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This is a discussion on Could my boost gauge be this incorrect? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Its between 26-30 cm/hg at idle...

  1. #16
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    Its between 26-30 cm/hg at idle

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  3. #17
    Registered User wrx50's Avatar
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    Could my boost gauge be this incorrect?

    Normal

  4. #18
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    Yup thx. Should be able to get my logs done tomorrow

  5. #19
    Registered User wrx50's Avatar
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    Could my boost gauge be this incorrect?

    Good luck

  6. #20
    Moderator Donkey's Avatar
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    Quote Originally Posted by SRivers33 View Post
    Its between 26-30 cm/hg at idle
    Thats not normal. 30 cmHg = 11.8 inHg. Like I said earlier,normal is 18-20 inHG at idle.

    http://autospeed.com/cms/title_Using...3/article.html
    Last edited by Donkey; 02-01-2013 at 05:30 AM.
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  7. #21
    Registered User wrx50's Avatar
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    Could my boost gauge be this incorrect?

    I'm sure he meant in/hg

  8. #22
    Moderator Donkey's Avatar
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    Quote Originally Posted by wrx50 View Post
    I'm sure he meant in/hg
    My guess is his gauge is borked. Using a mechanics vacuum gauge would confirm this. He should see 18-22 inHg at idle.
    Last edited by Donkey; 02-01-2013 at 07:13 AM.
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  9. #23
    Registered User wrx50's Avatar
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    Could my boost gauge be this incorrect?

    Hmmmm. I'll have to look at what my gauge reads. I haven't driven the car since October so I may very well be mistaken

  10. #24
    Registered User wrx50's Avatar
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    Could my boost gauge be this incorrect?

    You are right. My greddy gauge goes as low as 30 in/hg but reads 21 steady now that you say that.

  11. #25
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    OP- Do you have an electronic or mechanical gauge?
    Last edited by Donkey; 02-01-2013 at 07:15 AM.
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  12. #26
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    Could my boost gauge be this incorrect?

    Edited for the sake of keeping this on track
    Last edited by wrx50; 02-01-2013 at 06:01 AM.

  13. #27
    Registered User wrx50's Avatar
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    Could my boost gauge be this incorrect?

    Edited for the sake of keeping this on track
    Last edited by wrx50; 02-01-2013 at 06:01 AM.

  14. #28
    Moderator Donkey's Avatar
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    Also some gauges require a "restrictor" to be in the vacuum line for it to read properly. My Omori electronic boost gauge required one and it had to be a certain distance away from the gauge.
    Last edited by Donkey; 02-01-2013 at 07:18 AM.
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  15. #29
    Registered User wrx50's Avatar
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    Could my boost gauge be this incorrect?

    I'm betting the gauge is wrong as well.
    Last edited by wrx50; 02-01-2013 at 06:04 AM.

  16. #30
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    Re: Could my boost gauge be this incorrect?

    Keep in mind some boost gauges are referencing their zero for sea level conditions. Denver atmospheric pressure is about 3 psi lower than sea level atmospheric pressure.

    Have a bicycle pump with a gauge? That's s quick easy way to do a rough deadweight of your gauge and see if you are in the ball park.

    Sent from my DROID RAZR using Tapatalk 2

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