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Old 03-25-2009, 03:21 PM   #1
formula91
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Default 4EAT - Where did you weld your bung for wb02 sensor?

I just got my LC-1 today, and I'm looking for a good spot to weld the bung.

Unfortunately, the 4EAT is quite a bit larger than the 5MT and there is little space to place the bung.

I don't know how to weld myself, and I don't know anyone else who does, so I went to the exhaust shop and they told me that they couldn't do it because they did not want to risk damaging the cat if they made a hole a little before or after the front O2.

I asked if they could weld a hole right before the gasket in the header and they said they couldn't do it from a 10-2 o'clock (recommended spot to put wb02 according to the manual) because they didn't want to risk damage to the header or engine.

I was looking for a spot and everything looks very tight in terms of space, but I'm sure there's a way I could get a wbO2 on right next to the front O2.

Any suggestions?
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Old 03-25-2009, 07:11 PM   #2
RaceFaceXC
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get the car off the ground... open the hood to get some light in there... get under the car and find a spot between 10/2 o'clock and measure to make sure there is room to install/remove the sensor, not just enough room for it to be in the pipe. The closer to the cat the better. On a stock 05 system, i think you might be able to fit it in right at the 90 degree bend before the cat. I put mine there, but it was also an aftermarket cat pipe and I have 5MT. The factory heat shield will have to be modified if you want to reuse it obviously. the best part is that i can remove/reinstall the WBO2 sensor through the hood, instead of having to raise the car every time I want to recalibrate. that is definitely something to consider
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Old 03-25-2009, 07:41 PM   #3
formula91
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Originally Posted by RaceFaceXC View Post
get the car off the ground... open the hood to get some light in there... get under the car and find a spot between 10/2 o'clock and measure to make sure there is room to install/remove the sensor, not just enough room for it to be in the pipe. The closer to the cat the better. On a stock 05 system, i think you might be able to fit it in right at the 90 degree bend before the cat. I put mine there, but it was also an aftermarket cat pipe and I have 5MT. The factory heat shield will have to be modified if you want to reuse it obviously. the best part is that i can remove/reinstall the WBO2 sensor through the hood, instead of having to raise the car every time I want to recalibrate. that is definitely something to consider
I remember reading your supplementary guide for installation. It was really helpful, but I can't do squat if I can't find a spot.

I might just ditch the heat shield, is that bad?
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Old 03-26-2009, 01:47 AM   #4
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Mine is on a 90 degree bend before the cat. I just ditched part of the heat sheild, haven't had any problems also I welded it down so it wouldn't rattle. Make sure you get it before the cat so you will get a proper reading.
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Old 03-27-2009, 12:11 AM   #5
formula91
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Of course, thanks for the help.

The exhaust shop thought the whole front section was a cat. Obviously not!

-edit--

But you are an 06, I thought the exhaust system completely changed after 05.

I'm not sure if the cat sections are the same.
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Old 03-27-2009, 12:41 AM   #6
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Did anyone ever play with an O2 sensor extension with a wideband just to see if it gets a different reading? I was always curious how that would change a wideband's readings like it "fools" O2 sensors on trackpipes.
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Old 03-27-2009, 01:37 AM   #7
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I thought wb02 sensors couldn't be connected to the ECU because of some wacky polynomial no one figured out yet.
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Old 03-28-2009, 01:39 PM   #8
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I remember reading your supplementary guide for installation. It was really helpful, but I can't do squat if I can't find a spot.

I might just ditch the heat shield, is that bad?
potentially yes.. i would at least try to modify the heat shield to protect your CV boot on that side. At the least, cut out just enough to make the O2 sensor fit.

Quote:
Originally Posted by formula91 View Post
Of course, thanks for the help.

The exhaust shop thought the whole front section was a cat. Obviously not!

-edit--

But you are an 06, I thought the exhaust system completely changed after 05.

I'm not sure if the cat sections are the same.
yes, after 05 they completely changed design/route before the midpipe. maybe he is referring to an aftermarket setup he has.
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Old 03-28-2009, 08:33 PM   #9
formula91
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If anything I'll just put them on the headers if everything else fails.

But I hate getting new gaskets. Blah.
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