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Old 02-23-2013, 01:20 PM   #1
StreetSS
 
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Measuring AFR w/ Wideband

I plan to install an AFR wideband. Car has headers w/cats and x-pipe. Where is the best place to install the sensors, and do I need two sensors to measure AFR on each bank? Or, is measurement at only one side sufficient?
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Old 02-23-2013, 01:43 PM   #2
FrankT
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One side will do, although both is better. Make sure you install the sensor(s) BEFORE the cats.
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Old 02-24-2013, 06:54 PM   #3
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Thanks! I ordered 2 since there seems to be some value added.
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Old 02-25-2013, 08:47 AM   #4
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Usually the DS bank runs a bit leaner so I put one there. Let us know what you see on the dual setup.
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Old 02-25-2013, 04:11 PM   #5
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Quote:
Originally Posted by Iam Broke View Post
Usually the DS bank runs a bit leaner so I put one there. Let us know what you see on the dual setup.
Will do. I'll post some logs. May end up not being a good use of funds, but at this point, what's a few extra bucks... Plus I had a few beers by the time I got around to ordering.
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Old 03-02-2013, 09:21 PM   #6
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Make sure the wideband is at like the 3 o'clock position so the head doesn't get wet.
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Old 03-21-2013, 07:19 PM   #7
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As promised, if anyone is interested here are the datalogging results with 2 Aeroforce widebands. There are differences in readings in both the logs and on the gauge while driving normally, usually slight. Not sure if the info on both sides was useful to the tuner or not...
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Last edited by StreetSS; 03-22-2013 at 06:58 AM.
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Old 03-21-2013, 07:40 PM   #8
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Pretty rich, but that should be good data for an updated tune!
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Old 03-21-2013, 09:09 PM   #9
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Already got the retune and ready to upload it tomorrow. Quick turn around at JRE!
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Old 03-21-2013, 11:30 PM   #10
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Did you install the O2's before the cats? If so, do you have a pic of them installed? I am considering the same setup. Just curious about the positioning because I will have to get the bungs welded onto the mid pipe. I have been told that you can just use the downstream (post cat) bungs since you tune out the second set of 02s anyway.
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Old 03-22-2013, 07:21 AM   #11
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I installed before the cats just after the collector. There is not much real estate in this area on my car. I used the do-it-yourself AEM clamps with the bung pre-welded. I got tired of taking my car to shops and having them ding or scratch it. Easy install using a stepped drill bit. Not the best picture...
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Old 03-22-2013, 07:30 AM   #12
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I thought about adding a 2nd wideband sensor also but was told the reading would be off a little. But it doesn't look to off. May try this later on also. What meter are you using?

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Old 03-22-2013, 08:00 AM   #13
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Quote:
Originally Posted by Can't_C_Me View Post
I thought about adding a 2nd wideband sensor also but was told the reading would be off a little. But it doesn't look to off. May try this later on also. What meter are you using?

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Using an Aeroforce Interceptor w/ their AFR kit. Also using SCT handheld to log.
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Old 03-25-2013, 07:09 AM   #14
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I am not sure why its so important to go in before the cats? On the dyno. The probe is inserted at the tail pipe. Obviously well after the cats. Why can't the now useless post cat bungs be used? Since the secondaries are tuned out... Hopefully someone can help answer my question


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It's a Dingledarm. It's there to dampen side fumbling. If your marzelvanes fumble too much they can cause total protonic reversal. It gets ugly from there. This is really the biggest problem with the new Camaro. That and the tri-pronged blivot.

Delivered 21 Jan 2013

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