Yep. I thought I was going crazy. I've just been playing around with my setup. Each to their own, but if you plumb the vacuum line in before the throttle body, I reckon you going to have issues. The spring adjustment on the bov body is there so you can 'tune' the bov to your setup and vacuum levels. Turbosmart state the same on all thier install guides, and they know shit loads more than me.