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Thread: Blocking the EGR Valve

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  1. 30th April 2011, 08:33 PM #11
    the evil twin
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    What butterfly valve?

    How are you measuring boost pressure ?... off the Scangauge MAP?

    If you back off the Trubo boost pressure back to max 16 PSI you will gain about 1.5 to maybe 2 litres per hundred better fuel economy (higher boost = more fuel)

    The reason the vehicle feels more responsive is that the spool up of the Turbo is now much quicker and the pressure is higher which may (I stress only may) give you problems with boost spikes. Up to you if you wish to crank back on teh VNT screw or fit a Dawes and Needle valve. I would do one or the other.
    Last edited by the evil twin; 30th April 2011 at 08:36 PM.
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