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Old 11-30-2020, 10:56 AM   #1
Doug Hoven
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Default Re: Not for Nuthin' But Close!

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Originally Posted by Glenn Briglio View Post
.8-.9 is what in afr?
After some research, this is about 12.8-12.9 in terms of afr.
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Old 11-30-2020, 11:00 AM   #2
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Default Re: Not for Nuthin' But Close!

Thanks Doug, I’m learning!
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Old 11-30-2020, 12:01 PM   #3
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Default Re: Not for Nuthin' But Close!

Threads like this are always my favorite.
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Old 11-30-2020, 04:20 PM   #4
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Default Re: Not for Nuthin' But Close!

Quote:
Originally Posted by Doug Hoven View Post
After some research, this is about 12.8-12.9 in terms of afr.

Doug,
Am I confused? Isn't output voltage like lambda?
.8 = 11.76:1
.9 = 13.23:1


Stan
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Old 11-30-2020, 04:29 PM   #5
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Default Re: Not for Nuthin' But Close!

Quote:
Originally Posted by Stan Weiss View Post
Doug,
Am I confused? Isn't output voltage like lambda?
.8 = 11.76:1
.9 = 13.23:1


Stan
It's the voltage on the 02 sensor as reported in the software. .450 is stoic
Target on NA is like .850 wot in PE or power enrichment mode.
A lot of tuners using the HP Tuners logging set up an Analog input from another wide band for a better Air Fuel ratio log.
Older factory ECU's are narrow band 02 sensors. . More modern are wide bands
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Old 11-30-2020, 04:47 PM   #6
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Default Re: Not for Nuthin' But Close!

From what I understand, this era of gm cars are fitted with "narrowband" o2 sensor, and there is no direct scale from the o2 voltage reading shown by the ecu to either forms of afr. Like mentioned above, .45 volts is "stoich," and when it is around .85, that should be somewhere around 13:1.
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Old 11-30-2020, 05:02 PM   #7
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Default Re: Not for Nuthin' But Close!

Robin and Doug,
Thank you


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Old 12-05-2020, 04:18 PM   #8
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