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.
Any1 interested?!?!?! We can do it once a week during weekdays at night......if we get enuf ppl then we can start....the fees is around RM50/month in USJ 21 new badminton courts....heard it is a big 1 with around 20...