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.
i just wanted to improved my altezza power...so what shud i do other than add turbo ? i dun want to add turbo 1st...
1 of my fren told me that pasang haltech engine management to improve hp..isit ok ? currently my...