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Thread: VNT Turbo Setup??

  1. #101
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    [quote=85 county;1885088]
    Quote Originally Posted by 1103.9TDI View Post

    Nope you are talking about something else, where you are correct in saying you are talking about lift.

    I wrote about parasitic drag. similar but the application. different in the terms of reference. The same in application. if that makes sense.
    Sorry, that does not make any sense.

  2. #102
    slug_burner is offline TopicToaster Gold Subscriber
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    Guys, take it to thread on drag or aerodynamics. I would rather we get back to VNT tuning.

  3. #103
    85 county is offline AULRO Holiday Reward Points Winner!
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    ok if it takes 20KG of force to move the wing though the air to generate 15KG of lift then there must be 5kg of drag.

    what has this got to do with VNT turbos, well quite a lot.

    a std turbo translates LIFT into rotation. same thing difrent aplication.

    A VNT turbo can modify its lift from a lot to little.

    so low lift = low drag, therrefore needs high speed ( gas) to make rotation

    so high lift= high drag, therefore for the same rotation it needs slower
    speed ( GAS)

    sa gas speed increases so will rotation untill and at some point more drag is being produced than rotation.

    VNT can change the angle of atack of its wing to reduce lift and drag. but since drag is reduced gas speed in incresed compensating for the loss of lift.

  4. #104
    slug_burner is offline TopicToaster Gold Subscriber
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    Are we off wings and back onto VNT tuning yet?

    Things are a bit quiet on the Irish front, still in recovery from 17 Mar!

  5. #105
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    Yeah, I'm hoping Mike is far far away from a computer enjoying himself
    Hercules: 1986 110 Isuzu 3.9 (4BD1-T)
    Brutus: 1969 109 ExMil 2a FFT (loved and lost)

  6. #106
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    Quote Originally Posted by flagg View Post
    Yeah, I'm hoping Mike is far far away from a computer enjoying himself
    I'm not, he owes me some cash

  7. #107
    85 county is offline AULRO Holiday Reward Points Winner!
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    Quote Originally Posted by slug_burner View Post
    Are we off wings and back onto VNT tuning yet?

    Things are a bit quiet on the Irish front, still in recovery from 17 Mar!
    what do you think are inside a VNT turbo. Hamsters??

  8. #108
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    Quote Originally Posted by 85 county View Post
    what do you think are inside a VNT turbo. Hamsters??
    Vanes, not wings. They are there to direct flow (create more/less swirl), not create lift.

  9. #109
    slug_burner is offline TopicToaster Gold Subscriber
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    Quote Originally Posted by 85 county View Post
    what do you think are inside a VNT turbo. Hamsters??
    BBQ hamsters??

    I think there is a turbine and some vanes to direct flow or as Bush 65 says, to reduce the cross sectional area to increase pressure and heat. The turbine takes energy from the gas flow, transmits it via a spindle/shaft to the compressor.

    Some magic occurs and then you replace the hamsters and you're ready to go again.

  10. #110
    85 county is offline AULRO Holiday Reward Points Winner!
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    and is not a cross secton of a vane looking a bit like a wing?

    and ar these vanes not acting like a wing attached to a wheel, thus lift is translated to rotation??

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