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how do you know if n75 valve is nackered

Discussion in 'A3/S3 Forum (8L Chassis)' started by mk1kid, Jun 10, 2010.

  1. mk1kid
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    mk1kid Member

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    [Jun 10, 2010]
    hi lads just trying to work out why im only getting 0.4 boost checked for boost leaks etc just thinking is my n75 valve faulty?
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  2. jamesa3t
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    jamesa3t Member

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    [Jun 10, 2010]
    vagcom buddy thats how i did when it got remaped
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  3. mk1kid
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    mk1kid Member

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    [Jun 10, 2010]
    i have vagcom and a ebay lead ive checked for dtcs but nothing?
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  4. Prawn
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    Prawn My other car is a MINI!!!!

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    [Jun 10, 2010]
    0.4bar boost is 5.9psi, which doesn't sound like a problem to me at all.....

    a standard 150bhp AGU engine will only boost to around 6psi as standard anyway, and if you've got a cheap guage it's more than likely it'll over/under read by 1psi or more.....

    why do you assume that 0.4bar boost indicates a problem?
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  5. mk1kid
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    mk1kid Member

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    [Jun 10, 2010]
    just drove some cars around same bhp and seem alot quicker i just wondered if the n75 was faulty but dnt think so now reading prawns comment thanks m8
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  6. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Jun 10, 2010]
    What cars did you drive?

    The A3 is quite heavy for it's size @ 1200KG, if say you drove an ST fiesta @ 150BHP it prob weighs 1050kg tops in comparison so power to weight would make quite a difference
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  7. mk1kid
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    mk1kid Member

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    [Jun 10, 2010]
    true lol
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