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Old 03-21-2010, 06:25 PM   #1
maxgs
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O2 sensor success!

Woo hoo, I now have an O2 sensor integrated into my data acquisition. Can't wait to get to the track to see the A/F as I ride.

-Curt
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Old 03-24-2010, 02:05 AM   #2
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your electronics never cease to amaze me! you are putting them AMA boys/gals to shame!
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Old 03-24-2010, 04:43 AM   #3
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I think ur electronics are worth more than some ppls bikes!!!
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Old 03-24-2010, 06:40 AM   #4
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got any nifty pics curt? and what will you be able to learn now that you can see A/F ratio?
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Old 03-24-2010, 07:05 AM   #5
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No pics, actually. It's all tucked up under the bike and doesn't look particularly special, just a wide band O2 sensor that's about the size of a spark plug. It's displayed through my normal data acquisition display. After the track this weekend, I'll have to modify the video template to show air/fuel. I've looked at it, and there isn't a really natural place to show it. And then the question of how... numbers, dial gauge, colored slider. Who knows.

I did notice that the bike runs over 16 a/f on idle. Under no load conditions it stays right above 12 up through almost 8k rpm. Probably meaningless since the engine is not experiencing any load.

Should be an interesting weekend. New tires too. Finally switched to Pirelli. Larry Myers would be pleased.

-Curt
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Old 03-24-2010, 08:03 AM   #6
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Lots of us ran Speedtune 02 sensors on our Yamaha TZs and Honda RSs in the 1990s and into the early 2000s. I especially liked them on my 250 since I could run one on each pipe and see how the different cylinders were behaving. I haven't owned/raced a TZ since 2002, but I suspect racers of these bikes still use them. These units were somewhat basic and simple to install. I take it your install is somehow more involved, though. What'd you have to do?
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Old 03-24-2010, 09:39 AM   #7
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Linz,
The install wasn't that bad, just custom. The Akra exhaust comes with a smaller O2 bung in the collector. I couldn't reuse that bung as the orientation and the location was wrong for the larger wide band sensor. The way I ended up finding an appropriate mounting spot was to measure the height of the sensor installed in the bung and cut a piece of wood that length and 3/4" x 3/4". I then got under the bike and started looking where the sensor would fit and not get in the way of the rear suspension. I marked it, then traced the spot with the bung with an orientation mark and then took it to the welder.

After dropping everything off, the welder called to tell me my exhaust collector wasn't titanium. That was a surprise. So the 50.00 Ti bung I bought was useless. I found my original carbon steel bung and took it over. There were no fitment issues, just a question of rust. In the end I had them machine me a new
stainless bung and just be done with it.

Routing of the O2 sensor wires took a
little thinking. The connector is HUGE. Larger than the sensor itself. Anyway, found a spot, tied the wiring off nicely and called it good.

Wiring the sensor wasn't too bad. My O2 sensor has to be 600 degrees to work
properly. It needs it's own power wire and a switched source that can handle an incremental 2 amps. The way it's designed, the data acquisition turns on the O2 sensor. Since I don't use data acq all the time, I had to consider that as well. The reason this is important is that an O2 sensor can be damaged if it is mounted and not heated. So, I also ensured that an external trigger
wire has power whenever the bike is running.

The last step was to program the new sensor into the data acq system and reprogram the display to show the O2 reading.

None of this was difficult. I just had to think through everything.

-Curt
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Old 03-24-2010, 09:58 AM   #8
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sounds like a good project. can't wait for the vids with the new data.
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Old 03-24-2010, 02:04 PM   #9
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i love my inexpensive aem wideband. I have bungs welded on to many of my pipes. Jetting became a snap.

as a data enthusiast, your electronics always keep me envious.
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