hi ppl im havin alot of trouble with my00 impreza only boosting to 0.4 bar . ive changed the following
turbo
exhaust
actuator
new vac pipes
knock sensor
air flow meter
but no change from doing any of it . does any now of anywhere around bridgwater i can take it to get it sorted and remaped as ive already spent alot trying to sort it my self .
thanks kev

 

When you changed the boost control piping from the turbo outlet via the t-piece to the actuator did you take the brass restrictor pill out of the old pipe and put it in the new one. Without the restrictor the turbo boost pressure will act directly on the actuator which is set to begin opening the wastegate at 6-7psi (about 0.5bar) and therefore you will only ever get 0.5 bar of boost.
Kevin