Well I’m still having compressor surge after the new tial q-bov install. I’m not sure if it's because of the vacuum line or the spring rate. It opens fine when I put it in park rev the engine and chop the throttle. As soon as I get on it and take it to 1bar and chop the throttle it surges. My vacuum is coming right off the manifold and I’m starting to think the line is too small. I had also cut the spring 2 coils because I had gotten the 11psi spring. My turbo is a sp74gtq w/o a anti surge housing, so it is barking the turbo a bit and I want this turbo to last me.