wbo2 sensor flange position

[eyefi]

i have to decide on the position of my wideband o2 sensor bung. i'm trying to decide between the near turbo location and the midpipe location. the turbo exit position seems a bit too hot but is the position of choice for the single downpipe manufacturers. i would also have trouble with the midpipe location because i couldn't manage the accomodate the 10-2 o'clock position to avoid condensation damage.

 

the sensor is a bosch 6066

any comments or advice?

 

cheers

[Dragonball]

I 'thought' that the only suggestion that it really neded to be within 3 ft of the manifold m8

 

Thats where have had them fitted before - and you should be OK on onside position at 10am?

[JohnA]

What's wrong with fitting it exactly where the stock one is, replacing it?

That's what I had on the Calibra, and the ECU was more than happy with the narrowband emulation (the quality/accuracy of the signal was far superior to that of a new narrowband, the difference in running was immediately obvious)

 

That way you avoid imposing another restriction in the exhaust path (every little helps!)

[Ian C]

The stock sensor has a flange welded to it and two bolts hold it on, wheres every other O2 sensor under the sun is a screwthread fitting So it's as much of a pain to fit in the stock location as anywhere else, just a different sort of pain.

 

Mine is mounted at the outer radius of the second bend in the centre section (2nd cat replacement). It's at about 25deg off the horizontal which is well beyond the recommended minimum of 10deg, and the wiring goes straight up through the gear gaiter. Lovely job

 

And you are suppsoed to have them a *minimum* of 3ft away from the turbo outlet, not within But then some people have them mounted next to the stock one and they still work, perhaps the lifespan drops to 2 years instead of 3 or something due to the heat...

 

-Ian

[JohnA]

The stock sensor has a flange welded to it and two bolts hold it on, wheres every other O2 sensor under the sun is a screwthread fitting

ouch, so replacing the little booger isn't a piece of cake, is it then?

If only I knew I would have fitted the bung on the first decat pipe that I had out on Friday

 

So which is the best way to access the O2 sensor without access to a lift then? from above or below?

And do you just undo the flange then, instead of the sensor itself?

 

Sorry for the hijack, but it's relevant isn't it...

[eyefi]

Mine is mounted at the outer radius of the second bend in the centre section (2nd cat replacement). It's at about 25deg off the horizontal which is well beyond the recommended minimum of 10deg, and the wiring goes straight up through the gear gaiter. Lovely job

 

that sounds like the cw decat position? there is also a lovely rubber bung nearby that give access the trans tunnel under the center console.

[eyefi]

What's wrong with fitting it exactly where the stock one is, replacing it?

 

i don't have the stock piping. my new downpipe and mid pipe are just being made.

[eyefi]

ouch, so replacing the little booger isn't a piece of cake, is it then?

If only I knew I would have fitted the bung on the first decat pipe that I had out on Friday

 

So which is the best way to access the O2 sensor without access to a lift then? from above or below?

And do you just undo the flange then, instead of the sensor itself?

 

Sorry for the hijack, but it's relevant isn't it...

 

2 bolts on flange, get to it from the top. it's been a while since i was down there with the stock turbos on. its on the 2 to 1 section just before the cat1.

[eyefi]

it was the 3ft away from turbos that had me worried about the turbo exit position but i've just been reading some more and at also says not to excede 750degc gas temp which could be close in that position. my exhaust guy reckons that the 1st bend on the downpipe is the hottest part of the exhaust.

 

i think i'll have to try and fit it in the midpipe.