Location of WideBand
just run a fused wire from the battery and have the switched wire from the headunit activate it through a relay. use a decent relay and good wire and you can have a 30amp circuit that is activated by the small wiring of the headunit. i run a lot of accessories that i want to only have power with the key on off of circuits this way...usually a heated seat circuit or a radio circuit powering XM tuners and radar detectors.
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Joined: Aug 2003
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From: England UK
I put my wide band sensor in the cat delete pipe. I have LT headers, and brought a pipe which I can swap out to put in cats if I wanted to, and then it goes to the y-pipe. So my Wideband is about 2 inches back from the front o2 sensor. This is on the drivers side.
I took the output voltage wire from the gauge to the input of an unused input of the PCM (EGR valve) so i could monitor it with HP tuners, a little bits of maths to convert voltage to WBFR, certainly worth doing. I done this many years ago, but cant find my original write up for it, similar thread.https://ls1tech.com/forums/pcm-diagn...thout-eio.html
I took the output voltage wire from the gauge to the input of an unused input of the PCM (EGR valve) so i could monitor it with HP tuners, a little bits of maths to convert voltage to WBFR, certainly worth doing. I done this many years ago, but cant find my original write up for it, similar thread.https://ls1tech.com/forums/pcm-diagn...thout-eio.html
Supposedly the AF reading does not change significantly after the cats. I need to look into this, as I am building a catted Y-pipe this spring.
Can anyone confirm wideband accuracy after the cats?
Edit, it will change, but sometimes not by much:
http://www.innovatemotorsports.com/resources/news3.php
Can anyone confirm wideband accuracy after the cats?
Edit, it will change, but sometimes not by much:
http://www.innovatemotorsports.com/resources/news3.php
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Joined: Aug 2003
Posts: 970
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From: England UK
Best to put the WB sensor before cats if you can to get an accurate reading as catalytic converters can store oxygen from the exhaust gas stream, usually when the air-fuel ratio goes lean. When insufficient oxygen is available from the exhaust stream, the stored oxygen is released and consumed. A lack of sufficient oxygen occurs either when oxygen derived from NOx reduction is unavailable or when certain maneuvers such as hard acceleration enrich the mixture beyond the ability of the converter to supply oxygen. So the catalytic converter is trying to clean up the mix, ideally you want to measure before it.
Before the cats are a must. Close to the engine but at least 6-10" after a merge(like in LT's). The closer the better for response reasons. Not to close for the life of the sensor. It's best to have it mounted on the top 180* of the pipe facing down in case moisture forms.
You can run it in one bank. Just use the NB sensors to ensure both banks are fueling equally. I actually swapped a couple of my injectors from side to side until my banks read even. Then, with the WB in the driver side bank, I did my WOT tuning.
You can run it in one bank. Just use the NB sensors to ensure both banks are fueling equally. I actually swapped a couple of my injectors from side to side until my banks read even. Then, with the WB in the driver side bank, I did my WOT tuning.
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Best to put the WB sensor before cats if you can to get an accurate reading as catalytic converters can store oxygen from the exhaust gas stream, usually when the air-fuel ratio goes lean. When insufficient oxygen is available from the exhaust stream, the stored oxygen is released and consumed. A lack of sufficient oxygen occurs either when oxygen derived from NOx reduction is unavailable or when certain maneuvers such as hard acceleration enrich the mixture beyond the ability of the converter to supply oxygen. So the catalytic converter is trying to clean up the mix, ideally you want to measure before it.
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So i need to go and move the wideband up to where my cats used to be? i still have stock headers. this is all on the driver side
So you want the wide band sensor as close to the front o2 sensor as possible? Its also better to run the wideband on the drivers side vs. the passenger, Correct?
