$OD .adx WBO2 change?

[babywag]

For anybody familiar with working w/ .adx files...

Currently the file converts the 0-5v output to AFR.
What would one plug into the conversion to change this to display lambda?
Right now I'm just dividing by 14.7, but seems to be unnecessary.
It's being converted twice that way...

I'm not the greatest w/ math LOL.

So WB controller output is scaled 0v=10.0 and 5v=20.0
Conversion line = X * 0.039063 + 10.000000
I changed it to (X * 0.039063 + 10.000000)/14.7
This works, but seems like there would be a better way?

[EagleMark]

0V = 0.50 Lambda and 5V = 1.50 Lambda.
Lambda of 0.50 to 1.50 is a difference of 1.0 divided by 256 = 0.00390625

Lambda .50 to 1.50 with 1.0 being Lambda. Conversion: X * 0.00390625 + 0.500000

I sanity check by having three values for same data, one AFR, two WB voltage and three Lambda. At 2.5 volts should be 1.0 Lambda and 14.7 or 14.1 AFR depending on your WB controller if it can be set to anything but 14.7 AFR.

Some WB controllers can not be adjusted, so 14.7 is Stoich. Narrow band O2 sensor adjusts to Stoich, so Lambda is always correct.

[babywag]

0V = 0.50 Lambda and 5V = 1.50 Lambda.
Lambda of 0.50 to 1.50 is a difference of 1.0 divided by 256 = 0.00390625

Lambda .50 to 1.50 volts with 1.0 being Lambda. Conversion: X * 0.00390625 + 0.500000

I sanity check by having three values for same data, one AFR, two WB voltage and three Lambda. At 2.5 volts should be 1.0 Lambda and 14.7 or 14.1 AFR depending on your WB controller if it can be set to anything but 14.7 AFR.

Some WB controllers can not be adjusted, so 14.7 is Stoich. Narrow band O2 sensor adjusts to Stoich, so Lambda is always correct.

So to repeat my question, what would the .adx conversion line be for a math challenged individual to display lambda vs. AFR?
X * 0.00390625 + 0.500000 ???

[EagleMark]

Yes.

0V = 0.50 Lambda and 5V = 1.50 Lambda.
Lambda of 0.50 to 1.50 is a difference of 1.0 divided by 256 = 0.00390625

Lambda .50 to 1.50 volts with 1.0 being Lambda. Conversion: X * 0.00390625 + 0.500000

I sanity check by having three values for same data, one AFR, two WB voltage and three Lambda. At 2.5 volts should be 1.0 Lambda and 14.7 or 14.1 AFR depending on your WB controller if it can be set to anything but 14.7 AFR.

Some WB controllers can not be adjusted, so 14.7 is Stoich. Narrow band O2 sensor adjusts to Stoich, so Lambda is always correct.

Unless I'm not understanding what " to display lambda vs. AFR?" means?

You already have AFR based on 0-5 volts and 10-20 AFR, so make another value for Lambda, same as AFR, except the conversion.

[babywag]

Yes.



Unless I'm not understanding what " to display lambda vs. AFR?" means?

You already have AFR based on 0-5 volts and 10-20 AFR, so make another value for Lambda, same as AFR, except the conversion.

I think you got it right, I just didn't know how to do the math...
I just want lambda displayed/logged/etc., I don't want AFR displayed/logged.
Makes life easier because it's already the conversion factor.
My WB displays lambda, I calculate corrections based on lambda, no need to see/deal with AFR.
Easier to just use lambda, but the .adx was set-up w/ AFR.

[babywag]

I just tried it....seems off ~.1 vs my WB?

I'm using an Innovate MTX-L configured for 0v=10.0 / 5v=20.0
I double checked the WB config, and TunerPro is displaying ~.1 lower than the display.

[EagleMark]

There's so much that can go wrong with WB, mostly do to grounds of EFI system and grounds of WB. But can also include reading to gauge which is same if you use serial port but differant if you use AD1 or AD2.

That is why I said originally I make three values, 1. WB AFR, 2. WB Volts, 3 WB Lambda. All three have to match, then match my gauge as well... if the three to ECM/PCM match and my gauge is still off it's usually a ground. Gauge grounds through WB, AD uses ECM/PCM.

I've seen in instructions for Innovate products that there are several new versions on the LM Programmer, but still the website has the old version to download. Which version do you have? I'm still on 3.32, but 3.29 looks to be easier to set up.