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.
*WTS:Nissan Silvia 180SX-Type S (KRS13)-rare model*
SPEC LIST
-SR20DET
-Type S KRS13
-S14 Turbo
-Apexi Exhaust Manifold
-Apexi Tomei Cam
-Cusco Engine Bar
-Cusco Oil Tank
-Pivot Volt Stabilizer
-Sard Fuel...