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Air fuel ratio gauge?
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Mnesler View Drop Down
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Joined: 08 Oct 2021
Location: Houston mn
Points: 11 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mnesler Quote  Post ReplyReply Direct Link To This Post Topic: Air fuel ratio gauge?
    Posted: 24 Jan 2022 at 9:16pm
Just curious about using a air fuel ratio gauge for tuning a pulling tractor. Do many people you them or just tune using a dyno? Also are you looking for 14.7:1 or a little richer or leaner?
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PaulB View Drop Down
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Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 4741 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jan 2022 at 6:45am
I run EGT gauges on my pullers to keep the A/F in the ball park. It's work for me for close to 30 years. 
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Joined: 29 Jul 2013
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Points: 209 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bsallis180 Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jan 2022 at 10:16am
We have one on a tractor they dont seem to
Last long. Like to be a little richer

What are the temp you like to see on your EGT gauge on a gas motor? PaulB.
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Mnesler View Drop Down
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Joined: 08 Oct 2021
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Points: 11 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mnesler Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jan 2022 at 1:05pm
What temps are you looking for? I assume cooler temps = richer
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PaulB View Drop Down
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Joined: 12 Sep 2009
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Points: 4741 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jan 2022 at 6:21pm
You are correct; cooler exhaust is richer, hotter is leaner. I only run E85 is my pullers with spark plugs which tends to run a bit cooler than gasolines. With that I try to be in the 700-800 range. For racing gasoline, I'd think around 900-1000.
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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