Not for Nuthin' But Close!

Robin Lawrence · 11-30-2020, 04:29 PM

Quote:

Originally Posted by Stan Weiss

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

Doug Hoven · 11-30-2020, 04:47 PM

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.

Stan Weiss · 11-30-2020, 05:02 PM

Robin and Doug,
Thank you

Stan

Dave Noll · 12-05-2020, 04:18 PM

11-30-2020, 04:47 PM	#2
Doug Hoven Member Join Date: Feb 2018 Location: Jersey Posts: 213 Likes: 195 Liked 867 Times in 165 Posts	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.

11-30-2020, 05:02 PM	#3
Stan Weiss Senior Member Join Date: Apr 2020 Location: Phila, PA Posts: 795 Likes: 0 Liked 734 Times in 385 Posts	Re: Not for Nuthin' But Close! Robin and Doug, Thank you Stan

12-05-2020, 04:18 PM	#4
Dave Noll Senior Member Join Date: Nov 2007 Location: Div. 6, Eastern, WA Posts: 710 Likes: 2,677 Liked 240 Times in 112 Posts	Re: Not for Nuthin' But Close! __________________ Dave Noll, EF/S ,?/SA 6526

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode