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NB vs WB
http://forum.diyefi.org/viewtopic.php?f=16&t=2570
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Author:  Marek0086 [ Sat Apr 25, 2015 9:42 am ]
Post subject:  NB vs WB

Is it true that NB and WB sensors are the same... and its just the controller circuitry thats different?

Author:  malcom2073 [ Tue Apr 28, 2015 10:36 pm ]
Post subject:  Re: NB vs WB

Negative: http://en.wikipedia.org/wiki/Oxygen_sen ... _the_probe

Author:  Marek0086 [ Thu Apr 30, 2015 8:49 am ]
Post subject:  Re: NB vs WB

What are your thoughts on "tuning devices" that use a narrow band sensor?. Can a NB be "offset" to measure between, say, 12.0:1 and 13.0:1 ??

Author:  Fred [ Thu Apr 30, 2015 12:51 pm ]
Post subject:  Re: NB vs WB

NB i useless except for keeping catalytic converters happy by oscillating them back and forth past stoich...

Author:  malcom2073 [ Thu Apr 30, 2015 12:58 pm ]
Post subject:  Re: NB vs WB

Marek0086 wrote:
What are your thoughts on "tuning devices" that use a narrow band sensor?. Can a NB be "offset" to measure between, say, 12.0:1 and 13.0:1 ??


Nope. They're pretty much only useful for an ECU (typically stock, aftermarket closed loop use should WB anyway) to maintain a stoich AFR during normal (not WOT/idle) closed loop operations.

Author:  Marek0086 [ Thu Apr 30, 2015 1:55 pm ]
Post subject:  Re: NB vs WB

What are your thoughts on "tuning devices" that use NB sensors?

Author:  Fred [ Fri May 01, 2015 1:30 am ]
Post subject:  Re: NB vs WB

malcom2073 wrote:
Nope. They're pretty much only useful for an ECU (typically stock, aftermarket closed loop use should WB anyway) to maintain a stoich AFR during normal (not WOT/idle) closed loop operations.

That's not really true. They don't maintain stoich, they intentionally oscillate either side of stoich to make the catalytic converter work optimally. If they did want to maintain stoich, they couldn't do that either, swinging side to side is all they can do.

Author:  Marek0086 [ Fri May 01, 2015 7:48 am ]
Post subject:  Re: NB vs WB

I don't think thats true. The only reason they swing back and forth is because of the OEM ECU, isn't it?. Im pretty sure they could stabilize an output if the AFR was stable at stoich.

Author:  Fred [ Tue May 05, 2015 8:41 am ]
Post subject:  Re: NB vs WB

Then you clearly don't understand how narrowbands work. Sorry I couldn't explain it to you.

Author:  Marek0086 [ Tue May 05, 2015 9:13 am ]
Post subject:  Re: NB vs WB

I have some idea. Why would the output swing back and forth... rich and lean... if the AFR is constant??

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