Well i just installed a S5 turbo in my S4. After the car smoking like a sob i was hoping it was the turbo and it was, now i dont have smoke and also no boost (well very little). with the boost controler turned all the way up i can only get 9 or 10 psi. I have a full open exhaust and intake, FMIC, and more. Only thing i can think of is the gasket i installed from the manifold to turbo was completly crap, but it doesent sould like i have a leak there. Any idea's?

 

Check to see that you capped off the nipple on the s5 compressor housing. There is a third nipple, as opposed to 2 on the s4 cars. IF it were left open it'd be a vacuum/boost leak.