My Turbo XS acted something like yours initially, but not quite as bad. Mine was releasing the pressure at about 11-12 psi. I started adding the shims it came with, a couple at a time, and kept testing it until it held the pressure under my boost levels. Ultimately, I used all the shims that came with it, plus a few of my own. It's worked very well since then, and sounds great between shifts.stoney wilson said:my bov releases pressure at around 10 psi no matter how much i adjust it. it is a turbo xs bov and it says it is good from 6 to 30 psi. can someone help?