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Can you run two wideband 02 sensors ??

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Old May 31, 2006 | 12:54 PM
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Default Can you run two wideband 02 sensors ??

And HOW do you make them work with one gauge ???, Also...is there a way to reduce the voltage so as to be able to use them as with the factory PCM (I could make a pcb with a couple of zener diodes on it to convert 0-5v to 0-1v but I'm looking for a professional solution)??

The reason I'm asking all of this is that I want to install a WB sensor in each downpipe in place of the front O2's and use them as both WB and regular O2's.....without switching to a MegaSquirt or other aftermarket engine controller (although that may be a required future mod).

Any ideas ??
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Old May 31, 2006 | 01:11 PM
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http://hptuners.com/forum/showthread.php?t=2947


I remember seeing stuff in my manual for the LC-1 about running two WB together, so I would say yes you can.
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Old May 31, 2006 | 01:33 PM
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Not sure about HPT, but with EFI Live you could run two WBs pretty easily.

LC-1 has two analog outputs, one of them pre-configured as a narrowband simulator, the other preconfigured as WB output. You could fairly easily create a plug and play harness from a pair of old NBO2s.
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Old May 31, 2006 | 01:54 PM
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Originally Posted by dc_justin
Not sure about HPT, but with EFI Live you could run two WBs pretty easily.

LC-1 has two analog outputs, one of them pre-configured as a narrowband simulator, the other preconfigured as WB output. You could fairly easily create a plug and play harness from a pair of old NBO2s.
THANK YOU !!!

I'm not real worried about logging the WB's right now...I need to upgrade to the MPVI before I can log external inputs

I'm glad to head that the LC-1 has a narrowband simulator output....that solves all of my problems.

Any idea if the NB output scales correctly to the WB output or does it bounce around like the standard NB output ?? I guess what I'm asking is if I logged NB output through HPT I could just scale it to get actual WB output and save myself the cost of upgrading to th MPVI interface ??
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Old May 31, 2006 | 03:20 PM
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By logging the NB inputs you will lose ALOT of precision. They only give readings from 0-1v. While the EIO analog range is 0-5v. 500% reduction in accuracy over the same AFR range.

Also i run dual LC-1's for narrowband simulation. So i can return to closed loop operation while making sure that they're accurate
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