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Thread: 02 Sensor Bung Location

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    Member Not Verified Feedback Score 7 (100%) mb3000's Avatar
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    02 Sensor Bung Location

    Hey guys, I am replacing the shitty narrowband 02 that was installed on the car when I bought it with an AEM wideband. I have been thinking about the mounting angle of the sensor and just want some opinions.

    Although the bung for the previous sensor is welded at somewhat of an angle, I don't know if it meets the 10 degree minimum mounting angle. I honestly don't like how it looks. So the question is, what would you do?

    Here is a pic of the old one:

    Last edited by mb3000; 01-15-2011 at 12:55 AM.

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    I mounted mine on my TSI at about 10 oclock. Also it needs to be 36" from the turbos, it states so right in the directions.

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    Quote Originally Posted by stealthee View Post
    I mounted mine on my TSI at about 10 oclock. Also it needs to be 36" from the turbos, it states so right in the directions.
    Dyno's use a sniffer stuck a foot into the tailpipe and they are accurate, 36" is ideal but not required. Anything 9:30 to 2:30 would be good to reduce condensation damage.
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    I will rephrase, it should be at least 36" from the turbos.

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    Because thats what AEM calls for.

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    Quote Originally Posted by steve68 View Post
    Why?

    Steve
    It's in the manual, I'll even give you the link.

    http://www.schnitzracing.com/manuals/AEMWBK.pdf

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    FOr the lazy folks...

    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

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    Quote Originally Posted by steve68 View Post
    But it doesn't say that...does it?

    36in from the exhaust port......so it doesn't get too hot, temps drop going through a turbo anyway.
    After the turbo so it doesn't get too much pressure.

    Steve
    Apparently you missed this.

    Quote Originally Posted by R/T93 View Post
    FOr the lazy folks...

    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

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