are you reffering to what i wrote?
EDIT: Its only logical that when you unscrew it, it runs more boost, pressure is escaping causing the wastegate actuator to stay closed until it creates enough boost to actually open it... same sort of principal as ripping the hose off the wastegate.. except you'll get infinite boost so to speak
so umm... not sure if its the same with this boost controller but a bleed valve is a bleed valve... thats how they work