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hello , need help with the mbc and n75 thingy

Discussion in 'A4/S4 forum(B5 Chassis)' started by carbonaudi, Nov 15, 2010.

  1. carbonaudi
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    carbonaudi New Member

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    [Nov 15, 2010]
    right , what boost do the b5 aeb 1,8 150 run? i m getting a peak of 0.7 and wen i installed a mbc without the n75 got 0.9 but started cutting out about 14psi .:think:.apart from a remap can u get the boost to a bar without bogging down? cheers erm anyone with a diagram of a mbc installation? cheers all
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  3. carbonaudi
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    carbonaudi New Member

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    [Nov 15, 2010]
    oh any prob with removing the cat after the turbo? cheers
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  4. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Nov 15, 2010]
    You need a remap to tune the engine. Put the MBC back in the garage and do it properly before you blow it up.

    No problems with removing the cat.
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  5. carbonaudi
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    carbonaudi New Member

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    [Nov 15, 2010]
    aha thanks for that ..only thing i noticed it runs alo betterwithout the valve for some reason
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  6. Oranoco
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    Oranoco Well-Known Member

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    [Nov 15, 2010]
    Do not fit a MBC to your engine. Without the fueling to match the increase in boost the motor will run lean and will fail in an expensive style.

    I managed to lunch my engine even though it had been set up properly after a minor fuel issue caused this in my track car.

    [​IMG]

    That cost me a good couple of grand to sort :(
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