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    Thread: SAI diverter valve??

    1. Member jedge1.8t's Avatar
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      Jan 27th, 2012
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      04-10-2012 04:48 AM #1
      may be stupid but just an idea i had. your sai as i know pumps extra air into your exhaust side of your cylinder head... extra air to heat up the catalyst.

      SO lets say with a SAI delete. could you then revert back pressure to your SAI ports.

      in my mind this would result in keeping the turbo spooled slightly better on quick shifts rather than reverting it to the intake.

      or maybe the colder air would be bad to expose to the turbine wheel and this is just stupid

    2. Senior Member 87vr6's Avatar
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      04-10-2012 04:58 AM #2
      During a shift, you lift off throttle, thereby making the ECU drop the requested boost to nil, opening the wastegate, and causing the DV to operate (at least I think that's how it works), so, even if you were to pump the pressurized air through the SAI port, it would just go around the turbine, rather than spooling. Novel idea, but I don't think this is something that should be really pursued. Not to mention that port is quite small in relation to an actual turbo housing, etc...

    3. Moderator groggory's Avatar
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      2002 VW GTI 1.8 BT
      04-10-2012 05:07 AM #3
      Forget this idea and instead look up wot shifting
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