So i installed a manual boost gauge from TurboSmart in the vent. For the vacuum source i use the nipple on the manifold right behind the throttle body so its a direct source, no restrictions or pcv valves to mess with things. Took it for a drive and it has the flutter a little bit and seems to have a lot of vacuum vs the readings on my x4 tuner. The gauge works fine and it reads according to the BOV (i have windows down and hear the bov and watch gauge and boost comes in/out with the bov). Is it normal for boost to spile to 15lbs then back to 12lbs under wot and vacuum at idle show 16-20 vs the x4 reads 6-8. kinda lost here with so many variables.