06-17-2010
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#971
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Transmission destroyer
Join Date: Feb 2007
Location: Cambridge
Drives: G37, 91 TSi
Posts: 7,150
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Re: Evo X upgrades
Quote:
Originally Posted by scheides
As far as running a 4" intake to a 2.5" inlet, it's been done for years with no ill effects. Your lowest pressure point will be in the intake, generating vacuum from the outside air (thus the sucking sound) and then as long as there is a smooth transition from the 4" intake to the 2.5" (?) intake on the turbo, the compressor wheel will do everythign in its power to just suck in and swirl the air as much as it can. As the air approaches the blades though, it will probably be straight.
I had a FP 4" intake on a bastard20g turbo w/ a 2.5" inlet on it, they made a crazy coupler just for DSMs. It was like $35 but it fit perfect and was a pretty smooth transition.
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__________________
Quote:
Originally Posted by scheides
I swing from the nuts of cold hard data. Anything less is a guess.
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