If you increase the valve pressure (turn in the screw), you increase the valve's resistance to opening at lower vacuum levels, meaning part throttle or at idle but you also increase the occurrence of compressor surge, which is what a BOV is there to prevent in the first place.
Been modding till stage 2 . Semi auto gear box start to clutch slip . And circlip bearing broken need to be fix . What do you guys think ? Semi auto or manual Awd ? Cos price to fix the semi auto gear box are round...