If you clicked on this thread you´re probably aware of what a wideband lambda sensor is,and that buying stand alone systems(converter and sensors) are fairly expensive.
Not only that,but the NTK UEGO has skyrocketed in price range also.

Here´s the deal.

We´re a team of enthusiasts that are currently well under way of putting together a digital converter based on the currently available Bosch sensor instead.

The digital converter will be able to sample not only the WB data,but we´re at the moment trying to figure out the neccesary other input as well.
Ie; TPS voltage,MAP voltage aso.

The cheapest resource for OEM install Bosch´s at the moment seems to be Volvo.

We´re thinking along the lines of marketing this digital box including software needed to run via laptop,and the price range will hoover around the 350$ mark.

Sensor will run another 150 approx.

Would you in this case have interest in such a tool for said money?

 

So you want to make a piece of hardware to run a WB O2 sensor. Thats no bog deal in and of itself, the DIY-WB project has already published how that can be done. Except for the sensor, you can build the necessary circuitry for dirt cheap now. So paying $350 for that would be about as bad as anything else availbale commercially.
Seems like you're also talking about building a data-logging capability as well. To make it worthwhile at that price though it would have to be a pretty polished piece of hardware with the ability to monitor RPM, VSS (and also be adaptable to all the vairous VSS signals used over the years), MAP (or MAF), and might as well include CTS, IAT and TPS too.
Of course it's probably be hella easier to write software to run a normal ALDL serial stream and merge it with a WB signal from your black box. But then you're limited to the baud rate of the ECM whereas your standalone piece could be much faster. But what you're proposing would need some kind of adapter to make installation inline with the ECM signal wires easy and clean. At least using the ALDL stream is very tidy. And of course of you were super hella cool you would just figure out where to sneak a WB O2 signal into the ECM so that it could easily be displayed as part of a nrmal scan tool. Again, limited by resolution of the ECM stream, but sooooo tidy.

I don't know, good luck with it. Keep in mind that the DIY WB project is just that, DIY and if you attempt to use it for your own gain then you will be subject to some nastiness (don't know if thats where you got the idea or not, just making sure you aren't)

 

Trust me.
The PCB layout we´ve developed hasn´t one thing in common with the DIY.
As stated it is also digital in operation,something the DIY is not.

As i wrote the box isn´t merely a device for sampling the WB output,cause IOP the mere data from the sensor is more or less pointless.

For instance,those of you that have logged the ECU data have more then once run into the situation where you altho you truly "think" you´re at WOT the TPS says 90% or so.

In essence the logging/sampling of what we´re doing here could be taken to the limit if need be.
*** knows the MP has room for it...

Basic Q really is how MUCH sample info is needed?

The obvious engine parameters are cool.
On the other hand stuff like EGT input,G-tech input and what have you could be displayed the same way.

 

DVC
I work for a new fuel injection company now. We have datalogging of everything that the ECU sees and calculates, and a nice graphing and all that, but when we datalog our Lambda Boy, the data is useless because it is so jumpy. If your setup can provide a smooth and *accurate* output, I'd be in heaven. Currently, we're experimenting with a Labjack to see if that will read a smoother highspeed output from the Lambda Boy, but we haven't finished the programming yet to integrate it into our graphing software. We're going to also use it to measure the same sensor signals that the ECU uses, at a much higher speed, for tuning purposes.
The best advice I can offer is to allow a serial or usb output to a laptop or whatever and make some graphing software so it is usable, rather than having to stare at numbers while driving. Also, convert the output from voltage to something useful, like kPa, °F or C, TPS %, and also have an RPM measurement.
Anyway, keep Injection Logic in mind when you finish, because we might be interested. I can be reached at jschmidt@injectionlogic.com.
Good Luck,
Jeremy Schmidt