Where do you (or will you) install your WB O2?
I am in the final decision making process for buying a WB O2 setup. Recently, I have seen some discussions on where to mount the O2 sensor in relation to your non-WB O2's. The main concern is "sensor shadow" where the WB O2 can't do its job because the NB O2 upstream is causing turbulance. I don't know if I quite believe that, but thats why I am asking you guys.
I will be keeping both NB O2's in their stock locations because the NB emulation on most controllers is two slow for the EEC computer to overcome. The car has a Dr. Gas X pipe without the cats. I was planning on mounting the sensor horizontally on the outside of one of the downpipe legs. Specific Questions: When they say 24" from the engine block, do they mean the back of the block or the last exhaust port? What about "sensor shadow"? Is it a valid issue? Where do you have yours mounted? |
Re: Where do you (or will you) install your WB O2?
If I decide to go that route (I have entertained it a couple of times), I will probably mount it a foot or so from the front driver's side OEM 02 sensor.
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Re: Where do you (or will you) install your WB O2?
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I mounted mine in the second bung that my aftermarket cats have. My Cats have a bung before the cat brick and a bung after the cat brick. I know a few other Lightning owners that use this same location without a problem, so I am gonna try it here unless I feel like it is giving false readings, or later on I might move it upstream a little. |
Re: Where do you (or will you) install your WB O2?
It also depends on the type of WB. If it is the Bosch then I believe it has some min and max distance that it can be from the exhaust valve. I think the max is around 25 inches. I got the info from PLX.
It does seem kind of weird that PLX would state this when the O2 sensor has a built in heater. It is most likely to save on the heater time. When I installed mine I had them welded in about 2 inches downstream of the factory ones and clocked a bit. Here is the catch, After the welding was done and a couple of days went by, I heard some rattling. It ended up being slag inside from the welding that had broken loose. I was so pissed that I had to completely remove the H-Pipe (with cats) and shake out all of the remaining slag. I also at this time used a long screw driver to reach down inside the pipes to break off any other slag. If you can have it welded off the vehicle. |
Re: Where do you (or will you) install your WB O2?
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Re: Where do you (or will you) install your WB O2?
I see Lee said Drivers side. What about Clint and Eric, which side?
Does it matter? |
Re: Where do you (or will you) install your WB O2?
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Re: Where do you (or will you) install your WB O2?
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And its closer to being correct vs the tailpipe sniffer at the Dyno. ;) Nathan....Drivers side...but I can also use the passenger side also. Just for the sake of saying.... Some people turn off their rear O2's and use one of those bungs for a readout, but it would also be off a little depending upon the cats and distance. |
Re: Where do you (or will you) install your WB O2?
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Re: Where do you (or will you) install your WB O2?
Well, it's bound to do better than the sensor used for a dyno test...shoved up the tailpipe! And that does pretty well for street tuning. Stick it somewhere accessible where the pipe goes down under the car. Either side is probably ok.
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