Quote:
Originally Posted by JordanInnovations
You guys should know it's not a like a turbo BOV, which has to seal and open at certain times in order to protect the compressor ~ since the blower's compressor speed doesn't drop as fast as a turbo (tied to RPM's) you never get the surge like you would on a turbo.
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Both the bypass valve and this blowoff valve are open and venting until you give enough throttle for the manifold to see zero/positive pressure, in which case it is closed and you begin to see positive pressure
A blowoff valve like the greddy type-RS would work in the same fashion as it is simply a push type valve. An HKS style SSQV would not work properly as it is a pull type, and it would likely be sealed at idle/cruise and cause issues as it will not let the excess air bleed off.
I would not say that you never get compressor surge with a centrifugal, in fact I would say its very easy to get surge... just remove the bypass valve. Of course, don't do that....