I have a few questions the bypass valves seem to be hurting the low end on the pd blowers. The dyno charts I have seen make it seem that the turbo may even be better for wheeling than the roots and that blows my mind. ( dyno charts and real world =2 different things) I get that vacuum controls the valve but how? I would want a roots because I want off idle torque but the bypass valve seems to be killing that. what kind of boost are you seeing while crawling at low rpms and little throttle? if you disconnect and plug the vacuum line does the valve say open or closed?
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