Thread: Missing Boost
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Old 08-09-2013, 06:14 PM   #27 (permalink)
luigi90210
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Quote:
Originally Posted by Sh0velMan View Post
It's the same. The key you're missing is after the boost as been released on a turbo setup, generally there is no more boost being generated and the valve closes. The valve is "tuned" so that it requires a certain pressure differential between the manifold and the cold pipe in order for it to open. This is controlled by adjusting spring pressure inside the valve.

With the supercharger, boost is continuing to be generated at idle, so that differential is such that it holds the valve open slightly to release that pressure back to the pre-S/C pipe.

Get it?
OK I think that really cleared things up, since the supercharger is always creating boost, you want the valve open at idle because if it isn't, you will run into problems.
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