless you like the idea of rich spikes causing carbon clogging of your cat.

 

9 peak 4 stable is about right