dual widebands, what do you guys see bank to bank?

[WS6FirebirdTA00]

Just curious what you guys are seeing bank to bank on your cars with the WB? Part throttle low load and WOT.

[vuss383]

On seeing this thread it has saved me starting a new one on the dual WB sensors .
Just wondering if anyone has yet tried the FAST Dual Wideband & what results they are getting ?

[WS6FirebirdTA00]

the problem is we dont have a way to adjust bank to bank, but we can see the difference at least, I just want to know what is typical.

[vuss383]

In reading the data & settings on the FAST , they say that it can be set to average between the 2 banks . Would this not be a better way to tune then just using 1 bank ?? The reason why i'm asking is that I am seeing a difference of .5 Afr between my Dynojet WB & the Motec that is used on most dyno's over here ! This has lead me to believe the Dynojet WB may not be all that good & when you run OLSD you want the fueling to be spot not within . 5 .

[MNR-0]

The Dynojet doesnt have free-air calibration - a must for any half decent WB monitoring system. Ive upgraded to the Daytona Sensors WEGOII unit (dual channel) - not installed yet (engine off-road).

I have found that too - DJ metering 0.3-0.5AFR too lean. At idle they are way off - but I guess you need to spend big $$$ to get a decent sensor so its a compromise. The LSU4.2 UEGO sensor is used by the WEGOII unit I have, and I checked my old DJ and it used the same sensor. I can only put it down to lack of free-air calibration.

[WS6FirebirdTA00]

If you have one bank running 0.5 leaner, you want to tune to the lean bank, unless you want to chance frying something. That is my opinion at least.

[alanderson1978]

If you have one bank running 0.5 leaner, you want to tune to the lean bank, unless you want to chance frying something. That is my opinion at least.

I would tune based on the leaner bank also. It would be cool to be able to look at both banks.
PLX does not have a calibration procedure that I am aware of. I heard form someone on here (Bill?) that the sensor itself has a calibration resistor.

[highoctaine]

2003 C-5 Z06 lgm no cats / borla stingers / slp blackwing cold air / 160* thermostat
F.A.S.T dual wideband

Running dual F.A.S.T wideband bank 1 is leaner than bank 2 no load, WOT both bank 1 and bank 2 are about the same the numbers still swing.
I've been told if the VE table is not smooth you will get a fluctuation with any wideband sensor is this true?
Does this happen because the VE numbers swing up and down so the idle and A/F ratio numbers will also swing?
I've been told not to tune the VE table just the MAF. What is the correct way?
Should the actual A/F reading be rock steady?

[WS6FirebirdTA00]

There, back to the thread lol