07-04-2018, 07:37 PM | #1 |
Drives: 2012 SS Join Date: Feb 2016
Location: Lubbock Texas
Posts: 121
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Wideband A/F guage
I was wondering that since my rear O2s are turned off, could I use one of t the bungs for a wideband O2 sensor, or is it too far down stream. I do not have cats at the moment. Thanks in advance.
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2012 2SS/RS 6speed, Howards asa cam on 113lsa Stainless works LT's, NPP exhaust, Z28 Cai, 3.91 gears. Tuned by Blue Thunder 2 racing Lubbock Texas.
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07-04-2018, 08:04 PM | #2 |
Drives: 2011 Camaro SS 6sp Join Date: Nov 2016
Location: Drivers Seat
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Most widebands will tell you in the installation instructions where they prefer to be placed. Like 18-30 inches downstream for example. I think that second bung may be too far. I had one welded in a few inches before my first o2 sensor inside the header collector, and slightly offset so it didn't block the airflow of the stock one.
It only cost me $40 for the weld job.
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09-30-2019, 12:28 AM | #3 |
Drives: 2013 Camaro SS Join Date: Feb 2017
Location: Indiana
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I have the same question about using the o2 sensor location for the wideband. I'm also catless with long tube headers.
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09-30-2019, 01:43 AM | #4 | |
Quote:
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09-30-2019, 03:50 AM | #5 | |
Drives: 2013 Camaro SS Join Date: Feb 2017
Location: Indiana
Posts: 901
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Quote:
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09-30-2019, 06:54 AM | #6 |
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Just follow the directions of the manufacturer. You do want to put it in a place where all the gasses from the primaries converge, not just in a single primary. Make sure the sensor is clocked in such a way as to allow condensation from start up to travel away from the sensor, not pool into the sensor.
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09-30-2019, 08:44 AM | #7 |
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Location: St. Charles, IL
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The rear O2 sensor bungs are fine and make a great spot for your wideband. If you do decide to add another bung just don't place it on the bottom half the pipe. Water can collect on the bottom and you don't want the sensor facing down if you bottom out.
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10-01-2019, 10:53 PM | #8 |
Angewendet Ingenieur
Drives: 14 Camaro ZL1 Join Date: Apr 2015
Location: USA
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I would not place the sensor downstream it needs accurate temperatures coming Cleanly from the exhaust to provide accurate data, not to mention the potential damage if the cat comes internally apart or the cat is not 100% sealed.
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10-02-2019, 04:28 AM | #9 |
Drives: 2013 Camaro SS Join Date: Feb 2017
Location: Indiana
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10-02-2019, 08:34 AM | #10 |
Drives: 2010 Camaro 2SS/RS M6 Join Date: May 2009
Location: Idaho
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I look at this a couple different ways. The safest thing to do is follow the manufacturer's suggested location in terms of distance downstream. That's what I did. I put mine in the header collector, in front of the HFCs. Since you don't have cats, I see no problem with the sensor being a little bit further back to take advantage of the existing bung(s).
If you don't have a wideband, the dyno tuner will just put the sensor in the end of your tailpipe anyway. That is a lot further back than the rear O2 bung.
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10-02-2019, 08:30 PM | #11 |
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10-03-2019, 08:54 AM | #12 | |
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
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Quote:
Ted.
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10-04-2019, 01:54 AM | #13 |
Angewendet Ingenieur
Drives: 14 Camaro ZL1 Join Date: Apr 2015
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RIGHT ON POINT!
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10-04-2019, 06:52 AM | #14 |
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That's strange, if all this is true, why do dyno's have a wideband for tuning that fits in the tail pipe? 4 wire sensors are heated so that parts irrelevant. With the exception being the time delay from the engine output until it reads on the gauge, I dont see a disadvantage for installing a few inches farther back. Maybe if you're using it for data logging you might want the fastest response possible.
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