I had a mate not use a one way valve and busted his booster. But when using a BOV as soon as you take your foot off the throttle shouldn't the Positive pressure be vented?? Is there any positive pressure after the BOV has gone off?? Then it should go into vacumm even is the turbo is spooling down causing slight boost your booster should be working??? am I right with any of this or am I talking out my arse??
Cheers
Damo