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.
Yeah, a bit late but we should congratulate Alvin on his second round in his MR2 in GRA and already having a good position in the Open class amongst the other 4 wheel driven monsters which have plenty of grip on wet...
guys...i have few pieces of spended metal grill...
those like diamond shape which they diy on the bumper o grill 1...
material is GI galvaniz...wont rust....
its 4 feet by 1 feet...enuf 4 most bumper...
did 4 my...