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 was in another forum (evolutionm.net) and i came across this topic where a guy is selling his evo and upgrading to a M5. its his money so he has every right to buy whatever car he wants but he insulted the evo...
hi all....i just bought a second hand mit evo 6 rs2 models...as what i'm get the information from the ex owner the car is australia spec n original come with 3,4,5 close ratio gear box,titanium turbo but i 'm not so...