Hey guys would just like someone to confirm for me, I have a atmosphere venting bov, from what I've read up on it the screw on top of the bov adjusts how firm the valve spring is, the tighter it is the harder for air to vent, when boost isn't high enough air vents through the turbo which creates the fluttering sound which isn't good for your turbos life, when boost is higher it vents from bov and u get normal ppsshh sound, so looser screw equals less flutter and better for turbo, tighter equals more flutter, also I seem to get boost restricted with screw done tighter? Does this mean it is over tightened? Thanks for any help, I realise there are threads on similiar topics but everyone always talks about these things as if u already know what they are talking about so for a noob it's hard to follow....