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Bi turbo whistle

Buxton2901 Apr 26, 2018

  1. Buxton2901

    Buxton2901 Well-Known Member

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    Guys, i have a friend in the car yesterday who asked me what the whistling sound is under acceleration.
    I hadn't noticed it before but do now.

    Does anyone else with a bi turbo have a whistling noise whilst accelerating?

    its not very loud and im hoping it is just normal turbo spool noise or air intake.

    thanks

    Paul
     
    DonkeyIce likes this.
  2. DonkeyIce

    DonkeyIce Member

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    I’ve got a distinctive dual whistle under load not loud but there.
    If you take the air box off you’ll see not only the filter element but what looks like loft insulation, that is what I’ve removed as it would be there to keep induction noise down, you may find it’s already been removed on yours.
     
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  3. Buxton2901

    Buxton2901 Well-Known Member

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    Cheers I'll have a look at that

    Sent from my SM-G930F using Tapatalk
     
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  4. jetty

    jetty Active Member Team V6 Audi A6 Audi Avant Owner Group Black Edition quattro S-line owners group

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    Same here - I only notice it when the windows are down.
     
  5. Buxton2901

    Buxton2901 Well-Known Member

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    Noticed my car only seems to do it when I let off the accelerator!
    Maybe this is boost release?
    Or boost leak

    Sent from my SM-G930F using Tapatalk
     
  6. DonkeyIce

    DonkeyIce Member

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    I think it’s the turbos spooling down, when they’re at max rate you cant hear them only when they slow, that’s my theory anyway


    Sent from my iPhone using Tapatalk
     
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  7. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User Audi A4 Audi Avant Owner Group quattro TDi

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    The Loft insulation is like a fleece covering that stops leaves and large debris from getting stuck in the filter . Doesn't block the filter.
     
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  8. fafa

    fafa Member

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    Mine whistles when accelerating sometimes, I've always assumed it was the turbo doing it's thing.
     
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