can anyone give me some ideas on why my turbo ony gets 9psi boost? it will go to 8 or 9 psi till about 5500rpm then drop down to 6 or 7 psi.. even if i crank my manual boost control all the way up . what gives??

 

the droping is normal. but you should be able to hit over 10 at some point. your turbo probably needs to be rebuilt.