Pulling Forum - Air fuel ratio gauge?

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Air fuel ratio gauge?

Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=185997
Printed Date: 28 Apr 2024 at 7:32am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Air fuel ratio gauge?

Posted By: Mnesler
Subject: Air fuel ratio gauge?
Date 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?

Replies:

Posted By: PaulB
Date 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.

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If it was fun to pull in LOW gear, I could have a John Deere.
If you can't make it GO... make it SHINY

Posted By: bsallis180
Date 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.

Posted By: Mnesler
Date Posted: 25 Jan 2022 at 1:05pm

What temps are you looking for? I assume cooler temps = richer

Posted By: PaulB
Date 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.

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If it was fun to pull in LOW gear, I could have a John Deere.
If you can't make it GO... make it SHINY