My boost max out at 1.35bar(19.5psi) with the boost control knob turned all the way to max position. Is it the limited of the stock turbo or is there something wrong with my car?

 

Did you buy pass the factory sylinoid and cap it off?

 

I did bypass the factory solenoid.
Should I try different spring in the Forge BOV?

 

what ebc are you using, i know the g-reddy BspecII sucks at holding boost

 

My next question is how do you have the wastegate hooked up. Is it hooked up on the release side from the EBC sylinoid? Or is it hooked up on a T line to the input side of the EBC sylinoid? If it is hooked up on the line in side you could be loosing pressure the entire time since it flaps up at about 11psi. This would be the next question I ask so if this isn't it I would say that the EBC sylinoid is running the correct duty due to it being bad or still hooked up incorrectly.

 

I am using a HKS EVC EZii, it simply has a power switch, knob A and knob B.
I am not too sure how it is setup, will check again later.