W/b 02 Bunge

[CHEVROLADE]

I Got The W/b Gauge Kit In,would It Be Ok If I Welded The 02 Bunge After The Flange Before The Muffler?
Or What Would Yall Recommend To Get The Best Reading-?

[skeet]

arent your rear o2s deleted, if so just put the wideband there

[CHEVROLADE]

arent your rear o2s deleted, if so just put the wideband there

yea but then it wouldnt be getting an accurate reading,only from one side.i think im gonna put it after the flange,cause it would be a biatch to weld before the flange.this way i can unbolt it ,weld it,then install back>just wanted to see if anyone has it ran like that.

[farmtruc]

Ideally, both sides of the engine will run the same a/f ratio. So, it's ok to locate the wb sensor on one side, plus it's easy cause the bung is there.

If you put the sensor after the Y where both sides join, you're still in a situation.
Now you're tuning a/f ratio collectively. Say one side is 11.5 and the other is 13.5, but you've tuned for a 11.5 target a/f ratio. You'll never know unless you run two widebands or swap it back and forth.

Just use the extra bung that is there and you'll be ok.


Also, let me know what the a/f ratio is, we'll get it dialed in.

[GasGuzzler]

1st hibbits and now bunges?

[CHEVROLADE]

Ideally, both sides of the engine will run the same a/f ratio. So, it's ok to locate the wb sensor on one side, plus it's easy cause the bung is there.

If you put the sensor after the Y where both sides join, you're still in a situation.
Now you're tuning a/f ratio collectively. Say one side is 11.5 and the other is 13.5, but you've tuned for a 11.5 target a/f ratio. You'll never know unless you run two widebands or swap it back and forth.

Just use the extra bung that is there and you'll be ok.


Also, let me know what the a/f ratio is, we'll get it dialed in.

Thanks ALLEN,i didnt know that both sides would read the same,ill go ahead and remove the passenger rear o2 and install the w/b o2 there.this is going to save me some time.
ill let you know asap what my a/f ratio is tomorrow.
thanks again.

[George C]

proper placement of the WB02 is 6-8inches from the driverside header collector!!!!! the driver side is bank one and is the first bank for the pcm to read.

also anything past 8" and youll get a leaner reading and would be basically pissing in the wind.

as for angle of WB02 anywhere from 9oclock to 3oclock nothing below that!!! you dont want moisture settling on it


again reading both banks is worthless and will cause you to run leaner then desired.

[GasGuzzler]

The PCM does not "look at bank 1 first"....at least I have never had any training of the sort, no mention whatsoever, and no diagnostic strategy put forth that says so.

I have even had "tuners" tell me LTFT's are averaged together for both banks in which I called BS. There's an LTFT1 and LTFT2 as well as STFT1 and STFT2. They are not averaged across the engine (look at B1 injector PWM vs. B1) like some think. There are a millions parameters in the architecture.

I can agree with the rest of the advice in the other posts. Good tip on clocking too, Quik....don't want silicon, water, or ethylene glycol contamination of the O2's.

[George C]

The PCM does not "look at bank 1 first"....at least I have never had any training of the sort, no mention whatsoever, and no diagnostic strategy put forth that says so.

I have even had "tuners" tell me LTFT's are averaged together for both banks in which I called BS. There's an LTFT1 and LTFT2 as well as STFT1 and STFT2. They are not averaged across the engine (look at B1 injector PWM vs. B1) like some think. There are a millions parameters in the architecture.

I can agree with the rest of the advice in the other posts. Good tip on clocking too, Quik....don't want silicon, water, or ethylene glycol contamination of the O2's.

motor does see bank 1 first. and it does read off both banks for fueling unless you wipe out the trims and run souly off wideband which i do.

i had an issue where bank 1 was getting a fresh air source and bank 2 was getting proper and it was causing all kinds of fueling issues. so yes they run off both banks for trims. now a dumbass computer like my 99 blazer it only uses one trim

[GasGuzzler]

I totally AGREE they run off both banks. That was my point. Seeing one FIRST still boggles me, dude.