AFR gauge w/ WB o2 Sensor
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This is a discussion on AFR gauge w/ WB o2 Sensor within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Hey all - just wondering...For those of you that have an AFR gauge installed. I am planning on doing an ...

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    MAINEiac 11blackSTi's Avatar
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    AFR gauge w/ WB o2 Sensor

    Hey all - just wondering...For those of you that have an AFR gauge installed. I am planning on doing an install on my 2011 STi, and I was wondering how far back from the turbo you actually have to go. The install says you have to go back from the turbo charger at least 36 inches but before the catalytic converter...I didn't think there was that much room between the turbo and the cat. If any of you have done this how far back from the turbo is you o2 sensor mounted?
    thanks,

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    zax
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    The requirement is approx. 18" downstream from the heads, not turbo. Realistically, you'll be OK if you run the WBO2 in the bung 3" downstream of the turbo (many DPs have this bung), though it is a good plan to run a copper heat sink with the sensor to improve longevity.
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    MAINEiac 11blackSTi's Avatar
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    Ok cool. I won't be installing it myself, but I was just wondering. I figured people on here have probably done it. My thought is that they will probably ask me how far back I want them to put it and I thought I would get some of the opinions on here so I know what to tell them

    Thanks again!

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    Quote Originally Posted by 11blackSTi View Post
    Ok cool. I won't be installing it myself, but I was just wondering. I figured people on here have probably done it. My thought is that they will probably ask me how far back I want them to put it and I thought I would get some of the opinions on here so I know what to tell them

    Thanks again!
    FWIW, don't spend $70 on a WBO2 heat sink... just get a piece of copper, drill a hole in the center, then bend it up away from the DP.
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    MAINEiac 11blackSTi's Avatar
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    Quote Originally Posted by zax View Post
    FWIW, don't spend $70 on a WBO2 heat sink... just get a piece of copper, drill a hole in the center, then bend it up away from the DP.
    So just a small piece to put over the o2 sensor and then bend backward to deflect the exhause from hitting it directly?

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    zax
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    Quote Originally Posted by 11blackSTi View Post
    So just a small piece to put over the o2 sensor and then bend backward to deflect the exhause from hitting it directly?
    It's actually not for deflecting heat, the copper will remove heat from the O2 sensor and radiate into the ambient.
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    MAINEiac 11blackSTi's Avatar
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    Quote Originally Posted by zax View Post
    It's actually not for deflecting heat, the copper will remove heat from the O2 sensor and radiate into the ambient.
    Makes sense...I guess the less stuff in there causing flow restriction the better...Thanks for the tip!

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    MAINEiac 11blackSTi's Avatar
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    Once I get the AFR gauge up and running, how would I make any adjustments that would need to be done (if any?). I am planning on having my access port hooked up by then as well, so is this something I can do via the access port?

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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by 11blackSTi
    Once I get the AFR gauge up and running, how would I make any adjustments that would need to be done (if any?). I am planning on having my access port hooked up by then as well, so is this something I can do via the access port?
    I'm not sure if this is available for Subarus (it mentions Mitsubishi in the forum category), but:
    https://forums.cobbtuning.com/forums...to-AccessTUNER

    I don't have a Cobb account (required to view PDF), and I have no intention of making one any time soon. You may have to reach out to Cobb on this one, if it's vehicle-specific.

    Changes would need to be done via the ATR software, and your updated map would get flashed onto the car. Expect to do multiple iterations in order to get the MAF scaling for that Perrin intake in place, unless you can find values online. Cobbs +/-8% is a bit too lenient, for my taste, and prefer things in the +/-5% range, which in the OpenECU community, is the general practice.
    Last edited by EJ257; 01-22-2013 at 02:10 PM.
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    Quote Originally Posted by EJ257 View Post
    I'm not sure if this is available for Subarus (it mentions Mitsubishi in the forum category), but:
    https://forums.cobbtuning.com/forums...to-AccessTUNER

    I don't have a Cobb account (required to view PDF), and I have no intention of making one any time soon. You may have to reach out to Cobb on this one, if it's vehicle-specific.
    AEM has full integration with ATR.
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    MAINEiac 11blackSTi's Avatar
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    Ok thanks for the info. The map I am getting is supposed to be designed to work with the Perrin intake, but we will see once I get the WBo2 sensor installed and what I am running for AFR. Also going to be installing a boost gauge as well. Pretty pumped to get all this installed!

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    Quote Originally Posted by zax View Post
    AEM has full integration with ATR.


    I was wondering how that works.. I'm assuming you still have to buy a serial->USB cable, how do you connect the WBO2 logging cable to the AP? It was simple enough with my laptop and RR, but I've always wondered what you do if you're on the Cobb train.

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    MAINEiac 11blackSTi's Avatar
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    It comes with a 0-5v analog output that supposedly works with data loggers and "virtually any engine management system."

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    Re: AFR gauge w/ WB o2 Sensor

    At least with the lc1, you can calibrate both analog outputs however you choose to scale them. I assume the aem has a similar option.
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    Quote Originally Posted by 11blackSTi
    The map I am getting is supposed to be designed to work with the Perrin intake, but we will see once I get the WBo2 sensor installed and what I am running for AFR.
    If you're referring to the Perrin AP map, I haven't been impressed with either that I've datalogged, neither of which suffered from a mechanical issue.
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