O2 Bung Location

[Bobby B]

Does anyone know where the best location is for an O2 bung for use with the LM-1 wide band tuner? I know it would be before the cats. I was just wondering if there is an ideal spot?
Thanks in advanced
:biggrin:

 

[Spyder327]

Does anyone know where the best location is for an O2 bung for use with the LM-1 wide band tuner? I know it would be before the cats. I was just wondering if there is an ideal spot?
Thanks in advanced
:biggrin:

i pretty much put mine as close to the factory o2 as it gets...(i have the JBA headers)

 

[jockin my styLez]

hah...just thought the title of the thread was funny :laugh:

 

[trd_sport]

I'm putting mine on the passenger side manifold on the opposite side as the factory sensor about an 1in foreward from the factory one. The best placement is between 10 and 2, dont put on the bottom and you should be in business.

 

[Bobby B]

hah...just thought the title of the thread was funny :laugh:

OMG! I never thought I would need to find a bung location. You see this is exactly why I love my XR so much. never a dull moment!
:laugh:

 

[project-c2]

:wink: For naturally aspirated. I would put it as close as possible to the cylinder head.

 

[Stevenredx]

:wink: For naturally aspirated. I would put it as close as possible to the cylinder head.

Thats what i have always heard too

 

[Jonathan]

:wink: For naturally aspirated. I would put it as close as possible to the cylinder head.

may i ask why you think NA / FI makes a difference? also, i am curious to see the logic behind having it as close as possible. i dont think the AFR is going to change much, unless you pass it through some cat. coverters?.

 

[project-c2]

may i ask why you think NA / FI makes a difference? also, i am curious to see the logic behind having it as close as possible. i dont think the AFR is going to change much, unless you pass it through some cat. coverters?.

Well with both I would still put it as close as possible to the head. No matter before the cat or after heat will "push" exhaust away as it cools. So even if there is a turbo on there I would put the bung before the turbo. I did it on my turbo Civic. One before and aft the turbo pretty close. Just from my experience. Plus too, I've only put widebands on full race NA wheere there is no exhaust restrictions (cat converters). That's what cats are, right, useless.LOL

 

[Jonathan]

i understand you said you want them close as possible, but you still didnt say why. an AFR gauge doesnt care how cool the gas flow is, to my knowledge.

 

[Stevenredx]

Yeah.... i just did a google and appears as long as its before the cat, you will get accurate readings :top:

 

[Bobby B]

Yeah.... i just did a google and appears as long as its before the cat, you will get accurate readings :top:

Thanks Jonathan, I'm going install it in the most easily accessible spot before the cats. Wanna help, me tune it?:biggrin:

 

[project-c2]

i understand you said you want them close as possible, but you still didnt say why. an AFR gauge doesnt care how cool the gas flow is, to my knowledge.

As the exhaust comes out, it gathers oxygen in the exhaust system. Therefore as the exhaust gets farther and farther down the system, it reads leaner. From what I understand. I don't know how much difference it makes on mild tune versus full race. When the header goes to in front of the front tire. We tried to make the location as close to the head as possible.

This is what I was told and I just do it like that, cause I haven't had a problem yet. Basically theories I've heard.

 

[Jonathan]

As the exhaust comes out, it gathers oxygen in the exhaust system. Therefore as the exhaust gets farther and farther down the system, it reads leaner. From what I understand. I don't know how much difference it makes on mild tune versus full race. When the header goes to in front of the front tire. We tried to make the location as close to the head as possible.

This is what I was told and I just do it like that, cause I haven't had a problem yet. Basically theories I've heard.

once again, not arguing that point (although i dont agree, maybe i just dont understand..) but, where is the oxygen its gathering come from? unless there is a leak somewhere, its a closed loop system pretty much..one way in..one way out. maybe it will read leaner, but, my lc1 read within .1 of the AFR as the dyno shop that installed a sensor at the tip when i dynoed (no cats).