I have a black procharger bypass valve, at the begining of summer I put a new bladder in because of "chatter", not enen 3000 miles and its doing it again, is it time to move to the BIG RED im only running 12.5 pounds of boost ????
i run the same bpv, and with the cooler, more dense air it does chatter more... all pro-flow bpv i've heard do chatter but my tuner told me it is "normal".
saying that I am still considering running an open big red race valve.