Topdawgg

I was gonna weld in another 02 bung in the proper location, but im just curious about something..

my 4inch DP has an 02 bung in it already... but its close to the turbo...
I was thinking it would be harder on the bung to have it that close, but just wondering what you guys think..

this is for the innovate wideband that I have... and it wont be all the time, just for tuning... Normally I disable it, take it out and just plug it (as seen in pictures)




Let me know what you think, If its not a good idea, ill just put another bung in

done

I see no problem, leave it where it is.

Leave it pluged in all the times, it helps correct fuel. (closed loop) thats the point of it.

Topdawgg

ok, that doesnt help....

There is a bung there... None underneath...

And i Disable my 02 with crome... therefore the 02 sensor never changes anything in the fuel maps, its always the same...

but all i wanna know is will it hurt the 02 being so close to the turbo

mrbsponge

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Topdawgg &raquo;</TD></TR><TR><TD CLASS="quote">ok, that doesnt help....

There is a bung there... None underneath...

And i Disable my 02 with crome... therefore the 02 sensor never changes anything in the fuel maps, its always the same...

but all i wanna know is will it hurt the 02 being so close to the turbo
</TD></TR></TABLE>


im gonna say yes because in all the wideband in structions it says 24 inches because of heat, and that it may cause early failure of the O2, im sure this goes for a stock unit as well.

if youre disabling it why not just leave the plug in it

Topdawgg

im disabling the stock 02 sensor....
the one im gonna use is the wideband 02...

once im done with it, im gonna plug it

HiProfile

Its not only just heat. The way it senses the o2 content can be affected by pressures too. Having it on the outside of the 1st bend from the turbo will push air into the o2 moreso than in a straight section, or the side of the bend. You're also concentrating lots of heat at the outside of a bend. Another thing to think of is soot. Since its essentially unburnt fuel, and it will resist turning with the exhaust gasses and be flung onto the o2 sensor, and is corrosive.

If you have the ability to move it to a safer spot, why not? It takes all of $5 in parts, 15 mins of time, and a little bit of welding/cutting. If you can't weld, then its obviously a bit more. I put mine down by the oil pan just before the 2nd bend, and I can still take it out while heatsoaked w/o getting burned or jacking the car up. Its approx 18" from the turbine.

Topdawgg

yea, that all makes sense, and Ive thought about it...

But what really confuses me is why there would be a bung there in the first place... if it can never be used...

also, im wondering if i would be fine to have it like that for only a day or 2 of tuning

done

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Topdawgg &raquo;</TD></TR><TR><TD CLASS="quote">ok, that doesnt help....

There is a bung there... None underneath...

And i Disable my 02 with crome... therefore the 02 sensor never changes anything in the fuel maps, its always the same...

but all i wanna know is will it hurt the 02 being so close to the turbo
</TD></TR></TABLE>

Again, No it will not hurt the o2. That location of the bung is good.

as for disabiling it, its good to run in closed loop. when you have have temperatures changes and whatnot, the o2 will alter it for you keeping it correct.


if you look at Evos and stis, they have a o2 almost on the turbo charger.

Topdawgg

I would like to hear some more feedback from this...
thanks

xtrec02

even if the instructions say 24 inches from heat source for heat or corrosive purposes, isnt the heat source the motor anyhow and not the turbo?

Im thinking that the 24 inches is the measured like the distance the exhaust gas travels not the actual distance of the the bung from the motor.

Thats my 2 cents

Topdawgg

good point, and mine being a top mount, its actually pretty far from the motor... i keep forgetting that the turbo isnt the heat source..

superpilun

The turbo actually takes away a lot of the thermal energy away from the exhaust so it's actually easier on the sensor than if it were located in the same place without a turbo. That location is fine. 14b's have an o2 sensor housing bolted right to the turbine. If that's good enough for DSM, than it should be fine.

Topdawgg

If it was OEM i wouldnt care, but its for the wideband, thats why im concerned

Blown90hatcH

That location is about where I have had mine mounted for the past couple years with no issues.

Topdawgg

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blown90hatcH &raquo;</TD></TR><TR><TD CLASS="quote">That location is about where I have had mine mounted for the past couple years with no issues. </TD></TR></TABLE>

oem or wideband 02?

NJIN BUILDR

I have my wide band in my dd in about the same location.Same sensor in there for a couple years now.

Topdawgg

awesome, its goin in

Blown90hatcH

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Topdawgg &raquo;</TD></TR><TR><TD CLASS="quote">

oem or wideband 02?</TD></TR></TABLE>Only talking WB. I don't have a stock O2 in my car.

Topdawgg

ok, just curious...

another thing I was thinking was that I wouldnt have long enough wires to reach there... If I extended them, the resistance of the sensor could change, could it not?

NJIN BUILDR

Most wide bands (all) have an open air adjustment.Most wide bands have a fairly long lead.You location is not that unusual.

Topdawgg

ohh ok, so even IF i do extend the wires (which i might not have to) the callibration will correct it anyways...

cool

V-SPEC 1

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Topdawgg &raquo;</TD></TR><TR><TD CLASS="quote">ohh ok, so even IF i do extend the wires (which i might not have to) the callibration will correct it anyways...

cool</TD></TR></TABLE>Yes.

HiProfile

While the turbo isn't the source of heat (energy, rather), it is the focus of all that heat. You will see the turbine housing glow before the manifold. IMO they will have the o2's on factory cars as close as they can *in the proper orientation* for accurate readings, with service life coming second - easiest way to make money off an enthusiast is to have them only buy factory replacements.

If you want to know why they have the bung where it is, you only have to look at the many manifolds with misaligned runners, cracks after the first handful of heat cycles, and warped flanges. There are plenty of fabricators that do before they think.

Alfa Turbo

FWIW, I have my WBO2 (Innovate) in the same place... no problems.

SovXietday

That spot should be ok, although I prefer for mine to be a bit further down into the exhaust stream.