i have recently had my turbo rebuilt and when i fitted it bk to the car it has lost 10psi of boost pressure.
aswell as having the turbo rebuilt i had all the valves reground etc. the full top end rebuilt really, but i cant see where i have gone wrong to lose the pressure.

there is one thing i have replaced and that is the intercooler. i have fitted a PACE rs500 intercooler instead of the standard 4x4 item. could this be the reason of the drop in boost pressure????