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polizei polizei is offline
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Join Date: May 2007
Location: Collegeville, PA
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Originally Posted by RarlyL8 View Post
We just finished a custom T4 setup and I set it next to a standard T3 to emphasize the difference. Both of these flanges shown are split plenum. You can see how much larger the T4 is and how sizing will affect velocity and flow. You need a pretty high output engine to properly utilize the T4 flange.
Hi Brian, I'm not trying to be a pioneer, here. Tony (YermanCars) worked with AMS to do his Carrera turbo conversion a few years ago, and he was laying down more than 500 rwhp with the headers and turbo (T4) provided by AMS. What concern would you have with a T4 as opposed to a T3? I suppose the pressure would less with a T4, causing the spool time to be pushed farther up the RPMs. But then again, he's recommending a .68 A/R turbine housing, which is a bit smaller than the .82 A/R housings that a lot of folks run on their p-cars.

I'm curious to hear your thoughts. I'll ask Tony when he reached full boost.
Andy - 1987 911 Carrera Coupe
Old 11-02-2010, 05:21 AM
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