Put the BBV back.... unless it was adjusted wrong or faulty it will always let you go full boost as soon as you have less then -2 or -3 psi in the intake side of the blower. Litterally no performance gain from removing it and you WILL lose mpg. Also it puts more stress of the rest of the blowers parts because normally they are just freewheeling 90% of the time but now your forcing them under load 100% of the time.