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> 3.2 engine 02 sensor
GulleyGulley
post Feb 27 2013, 08:55 AM
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Doing some wiring layout work on my 3.2 conversion. Where should the O2 sensor be installed in the exhaust? I have 1 5/8" headers. Can I install where the 3-lengths on the passenger side merge before going into the muffler?
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Cupomeat
post Feb 27 2013, 08:59 AM
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Where they merge is the best place for overall mixture as it gives you an indication of the mixture of three, not just one cylinder.

I hope that helps. BTW, if you look at the TOMERIC build thread, he has installed one at the collector point of the right MSDS header.
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MoveQik
post Feb 27 2013, 09:28 AM
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What size wheels can I fit?
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Here is where mine was put. Prior to ceramic coating.



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GulleyGulley
post Feb 27 2013, 09:40 AM
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Picture shows what I was thinking. Thanks.

Cupomeat - I sent a PM to Tomeric. Trying to coax him to my garage for some help. I'm in Syracuse too
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larryM
post Feb 27 2013, 08:32 PM
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but why?

you don't need an 02 sensor - just disable the thing via the DME switches - or get a chip from any of the several chip sellers that bypass the 02 requirement

just read this: 02 sensor function

it takes a leap of faith to believe that TWO sensors can be ganged together to talk to the single DME input - or yu could put in a switch and only read half the engine at a time - dunno what you can gain by that?


p.s. - my 02 bungs are just like in the above triad pic - but i put em there only so i could use em to wide-band tune webers on the 2.7 that is now history - now i will use them to fine tune the Motronic after i re-chip it

I already have purchased Wilke's 911 race chip 911 DME chips
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Jeffs9146
post Feb 27 2013, 11:37 PM
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I put mine in the same spot on my 3.0L with 1 5/8"! It seems to work well and I pass smog in Cali! Not that I need too and not that..that, is a good thing but it is running great!
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Ductech
post Feb 28 2013, 01:06 AM
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Ok here's my two cents... The 02 sensor in question ... How many wires does it have? Buck says its narrow band and is only used by the ecu for closed loop fuel trimming during slight open throttle cruising. So in my opinion pick a cylinder and stick it. Of if it can be disabled it wouldn't be a horrible thing.
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GulleyGulley
post Feb 28 2013, 08:41 AM
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Its a 3-wire sensor. If I can disable it in the DME that would be my first choice. I'm not worried about passing emissions.
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Ductech
post Feb 28 2013, 06:03 PM
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They really don't do much for emissions more for getting decent mileage on cruising. It's a narrowband so I would figure out getting rid of it.
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mepstein
post Feb 28 2013, 08:00 PM
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Much of the talk on Pelican suggests keeping it. Better gas mileage is a plus these days.
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jim912928
post Feb 28 2013, 08:08 PM
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Bosch manual says to put it at an angle..not straight up and down (not sure why...just said it)
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Ductech
post Mar 1 2013, 01:57 PM
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Placement advice of 02 sensors is important look up the install notes for a innovate wideband controller. They suggest a bunch of stuff in order to keep the sensor in good working order
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GulleyGulley
post Mar 1 2013, 05:33 PM
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I ended up picking up & installing a new sensor. From what I've read it helps with fuel management & idle. If I chip the ecu I will remove plug I'm sure I'll chip it sooner than later.
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jim912928
post Mar 4 2013, 02:24 PM
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here is the Bosch tech sheet:

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larryM
post Mar 14 2013, 10:15 AM
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.just read this:

02 sensor function Motronic

.
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