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 noticing that there's a lot of Skylines on the road that are having dark/tinted/privacy glass... was wondering, any issues u guys have with authorities, especially with JPJ?