Adding headers + O2

[BRD-PREY]

What do most of you do?
Install the wideband in the one bung and then use the 0 to 1volt output as a substitute for the factory o2 and 0 to 5 for tuner? Or do you just weld in a second bung and not bother with the 0 to 1 out?
thanks Ed
If you install a second bung and suggestions on where? I have QTP LT and Y-pipe for an 01 ws6

[mr.prick]

I welded the bung in the catback just under the passenger rear seat.
This way the exhaust from both banks flow past it,
I didn't like the wild fluctuation in AFR I got from having it in one side of the exhaust.

[tokymon]

that really depends on the wide band. I installed a second bung because i have a lm-1 and use it on several vechiles as it will log afr in it self.
Would to the same if you have lm-1 or lm-2.
guage type wide band or race car yes permant is stall is best
but really it's you choice

[BRD-PREY]

It will definitely be permanent. I have an LC-1 but I was thinking why not use the 0-1 vdc out of the LC-1 for the PCM and 0-5 vdc for the wideband. That would mean I could use the 2 existing bungs in my collectors and not have to weld a new bung on.
Ed

[waterbug1999]

I have mine on the passenger side "Y" pipe at 3 o'clock about 3" after the header..

I would have done it where Mr.Prick is talking about but I have duel cut outs, which are not completely air tight and would cause bad readings.

[BRD-PREY]

does anyone use the wideband to also feed the PCM?

[tokymon]

ya theres other that use lc-1 as the narrow band to if i rember correctly you use both the wires from the analog out put 0-1 volt and i would sugest you log serial into youre v2

[mr.prick]

does anyone use the wideband to also feed the PCM?

I'm sure some people use the simulated signal for NBO2 but
is it going to be a good match for GM O2 sensors?
The LC-1 manual says that analog #1 is pre-programmed for this
1.099 volts = 14.08 AFR / 0.958 LAMBDA
0.103 volts = 15.01 AFR / 1.021 LAMBDA

If you do this and difference between bank1 and bank2 LTFT is more than 2%,
then it's probably not a good idea.

[BRD-PREY]

My initial thoughts were to get a second LC1 and have a wideband in each header. This would then allow me to wire up both sensors to the PCM as well.

Probably overkill but I too have a cutout thats not air tight and I was also thinking that the closer to the cylinder the O2 is the less delay between whats read and actual, which would be more accurate on transitional throttle readings? right?
Ed

[mr.prick]

I doubt it's much more,
even the "slower" WBO2 controllers signal is pretty fast.
There will always be some lag, MAP will change quicker than exhaust will flow.
I can deal with a little lag but I couldn't stand the wild fluctuation I got from
having my WBO2 in one bank.
This was probably due to the cam.