Quote:
Originally Posted by PongSanity
Stupid question time: on the turbocharger, the vacuum port on the charge side. Is it utilized? Why not use that as the vacuum source for the wastegate? It's a closer run than to the UIM.
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The reason for this is that you would have lower IM pressure. There is always a pressure drop across the system (piping and intercooler), and by taking the lines to the compressor cover, (for example) a 9psi spring may yield only 7psi at the manifold.
Since wastegates don't need vacuum and only operate by pressure, the absolute best source for the pressure is just before the TB...which is where the nipple is located on each one of these kits.