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Thread: Vacuum at idle

  1. #11
    VXR enough R34nel's Avatar
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    I see, defo doesn’t sound right then
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  2. #12
    VXRed
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    Mine sits at -23 at idle, my gauge measures the negative pressure in in hg though. Works out at about -12 psi if you convert it

  3. #13
    VXR enough R34nel's Avatar
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    Quote Originally Posted by DanMc View Post
    Mine sits at -23 at idle, my gauge measures the negative pressure in in hg though. Works out at about -12 psi if you convert it
    That’s interesting, that’s what I was lead to believe it should be but Adams reading had me concerned.
    Now I don’t know what to think!
    Thanks for the reply mate.

    Adam do you think it’s possible your negative readings are the same? I just can’t see how I could have such a large leak but still see 10-12 psi on boost (stock map)
    audi S3 stage 2+ Gone
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  4. #14
    VXR Adam"san" w20adm's Avatar
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    No mate definitely not. I guess my car is the only one running properly
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  5. #15
    VXR Adam"san" w20adm's Avatar
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    Btw is this idle warmed up or idle from cold on increased idle? ....
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  6. #16
    VXR enough R34nel's Avatar
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  7. #17
    VXR Adam"san" w20adm's Avatar
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    Told ya -20 was right
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  8. #18
    VXR enough R34nel's Avatar
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    Did you read it all?
    Andy was saying that -20 psi isn’t possible due to some science I didn’t understand and if a guage reads that it’s measuring in Hg, a guage which reads minus in psi will show -10 which is what mine is reading
    audi S3 stage 2+ Gone
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  9. #19
    VXR enough R34nel's Avatar
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    He said the max vacuum is -14.7 psi, the max I see on mine is 14 although it only reads whole numbers
    audi S3 stage 2+ Gone
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  10. #20
    VXR Adam"san" w20adm's Avatar
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    Sorry forgot to say my minus is in hg. It should all be hg. There's no such thing as minus psi pressure
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