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Thread: AFR gauge for Dominator on methanol?

  1. #1

    Default AFR gauge for Dominator on methanol?

    Up until now, I've been using the 553-100 Universal EFI gauge for displaying my AFR. The gauge seems to have broken and they aren't available anymore. What's everyone out there using for a AFR gauge on methanol?

  2. #2
    Join Date
    Dec 2009


    Quote Originally Posted by Boostedtruck View Post
    What's everyone out there using for a AFR gauge on methanol?
    The newer Holley Analog Style EFI Gauges only display down to 8.5 or 10 AFR, so that's no good for methanol.
    You can use the 3.5" TSLCD or 7" Digital Dash to display the Dominator EFI Air/Fuel Ratio.
    You can even program one screen dedicated for just an Air/Fuel Ratio gauge, if you want.
    May God's grace bless you in the Lord Jesus Christ.
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  3. #3


    You can use a Gasoline AFR gauge by knowing how to convert the numbers like this:
    Basically, methanol AFR = Gas AFR x Methanol stoichiometric/Gasoline stoichiometric (6.4/14.7).
    Then, Gasoline AFR = Methanol AFR x 14.7/6.4.
    Substitute your favorite Methanol AFR where the engine is happy and calculate the gas AFR - that's what the gauge should read within a few hundredths.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Last edited by rdkerne; 07-15-2019 at 06:45 AM.

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