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  •  » Some questions on Air/Fuel gauge sensors

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    9/08/2014 11:36 AM  #1

    Mochaman
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    From: Royse City, Texas
    Registered: 4/02/2013
    Posts: 1,425

    Some questions on Air/Fuel gauge sensors

    Will this work on Classic cars set up with Carbs?
    Should this be a permanent installation or just something you use to set your jets on Carb then remove?
    Wide band versus narrowband?
    Any good or bad models to buy/avoid?
    Is there a handheld model to use for temp use?

    When I had my exhaust installed a couple weeks ago I had the guy install a O2 sensor bung and threaded cap. He put it in at no cost.
     

     

    9/08/2014 3:36 PM  #2

    Rudi
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    From: Stuck in the 50's Welland Ca
    Registered: 4/01/2013
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    Re: Some questions on Air/Fuel gauge sensors

    I have an O-2 sensor in each header that feeds a DPDT mini switch on the pillar pod connected to a wide ratio Autometer AFR. That way I can monitor each cylinder bank on my carbed engine.


     

    Last edited by Rudi (9/08/2014 3:39 PM)

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    9/08/2014 5:10 PM  #3

    Derek
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    From: Eatonton GA
    Registered: 4/01/2013
    Posts: 549

    Re: Some questions on Air/Fuel gauge sensors

    Mochaman wrote:

    Will this work on Classic cars set up with Carbs?
    Should this be a permanent installation or just something you use to set your jets on Carb then remove?
    Wide band versus narrowband?
    Any good or bad models to buy/avoid?
    Is there a handheld model to use for temp use?

    When I had my exhaust installed a couple weeks ago I had the guy install a O2 sensor bung and threaded cap. He put it in at no cost.
     

    I would say even more useful on ah carbureted car then EFI. The EFI will control it's self, and there's little you can do about it. Where as it's up to you to calibrate the carb. I've also heard of guy's using pyrometers to measure exhuast temps back in the day, although I have no idea why that could be useful. I'll look into it though.
     

    Last edited by Derek (9/08/2014 5:11 PM)

    It's hard to type "funny"
     

    9/08/2014 5:34 PM  #4

    Raymond_B
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    From: Fort Worth, TX
    Registered: 4/01/2013
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    Re: Some questions on Air/Fuel gauge sensors

    Will this work on Classic cars set up with Carbs?
    Absolutely yes.

    Should this be a permanent installation or just something you use to set your jets on Carb then remove?
    You could, but most leave it permanently.

    Wide band versus narrowband?
    Wide is the only one to use

    Any good or bad models to buy/avoid?
    I like Innovate, I've used a ton. FJO is solid too.

    Is there a handheld model to use for temp use?
    I haven't seen a kit like that, but I would imagine someone makes one. But the sensor goes in the exhaust, unless you mean the gauge, generally that needs power, ground, etc. Some of the kits have data logging from the controller so you could consider a laptop handheld You could wire everything up, tune and then take it out of you wanted to. But next time you tune you'd have to hook it all back up, bleh.

    Last edited by Raymond_B (9/08/2014 5:40 PM)

     

    9/08/2014 5:37 PM  #5

    Raymond_B
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    From: Fort Worth, TX
    Registered: 4/01/2013
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    Re: Some questions on Air/Fuel gauge sensors

    Derek wrote:

    I would say even more useful on ah carbureted car then EFI. The EFI will control it's self, and there's little you can do about it. Where as it's up to you to calibrate the carb. I've also heard of guy's using pyrometers to measure exhuast temps back in the day, although I have no idea why that could be useful. I'll look into it though.
     

    People tune all the time with EGT's, especially race cars. They mount the probes in the headers right by the exhaust port and use one per cylinder. You have to make a hole in the header for each probe. For most street cars that's not practical so folks use WB's way more.
     

     

    9/08/2014 9:01 PM  #6

    Mochaman
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    From: Royse City, Texas
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    Re: Some questions on Air/Fuel gauge sensors

    Well that is cool. Glad I had the bung welded into the Xpipe. Will start looking at some set ups. I like the Pillar picture Rudi posted. I have have to throw a small Tach into something like that.
     

       •Thread Starter
     

    9/09/2014 8:02 AM  #7

    DC
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    From: Marshall, MI
    Registered: 4/01/2013
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    Re: Some questions on Air/Fuel gauge sensors

    Most racers (including me) use the exhaust gas temp because we love Tetra Eythl Lead in in our gasoline! And that stuff ruins the O2 sensors.

     

    9/09/2014 8:12 AM  #8

    wsinsle
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    From: Belle Vernon, PA
    Registered: 4/01/2013
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    Re: Some questions on Air/Fuel gauge sensors

    Always learning something new on here!

    If this forum can't fix it, it isn't broke.
     

    9/09/2014 1:13 PM  #9

    Mochaman
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    From: Royse City, Texas
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    Re: Some questions on Air/Fuel gauge sensors

    Liking the look of this gauge and sensor setup.
    http://www.innovatemotorsports.com/xcart/product.php?productid=16328&cat=273&page=2
     

       •Thread Starter
     

    9/09/2014 3:01 PM  #10

    eds67
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    From: Wylie,TX
    Registered: 4/27/2013
    Posts: 28

    Re: Some questions on Air/Fuel gauge sensors

    I have one on the swap meet page if interested. Let me know

     

    9/09/2014 7:09 PM  #11

    DC
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    From: Marshall, MI
    Registered: 4/01/2013
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    Re: Some questions on Air/Fuel gauge sensors

    Have always used the exhaust gas temp on dyno and in car to get really close and then plug cuts to push the limit. If I am really close to where I want ot be, but need a little more, I will run a plug cut at the end of qualifying to determine if I can lean it a little more. I use a magnifying glass and look at the root of the plug where the insulator meets the body. If it is blackish, I can lean it out. If it is brownish I can lean it out. If it looks like white paint down there you are perfect, but there is a little more. If there are pepper tracks like little dark spots on the white, you are now perfect and on the edge!

    OBTW the gas temps at this point are usually between 1200 to 1400 degrees F about an inch from the header flange in the header tube. Remember this is a race car at wide open throttle and near red line.

    Last edited by DC (9/09/2014 7:11 PM)

     

     

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