A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

manual boost controller

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Old Jul 26, 2004 | 11:26 AM
  #1  
streetdreams's Avatar
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Default manual boost controller

i installed an mbc by putting t fittings on to the wastegate and from the turbo houseng to each side of the boost controller the way i was told to. no increase or change. can someone pleae tell me where to install it
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Old Jul 26, 2004 | 11:34 AM
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ralley's Avatar
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Default what do you mean no increase or change?

You should just bypass the n75 valve and it should work fine. What turbo are you using, stock?
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Old Jul 26, 2004 | 11:44 AM
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Default Sounds like you just made a bridge between the 2 lines but

left the stock lines still going to the N75. This will not work since the N75 valve will open and let all the pressure out of the line coming from the turbo housing line. The way you installed it is not right.
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Old Jul 26, 2004 | 12:47 PM
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Default Re: what do you mean no increase or change?

i got it i by-passed the n75 and boom 15 psi. runs strong and no lean problems.
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