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Reading That Vacuum Gauge

Discussion in 'Early CJ5 and CJ6 Tech' started by jwmckenzie, Nov 24, 2018.

  1. Nov 24, 2018
    jwmckenzie

    jwmckenzie Sponsor

    Boston, MA
    Joined:
    Mar 16, 2012
    Messages:
    570
    Found this diagram on the Vintage Ford Forum. Using a Vacuum gauge to fine tune the timing and carb's on my Dauntless got her running very well. This chart would have helped.

    [​IMG]
     
    Beach66Bum and homersdog like this.
  2. Nov 24, 2018
    TIm E

    TIm E Aggressively average

    NW Arkansas
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    Mar 2, 2017
    Messages:
    683
    Useful chart, maybe good shop wall "art". Always found it interesting how much you can determine from a vacuum gauge.
     
  3. Nov 24, 2018
    Dave Deyton

    Dave Deyton Member

    Fuquay-Varina, NC
    Joined:
    Oct 12, 2003
    Messages:
    860
    At the Southeast Willys Reunion, Rick G, (Scout Pilot) did a class on tuning up the Willys engine.
    He usde the dwell meter and the vaccuum guage to set the idle and tune the engine.

    Dave
     
  4. Nov 24, 2018
    mortten

    mortten I can’t put my finger on it 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Peninsula, Ohio
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    Apr 17, 2006
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    I have that very chart laminated and hanging in the garage.
     
    Tom_Hartz, timgr and Bowbender like this.
  5. Nov 24, 2018
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Aug 10, 2003
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    If you search, you can find several versions of that chart online.

    autospeed vacuum gauge chart - Bing images

    If you find one that you like, you could print it and keep for reference as suggested by Doug. Your local FedEx(Kinkos)/Staples/CopyCop can print it larger and laminate if you want a nifty poster for your garage.
     
    Last edited: Nov 24, 2018
  6. Nov 24, 2018
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Aug 3, 2003
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    I'm always impressed with what a great tool a vacuum gauge is for so little money - and how few people use one.
     
  7. Nov 24, 2018
    Dave Deyton

    Dave Deyton Member

    Fuquay-Varina, NC
    Joined:
    Oct 12, 2003
    Messages:
    860
    I have the old Penske set from Sears. Vaccuum guage fuel pressure guage, dwell meter, compression guage, and timing light.
    Need to study up on vaccuum guage readings and use it more.

    Dave
     
  8. Nov 24, 2018
    Tom_Hartz

    Tom_Hartz Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    North Carolina
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    Apr 9, 2014
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    Works good unless you have a cam with a bunch of lift and duration like my V6. But it runs and sounds good.
     
    Rich M. likes this.
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