ECMlink Tuning E85 from which AFR reading?

[gofer]

I'm running the LinearWB so I can get my AEM WB to match up but I'm still having trouble with it...

I watched the gauge all the way to 6.5k to see what my AFR's looked like on the gauge and see how they compared to the logged AFR's in link. Watching the gauge it was anywhere from 11.5 ~ 11.9:1 doing this 3rd gear pull I have attached.
Since the LinWideband reads off of the Lambda values you input into it, I got mine to read spot on at idle but during closed loop or open loop driving the gauge is displaying one thing and link is logging another.
I started logging the RawLinWB and used the chart below to tune, rather than the actual logged LinWideband since its off and I can't trust it.
The problem I'm seeing now is that my RawLinWB voltage is showing that during that 3rd gear pull I was around a 12.1 ~ 12.8:1 but I KNOW the gauge never went leaner than a 11.9:1 AFR.

So what gives? I'm getting THREE different AFR values... What my gauge is actually displaying (11.5 ~ 11.9:1), what my LinWideband logged AFR is (11.2 ~ 11.9:1), & what my RawLinWB voltage thats being logged (1.02 ~ 1.37V = 12.1 ~ 12.8:1) AFR.

To say the least WTF?!? I was told that I SHOULDN'T trust the LinWideband AFR being logged in link, tune from the voltage thats being displayed as its raw value since thats not wrong... according to my logged RawLinWB voltages I'm right where I should be as far as AFR's go on E85.

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[95blackGsTurbo]

For any tuning you want to tune off of your wideband since that is a true reading of it not an estimate. Your "sweet spot" for tuning is going to be at the 12.5-12.8:1 AFR or 1.25-1.40V range. If your wideband was giving you a 11.1-11.9:1 reading I would go off of that and lean it out to get the targeted AFR.

 

[2gGSX]

Tune based on the gasoline conversion for simplicity's sake. Your true, chemical AFR is going to be between the "Gasoline AFR" and "Ethanol AFR", but for all intents and purposes just tune with the gasoline equivalent.

I can't really explain why the gauge is reading differently though.

 

[dsmmatt28]

If your using a aem wb you will need the buffer with the ecmlink. your readings will be off just a bit. http://www.ecmtuning.com/product_info.php?cPath=26&products_id=39&osCsid=i4k29t5polr6d67df27s4e8av3