I have a Ecutout downpipe made by onefab and a plx m500 wideband. I want to know if it is safe to place the wideband O2 sensor on the 3" part of the downpipe? The bung is only like 4 inches down stream will that damage the o2 sensor? I was going to put my primary o2 sensor on the 2" part of the cutout which is about 2 feet down stream.

Let me know what you guys think.

 

I would rather have it in the 3" section because you will be racing with that open....


The only problem I see is that there may not be enough room.

If you leave the o2 to close to the end of the 3" downpipe then you risk a false reading
If you leave the o2 too close to the turbo, and the nut on the o2 gets over 550c, then you will also have a false reading.

In conclusion, bump

 

solution...mount a o2 bung downstream of the 2.5" piping split off the 3"...and mount one just before the 3 cutout in the 3" piping...your a/f will be a little leaner runing it open dp...but you could tune the open dp map w/ the wbo2 sensor somewhat close...then plug it and tune your street map for an unopen cutout

 

The bungs are already welded in the pipe. Like i said one on the 3" side and one on the 2" side.

 

on the 3" side... just extend the piping somewhat to be far enough from the turbo.. i forget what plx's website says the minimum # of inches after the turbo was.. i believe it's 24"... so extend the open 3" side and mount it there.. that's what i will be doing... it will also route all the soot away from your "clean" engine bay

 

hmm, this is a good question. I have my PLX only a few inches away from the turbo despite what the instructions say to do. I know I'm not getting anywhere near the maximum heat of the unit, but I have wondered if this affects the accuracy of the unit at all.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SHystrdyGSRtdy &raquo;</TD></TR><TR><TD CLASS="quote">on the 3" side... just extend the piping somewhat to be far enough from the turbo.. i forget what plx's website says the minimum # of inches after the turbo was.. i believe it's 24"... so extend the open 3" side and mount it there.. that's what i will be doing... it will also route all the soot away from your "clean" engine bay</TD></TR></TABLE>

The downpipe is already made. I'm not asking how to modify my downpipe, I'm asking if it is safe to run the wideband o2 sensor that close to the turbo.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ibiza &raquo;</TD></TR><TR><TD CLASS="quote">hmm, this is a good question. I have my PLX only a few inches away from the turbo despite what the instructions say to do. I know I'm not getting anywhere near the maximum heat of the unit, but I have wondered if this affects the accuracy of the unit at all.

</TD></TR></TABLE>

How long have you been running it in that spot for? As far as I know if your not reaching the maximum heat range aloud your readings should be accurate.

 

up!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrsp33d &raquo;</TD></TR><TR><TD CLASS="quote">

The downpipe is already made. I'm not asking how to modify my downpipe, I'm asking if it is safe to run the wideband o2 sensor that close to the turbo.</TD></TR></TABLE>

i know you're not asking how to make it.. i'm telling you it is not recommended to be used that close to the turbo... "Mount the wideband oxygen sensor before the catalytic converter and at least 24 inches downstream from your engine
block or turbo for optimal performance. The sensor element will fail if it is exposed to exhaust gas temperatures above 850
deg Celsius."
directly from the plx's website... i'm telling you to modify your dp if you want your o2 sensor to last.

 

Any one have experience with this?