Wideband O2 Information

[Impulse Racing]

This is a post I made off another forum to show the purpose of a wideband. I thought I'd post it here as well, maybe someone will see it as useful.



Many people think they are tuning their car great off the stock narrowband o2 sensor, but they are wrong, and sometimes dead wrong.

http://www.plxdevices.com/M-Series-Controllers/NarrowbandOutputGraph.jpg

If you look at the graph you see voltage vs actual AFR. You will notice as many people say the purpose of the narrowband is only to be accurate at 14.7:1. Anything else and it isn't even worth trying. You could be running 10:1 or a 14.4:1 with very similar narrowband o2 readings.

Now here is the output from a wideband sensor

http://www.plxdevices.com/M-Series-Controllers/WidebandOutputGraph.jpg

You notice it is linear unlike a narrowband and accurate to tune with.

A wideband is what is used on a dyno because it is accurate, and the PLX is as accurate as it claims (+-0.1 or less off).

Study the graphs closely and make sure you understand them, then tell me afterwards you'd still recommend tuning on a narrowband.

Hope this helps!

[Missing2Nuts]

good post.. probably FAQ worthy IMHO..

all i would like to add
is a few other wideband units worth looking into at the LM-1, LC-1, and my fav the AEM unit..

[Impulse Racing]

Yea, I made multiple posts on the old thread, which was actually PLX vs innovate motorsports (they make the lm-1 and lc-1).

I'll gather all my posts into 1 so it can be made into a faq, as long as it is quoted and the source remains :)

[epic]

Great addition. If you'd be willing to write it up with a bit more information, we'd be happy to include it in our FAQ section and give you credit. Not a problem.

[Missing2Nuts]

http://home.comcast.net/~grayman99/Widebands-and-Tuning.htm

also feal free to steal anything you want from that..
(i wrote it)

[Missing2Nuts]

I dident put the page together though.. a buddy from another message board did.. so.. so dont judge it based on the colors..

[epic]

I will review that and we may use that as a starter guide - thanks guys.

[Not A V8]

Impulse...is that Jeremy!?

[Impulse Racing]

It's David? I don't know any Jeremy.

[...rallyred]

excellent post. i request stick 'um.

[Not A V8]

Welcome David...I will from here on refer to you as Jeremy :P That ok? lol

[mike3800gtp]

has anyone found a somewhat affordable wide band o2 system? the AEM 1 is nice, but close to $500

[jmorgan]

you can get am lm1 for like 300

[foff667]

you can get am lm1 for like 300

i got my lm1 for $360 shipped...the lc1(if you have an analog input scanner ie hptuners/efilive) is only $200 as well...if you definitly need a guage AEM, dynojet WB commander, innovate all sell setups but yes they ARE like $400-500

[kubiache]

Will the wide band read in a way that a normal scanner can't pick up? Do you need to have a different scan program like HPT or Powertuner to read it properly?

[MKaprocki]

Most normal scanners don't have analog inputs for a wideband setup. The wideband data doesn't go into the PCM...you have to plug it into the laptop seperately, and have the scanner hardware/software read it in.


<--LM-1 with a/f gauge for $200. :D

[kubiache]

Where did you get your setup? And how the hell was is that cheap? Where do people typically find one?

I know I need to invest in one this year since I've got the mother of overlap cams, and it's damn near impossible to tune the fuel right with a stocker.

[Quijeeboe]

Impulse...is that Jeremy!?

Are you referring to Jeremy with the white Impulse from Boynton Beach, FL. If so this is one hell of a small world, he's actually one of my good friends.