Wide-band O2 sensors

[rwh11385]

We've been flirting with this topic before. Especially with TJ mentioning it, and making all of us curious. So let's discuss it in more depth in its own thread.

Alright, so my very basic understanding of it now is a standard 02 sensor is simple. It measures stoich, rich and lean. My guess is that a wide band 02 not only measures if it is rich or lean, but by how much, correct? So a wideband would allow for much more accurate tuning.

The Wide Band Advantage

With a narrow band sensor, we can really only tell for certain whether we are rich or lean, but not by how much.

[rwh11385]

Interesting find:
http://www.tragacs.com/wbo2.html: DIY WB oxygen sensor

You can obtain this sensor from several sources for ~$150 It was used in 92-95 lean burn 1.5 Vtec Honda Civic's. The Honda part number is #36531-P07-003. You can also get it from NAPA under #OS791. Or from the The Parts Bin. There are a couple other places as well, but beware because some vendors wanna get $900 for the exact same sensor. This sensor also called as the UEGO sensor. Pls also be aware that there is a widely avaiable Bosch wide band sensor (the LSU4 sensor), but it won't work with these kits. The sensor has a M18x1.5 mm thread, so you will have to provide such a bung on your exhaust. I've used an M18 nut and welded it up before the catalytic converter.

I'm not sure on the fitment of this on the exhaust manifold, but perhaps a budget SMT6/MAF setup can have a budget wide band O2 sensor as well! 8)

oh yeah: http://www.idaautomotive.com/prices.asp
WIDE BAND LSM 11 Lambda Sensor LeadedUnleaded $299.00
O2 Bung and Plug Great for tuning with wide band o/2 $10.00

[iXer]

Some guys down under seem to have a good product. I've yet to find any cheaper wide-band lambda system, in the summer of 2004 I'll probably order one if nothing better comes along:
Tech Edge Wideband AFR Meters

[Digitalwave]

Wide bands basically have a real time read out of the cars actual a/f ratio, it doesn't just say "lean, rich" etc., it says "13.2" or "14.7" or 12.7" or whatever the car is at, and it updates faster than you can keep up. Uego makes a nice one, called the Uego 1000, its the one I have experience with.

[iXer]

Digitalwave: What sensor is the Uego 1000 based on? Bosch or NTK?
BTW: You car looks as good as ever! :)
I've emailed EFI Systems to hear what the price is and if they ship to Europe.. what did you pay for it?

From what I hear, the wide-band lambda sensors of today react to change within 1/10 of a second which is good to know..

[Digitalwave]

It is about $500-600 USD. Here is a pic of it:



I believe it is based on Bosch, but I am not postive.

[iXer]

That makes the Uego slightly more expensive to get than the pre-built version of the "Tech Edge WB02 Lambda Meter", not that the small difference matters. It seems the Tech Edge product has excellent technical support and lots of satisfied customers.My aim is to use the wide-band lambda meter with the MegaSquirt fuel computer, probably running it closed-loop. In a few months it's time to decide which one to purchase.

[gstuning]

RPM data logger is what´s also needed when running Wide band,
for exact fuel mixture fixing,

[iXer]

gstuning: That's true.
Datalogging saves a bunch of time tuning the engine. With the MegaSquirt it looks like MegaTweak3000 is where it's at. You can find software for the MegaSquirt here:

http://home.earthlink.net/~jcgebhart/mscompat.html

[gstuning]

I am working on getting a special smt6 that has Wideband dataloggin cababilities

It can also send out a narrow band for the stock ecu so it does not give a check engine signal, and you can decide on the signal, like if you want your ecu to see 14.2 at WOT everytime you can simply put 14.2 in the highest column,

[iXer]

A friend of mine with a Toyota Celica GT4 and an SMT-6 could really use something like this, he is looking into getting a wide-band lambda sensor for tuning purposes in the coming months but the addition of datalogging would make it even more useful.
Could you give me some more information on this special version of the SMT-6 ?