Anybody using one of these on a 2.1l zvh turbo? I have one fitted to mine but im having difficulty getting it to boost over 10 psi. It gradually went up to 12 psi as the revs went towards the limiter. I have no crackes in the exhaust housing for thewre to be a leak and i have fitted a new garrett -31.

i have put a half hole preload on the actuator and tired bleeding it off using a ball and spring type bleed valve but to no avail. Could the turbo be the wrong size for my engine and could there simply be not enough preload on the actuator? The engine has stage 3 big valve head, PE cam, meagsquirt forge pistons ect.