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Thread: Tubular manifold with Garrett GT28RS but only 300bhp

  
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    Patrick's Avatar
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    Tubular manifold with Garrett GT28RS but only 300bhp

    If you only wanted to run say 300-310bhp on a z20leh (so still with standard internals) and you were to fit an equal length tubular manifold with the Garrett GT28RS would you be able to achieve this running low boost on the turbo or would you have to whack the boost up higher than if you were achieving say 290 on the VXR turbo?
    - 2004 Vauxhall Zafira GSi - Silver, work in progress..
    - 2003 BMW 325ti M Sport - Silver, 18" CSL wheels in matt anthracite, Eibachs, Full red leather

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    Regals are now running 340bhp on standard LEH internals with low boost No garrett in site either.

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    What map and turbo are they using
    Astra van gt3076

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    EDS and Hyrbid KKK

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