Wideband Sensor Placement?

[ForcedTorque]

I have been looking for a while now, and I'm constantly finding different opinions on where to put the sensor for my new Aem Wideband. I've read that it needs to be 30" from the turbo, I've read just make sure it's behind the elbow, I've read 10" back, and I've read that it really doesn't matter.

Here is what the AEM instruction book says: "If you anticipate high EGT's (over 800C), run a turbocharger, run at high RPM for extended periods of time or plan on running leaded race fuel then you must mount the sensor at least 36 inches or more downstream of the exhaust port as all of these can cause the sensor to overheat."

It also says to mount it at least at a 10* angle with the electric connection pointing upwards. The bung size is M18 X 1.5

So, would I be OK mounting it to my test pipe? I live in Alabama, where there is no inspection. I'm not exactly sure of the length of the downpipe. I currently have a Meagan downpipe with a 2 1/2" inlet/3" back. I do plan to upgrade to a full 3" DP in the future.

 

[zachm611]

some place i have been looking into taking my car to be tuned recommends 18" from the turbo. but i really dont know either. hopefully someone else will chime in.

 

[marc3]

my aem says that on turbo cars, it should be 36inch away from turbo exit.

 

[Bigdough666]

I have been looking for a while now, and I'm constantly finding different opinions on where to put the sensor for my new Aem Wideband. I've read that it needs to be 30" from the turbo, I've read just make sure it's behind the elbow, I've read 10" back, and I've read that it really doesn't matter.

Here is what the AEM instruction book says: "If you anticipate high EGT's (over 800C), run a turbocharger, run at high RPM for extended periods of time or plan on running leaded race fuel then you must mount the sensor at least 36 inches or more downstream of the exhaust port as all of these can cause the sensor to overheat."

It also says to mount it at least at a 10* angle with the electric connection pointing upwards. The bung size is M18 X 1.5

So, would I be OK mounting it to my test pipe? I live in Alabama, where there is no inspection. I'm not exactly sure of the length of the downpipe. I currently have a Meagan downpipe with a 2 1/2" inlet/3" back. I do plan to upgrade to a full 3" DP in the future.

Should be good in the test pipe. I have mine mounted in the downpipe, about a foot before the flange where it meets the test pipe. Been a couple years and it still works like a champ.

 

[ILikeCarsYesIDo]

What about for cars that have open DDP?

Silly question, but will the gases being dumped make the AFR gauge slightly inaccurate?

 

[89turbotoy]

What about for cars that have open DDP?

Silly question, but will the gases being dumped make the AFR gauge slightly inaccurate?

i would think it would make iv very inaccurate that is alot of exhaust (under boost) the wideband is not seeing. someone correct me if i'm wrong here.

and as far as mounting it in ur test pipe that would be fine and then u can use race gas:evil2:

 

[figgie]

here is the thing

800c degree = 1472f degrees

if you are seeing that post turbo. The O2 sensor will be the LEAST of your concerns when all is said and done.

 

[87witmoreboost]

i would think it would make iv very inaccurate that is alot of exhaust (under boost) the wideband is not seeing. someone correct me if i'm wrong here.

The gas should have a homogeneous AFR - especially after passing through a turbine creating a turbulent flow.

DDP should not affect what the wideband sees. If you have a DDP, you have no other choice but to stick it in after the split anyway.

As for placement of the sensor, I, myself, planned to place it in the test pipe as well. DPP or standard DP, test pipe would be a great location.

 

[IJ.]

Mine are both in the Horizontal section beside the Trans.