[k3smostwanted]

yeah, basically what you guys are calling a closed-loop BOV is a recirculation valve which is the best kind of BOV because it doesnt waste good air that the motor has already pressurized. but then that pshhh...sound isnt quite as noticeable if you can hear it at all. most turbocharged cars come with a form of recirculation BOV of some sort stock.

the problem stated above about with the BOV "blowing off" while accelerating, it sounds like the BOV wasnt able to keep the air pressurized long enough...whether it was a spring type BOV that the spring was not strong/stiff enough. either way it soudns like the BOV isnt rated at the amount of boost he was running.