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Best Placement for O2 Bung?

Posted By: JonsGottaDusta

Best Placement for O2 Bung? - 02/23/09 10:37 PM

Hey Everyone,
I am putting an 02 Sensor on my car and was wonder where it will give me the most accurate reading? I was thinking in the header collector, but wasn't sure. Let me know.

- Jon
Posted By: WILD BILL

Re: Best Placement for O2 Bung? - 02/23/09 10:49 PM

If I'm not mistaken I think most people put them in the collector.
Posted By: dthemi

Re: Best Placement for O2 Bung? - 02/23/09 11:27 PM

If the headers are not multiple piece, or slip on collector put it in the collector, just not in the 6 o'clock position. Any air that leaks in at slip joints will throw your reading way off, so if it's pieces put it in the lower part of a solid tube. and use that one cylinder as a guide. One piece headers are best for collector installs.
Posted By: MR_P_BODY

Re: Best Placement for O2 Bung? - 02/23/09 11:35 PM

In the collector... 3 oclock or 9 oclock so it doesnt
hold water, in front of the evac (up stream) if using
one but try to get it in the flow of all the tubes
for the best average reading, like was said slip on
collectors can cause air leaks and give a false reading
Posted By: hemisurfer

Re: Best Placement for O2 Bung? - 02/23/09 11:44 PM

It should be placed in your bung hole.
Posted By: JonsGottaDusta

Re: Best Placement for O2 Bung? - 02/24/09 01:18 AM

Quote:

It should be placed in your bung hole.




Funny "Best Placement for O2 Bung?"

Shoulda read the title.

I was wondering about the position, so thanks. These are 1 piece headers, and I am putting in a wideband. Thanks guys.

-
Posted By: Bill MeLater

Re: Best Placement for O2 Bung? - 02/24/09 01:23 AM

Enough can't be said for stating the obvious...Three thumbs up
Posted By: JonsGottaDusta

Re: Best Placement for O2 Bung? - 02/24/09 01:28 AM

Quote:

Enough can't be said for stating the obvious...Three thumbs up




Are you related to "flypaper"? You sound exactly like him... +3

Posted By: 70sixpkrt

Re: Best Placement for O2 Bung? - 02/24/09 01:32 AM

Anybody have pics? Is it best to have two(1 in each header) or will 1 be sufficient?
Posted By: JonsGottaDusta

Re: Best Placement for O2 Bung? - 02/24/09 01:45 AM

Quote:

Anybody have pics? Is it best to have two(1 in each header) or will 1 be sufficient?




I was also wondering if one is good enough or not.
Posted By: MR_P_BODY

Re: Best Placement for O2 Bung? - 02/24/09 01:50 AM

I just run 1... cant affort 2 wide bands. I make a
pass with it in 1 side then flip it to the other side
for the next pass... if all is well, I pull the sensor
and plug it
Posted By: dthemi

Re: Best Placement for O2 Bung? - 02/24/09 01:50 AM

You have to look close, but you can see both mine near the tranny pan.
Posted By: hemisurfer

Re: Best Placement for O2 Bung? - 02/24/09 04:40 AM

Agreed one for each side, run one side one pass then the next side. Lots of things can cause a need for jet stagger from side to side (intake/heads etc). I run mine at 9 and 3 O Clock on both sides. The car is street/strip so rather than mount it in the header I mounted it in the collector/reducer. I believe I read somewhere that the 02 sensor needs to reach a certain operating temp to work correctly, so put your bung hole as close to the collector as possible. Funny thread ...
Posted By: MR_P_BODY

Re: Best Placement for O2 Bung? - 02/24/09 04:49 AM

Quote:

Agreed one for each side, run one side one pass then the next side. Lots of things can cause a need for jet stagger from side to side (intake/heads etc). I run mine at 9 and 3 O Clock on both sides. The car is street/strip so rather than mount it in the header I mounted it in the collector/reducer. I believe I read somewhere that the 02 sensor needs to reach a certain operating temp to work correctly, so put your bung hole as close to the collector as possible. Funny thread ...




Most O2s now days have there own heaters
Posted By: hemisurfer

Re: Best Placement for O2 Bung? - 02/24/09 04:53 AM

I did not know that, thats what happens when you get past 40; info over load. In that case I guess you could put your bung hole anywhere.
Posted By: MR_P_BODY

Re: Best Placement for O2 Bung? - 02/24/09 05:08 AM

If you look at how many wires it has, 4 or more wires
was a heater(the old single wire O2 didnt have a heater)
Posted By: Cab_Burge

Re: Best Placement for O2 Bung? - 02/24/09 06:24 AM

I have mine in the exhaust pipe(street car) just after the collector on the full exhaust and another set in the colletor extensions for at the track testing with open headers, no difference in readings between the two I started out with a LM1 and then bought a FAST system with the dual wide band reading, I have since bought the LC1 upgrade for the LM1 do to its data logging and transferring ability which the FAST system does not have Thank twice and avoid buying twice
Posted By: cudadon

Re: Best Placement for O2 Bung? - 02/25/09 03:14 AM

Here's where I have mine. Yes they are multi piece headers and slip on collectors and turndowns (where the bung is now)
I want your opions on where it SHOULD be please. Thanks, Don

Attached picture 5051031-DSC00100.JPG
Posted By: aarcuda

Re: Best Placement for O2 Bung? - 02/25/09 03:25 AM

i have mine in a small section of pipe at 10 oclock just after the collector/reducer
Posted By: RobX4406

Re: Best Placement for O2 Bung? - 02/25/09 04:02 AM

Quote:

i have mine in a small section of pipe at 10 oclock just after the collector/reducer




You done with that thing yet?

Don't run the O2 sensor unheated, you'll toast them quick.
Posted By: aarcuda

Re: Best Placement for O2 Bung? - 02/25/09 04:12 AM

i'll have it back to you in about 3 weeks. I have the intake off right now and will be putting it back on this weekend. I figure the track will be open in 3 weeks and I'll get some runs in with it (i added a 50cc pump to cure the lean condition as I stomp on the pedal- hopefully it works).

but ya, I know- NO RUNNING THE ENGINE WITHOUT THE
METER HOOKED UP (or the sensor removed)
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