WB02 placement in DP

[John Larkin]

Which end is best, near the turbine or down by the test pipe? Near the turbine would save my back but what fun would that be?

 

[Joe Lubrant]

Originally posted by John Larkin
Which end is best, near the turbine or down by the test pipe? Near the turbine would save my back but what fun would that be?

Hi John,

Closer to the turbine, 1"to 2" after the bend on the DP seems to work fine & easy to get at.

Regards,

 

[bruce]

Originally posted by John Larkin
Which end is best, near the turbine or down by the test pipe? Near the turbine would save my back but what fun would that be?

Down by the test pipe.
Be sure when you mount that condensation won't drain into the sensor. It needs to be tilted slightly downward.

They are somewhat back pressure sensitive, and going a little farther downstream is a good idea.

 

[TurboDave]

I'll preface my statement by saying "so far" the best location seems to be where Joe says. We've tried a couple locations (not mine) and up there seems to work out a little better. It's been a few years, and I don't remember a lot of the details, but just seemed to be smoother/faster readings up there.

 

[John Larkin]

Oh no, it's the Clash of the Titans! Well, truly I'd prefer to place it in the DP just above the a-arm sticking straight up. IMO, that would be the "hottest" signal, least diluted and easiest to get at. But I asked for advice so I guess I'm looking for a tie-breaker now if possible. Oh yeah, thanks!

 

[Chuck Leeper]

Nuther Idear!

John, Looking at most of the installs of the sensor at BG and Bristol, I saw they are in the elbow area, and as much as 12" from the face of the exh hsg.
I've heard the logic being that the WB is not really designed to operate at temps much over 1400*.
Mine is just below the bend and works fine...

 

[The Pro]

Naw, it has more to do with backpressure..

These things aren't "somewhat" affected by it, they are *absolutely* affected by backpressure....

Upon the advice of a good friend that had occasion to work on engines in a research facility for a living, I placed it on the DP (underneath, a few inches after it straightened out). Looks kinda stealthy, and is still easy to get at too...

 

[bruce]

Originally posted by The Pro
Naw, it has more to do with backpressure..

These things aren't "somewhat" affected by it, they are *absolutely* affected by backpressure....

Upon the advice of a good friend that had occasion to work on engines in a research facility for a living, I placed it on the DP (underneath, a few inches after it straightened out). Looks kinda stealthy, and is still easy to get at too...

Yes, your good friend is right.
And a quick read thru the relavent patents will prove that and the error about the 1400dF operating temp environment.

BTW, FWIW, that's where mine is.
About 10K miles on it now.

 

[John Larkin]

So underneath means (a) on the DP under the floorpan in front of the joint where the test pipe slips on or (b) on the bottom side of where the DP drops down off the exh housing? I won't drag this out unnecessarily, just clarifying. Please respond with (a) or (b). Thanks!

My cryptic diagram of a DP:
..................../===
........./==b=/
......./
=a=/

 

[bruce]

Originally posted by John Larkin
So underneath means (a) on the DP under the floorpan in front of the joint where the test pipe slips on or (b) on the bottom side of where the DP drops down off the exh housing? I won't drag this out unnecessarily, just clarifying. Please respond with (a) or (b). Thanks!

My cryptic diagram of a DP:
..................../===
........./==b=/
......./
=a=/

NSA needs you. LOL

Down by the test pipe.
I have mine on the muffler side of the test pipe, FWIW....

 

[BoostKillsStres]

I also have mine on the trans side of the testpipe angled slightly up as Bruce desciribes. It was just easier to snatch out the test pipe and take it to a friend to weld the bung in plus I didn't want to fracture the coating on my DP to put the bung in.