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Thread: Exhaust Manifold for 1.8 VVT

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    Regular Member Gray16v's Avatar
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    Default Exhaust Manifold for 1.8 VVT

    Ok, now the \Vectra has been remapped and rolling roaded, the only possible thing I would think of changing is the exhaust manifold. Has anyone got any experience of doing this change ?

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    Regular Member Rebellion8878's Avatar
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    Just out of interest what increase did you get off the remap thinking of doing it myself and did you notice any difference in mpg?

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    Regular Member Gray16v's Avatar
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    Car was 140.9bhp standard 165.6bhp remapped, it supposed to improve the fuel efficiency, but its early days yet. It definetly drives better and feels a lot more responsive. They did say that after a while the car should achieve 170 bhp
    Last edited by Gray16v; 23rd December 2009 at 22:39.

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    Full Member Big Sig's Avatar
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    Inlet manifold??
    Now I need a turbo to keep up!

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    Regular Member Gray16v's Avatar
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    Quote Originally Posted by Big Sig View Post
    Inlet manifold??
    Nope, exhaust

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    Full Member Big Sig's Avatar
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    Sorry, I was suggesting to have a look at that next.
    Now I need a turbo to keep up!

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    Regular Member Gray16v's Avatar
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    Quote Originally Posted by Big Sig View Post
    Sorry, I was suggesting to have a look at that next.
    oh, see your point sorry.

    Its trying to eliminate the restrictions of the engine, do you think the inlet will be a restriction ?

    I guess the exhaust manifold & cat if they are changed the car should improve by a further 8 to 12 hp in theory.

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    Regular Member vxr-i-wish's Avatar
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    Where did you get it remapped and how much was it?

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    Regular Member mark_647's Avatar
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    I posted a similar response earlier, in the total VX mag, theres a page for Dbilas and they say an inlet manifold on a 1.8 can increase it by 32bhp !

    Not sure myself, but thats what it says, take a look. (But its a rediculous price)

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    Regular Member Gray16v's Avatar
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    Quote Originally Posted by vxr-i-wish View Post
    Where did you get it remapped and how much was it?
    midpoint garage middlewich (j18 m6) £350

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