I just bought a downpipe and AEM wideband and installed them a few days ago. My downpipe came with the bung and you could see it from the top of the motor looking down the back side. I think its a good location that way the harness has a straight shot into the cabin.

Any ideas how many inches from the o2 housing?

92gsxbafaro said:

Any ideas how many inches from the o2 housing?

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mine is in the stock location front o2. no problems at all. i also run the AEM. so to each their own. there is much debate on where to put it for sensor life. i am also simulating my Front o2. most say 18 inches after the turbo is optimum, but it yeilds some lag on the accuracy.

urbansmoker1 said:

mine is in the stock location front o2. no problems at all. i also run the AEM. so to each their own. there is much debate on where to put it for sensor life. i am also simulating my Front o2. most say 18 inches after the turbo is optimum, but it yeilds some lag on the accuracy.

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Would farther back be more accurate?

Some say the censor gets killed faster running closer to the turbo. I've even seen people put them in the rear o2 censor location

bagii said:

I just bought a downpipe and AEM wideband and installed them a few days ago. My downpipe came with the bung and you could see it from the top of the motor looking down the back side. I think its a good location that way the harness has a straight shot into the cabin.

Click to expand...

I have my AEM in this location w/o any problems. I believe the farther away the less accurate it gets.

I installed my wideband in my o2 housing and used ecmlink to do the narrow band simulation. If you have or are going to get ecmlink, then I would do that.

If you want to install it in your downpipe, most people recommend installing it after the bend, and before (upstream) the flex section, as the flex section can leak and give you odd readings of the wideband. Also, you want to install it in around the 3'oclock position so water and condensation don't collect on the sensor.

The closer you install it to the engine the more accurate the reading will be. People say if you install it too close to the engine that the heat will kill the sensor prematurely, but many people install it in their o2 housing with no problems.

A weld-in M18 X 1.5 boss is supplied for sensor installation. Mount the O2 sensor in the exhaust system at least 18 inches downstream from the exhaust port. 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.

On turbocharged engines the UEGO sensor must be installed after the turbo charger, if not, the pressure differential will greatly affect the accuracy of the unit. For accurate readings, the sensor must be mounted before catalytic converters and/or auxiliary air pumps. To prevent collection of liquids between the sensor housing and sensor element during the cold start phase, the installation angle should be inclined at least 10° from horizontal with the electrical connection upwards,
see below.


Mine isn't quite 36 inches but it is on the bend of the downpipe at an angle.

They make blankets for wires and sensors, here's the link:
http://www.thermotec.com/products/14035-express-sleeves.html

They make heatsinks for them too, here's the link:http://www.ebay.com/itm/Wideband-O2...2146398018448775847&pid=100015&prg=1006&rk=1&

Thanks alot the day that it comes in the mail ill feel comfortable with the placement haha

I also have mine in the o2 housing. No problems here

Roberti 2G said:

I have my AEM in this location w/o any problems. I believe the farther away the less accurate it gets.

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You are correct the farther the sensor is the farther the exhaust.fumes has to travel. if your going to put your wideband in the front o2 just don't anti lag the hell out of your car all the time. Bad for the sensor and turbo.