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.
1) SHELL Seksyen 7 - Near the UNISEL
2) PETRONAS Seksyen 13 - Facing stadium with Dunkin Doghnut
3) PETRONAS Federal Hway - From Klang. the one beside Shell
4) SHELL Federal...