Do-It-Yourself Wideband O2 Sensor

Looks sort of cool.

I'd weld a 3rd O2 bung into my off-road pipe.

 

I've built the one from www.techedge.com.au

 

If it worked right it sure would make things a hell of a lot easier.

 

BigDaddy,

that sight was kinda confusing..what was the total cost for the system? and was it worth it?

do you have to remove the wideband when its not in use or do you just use it all the time to monitor the car?

 

Techedge offers lots of different options. You can buy a prebuilt unit, or a kit, or just parts. I bought the kit, so I had to put it together, which wasn't a problem. I paid about $75 for the WB controller and the Display. I paid $128 for the sensor from thePartsBin. I have yet to put it in my car since, because I want to rebuild the motor first. I plan on putting it in passenger side pipe right after the header. I will not be leaving it in the pipe. I will install it when I'm tuning, and remove it when I'm not. If you leave it in all the time, the life of the sensor will be shortened, and it will need to be turned on when running the motor. Running the engine without the sensor powered will destroy the sensor quickly. I recommend you join the Yahoo group and mailing list. There are a lot of people who are using this kit, and are having great results.

 

I too have built the TechEdge WBO2 with display. It is a high quality kit, great instructions on the web page, and was pretty easy to build. I can't say enough good things about the kit!

I got an O2 mount placed after the header flange on each side of the y-pipe. It allows me to swap back and forth and check each cylinder bank.

 

Yeah, that TechEdge deal looks good. Could be fun to build during the winter, won't be stuck in a cold garage modding...

 

I just finished building my Australian kit. Not too bad. Good quality components and instructions. Now, I just need to calibrate it and start tuning. How did you guys hook yours up? I've heard the A/C output is 0 - 5 volts and it could just be plugged in there for logging te voltage output of the sensor. Of course, this data would have to be converted to a/f ratio using MS Excel or something.

Loren

 

You need to find out what the input resistance of the AC input is. It needs to be sufficiently different than the output resistance of the wideband unit, or there will be a voltage dividing effect, and the logged data will not be accurate and thus useless. You should ask about this in the yahoo group. It was discussed recently by Peter and some of the members.

 

The output impedance of the version 1.5 wb is 100Ohms, so the input impedance of the AC port needs to be at least 100kOhms, or the voltage dividing effects need to be taken into account.

 

Could a unit like this be hooked up to N20 solenoids to shut them down iif the car runs lean?? Theoretically, it should be possible. But how hard would it be to do?? Any thoughts??

CanadianZ

 

This is quite easy to do. You could use an op amp as a comparator whose output would drive a relay that could kill the nitrous solenoids.

 

Does buying the kit need stuff to be soldered???

Let me know

Thanks

 

Yes, quite a bit of soldering to do!

 

Not that good with soldering skills so I'll just buy it complete...