DanKZ71

My wideband is calibrated for a stoich of 14.1.

Will my starting point, say 12.0:1, be rich enough with E10?

Or, if the wideband is adjusted for E10 will the typical 12.5-13.0 still be the likely afr the engine wants per the guage?

I think what throws me off is the new stoich. Going to lambda...trying to wrap my mind around something unfamiliar, would the lambda be the same for the two best power afr's with e10 and pure gasoline?

outkast6991

iTrader: (34)

my understanding is lambda is stoich for any given fuel. that means that .85-.87 lambda would be a good starting point for wot. i'm just learning to tune and made the choice to use lambda for that reason( different fuel types)

Rhino79

iTrader: (7)

What year pcm? Is there provision in the file for ethanol detection? Some people set that table to a flat number like 14.32 for e10.

kenp

iTrader: (9)

12:1 is rich enough as a starting point. 13:1 might be a bit to the lean side with E10 and your wideband and tune set to 14.12 for stoic.

Exidous

iTrader: (11)

So in the PCM we should set it to 14.12 rather than 14.6-7 if running E10?

Atomic

iTrader: (37)

Ive found 14.42 to work quite well for e10, but it varies by region and time of year. If you want to see where stoich is with any fuel on a gas scale....go drive around with fuel trims on and look at the wideband. The narrowband o2s always force fueling to lambda=1, no matter the fuel. For gasoline lambda=1 is about 14.67 on a gas scale (ie, a wideband calibrated for gasoline), for e10 around 14.42, for e85, around 9.3, etc.

Exidous

iTrader: (11)

That would makes sense why my WB would always show a little richer than what my NB's were pushing with the LTFT's. The WB would show 14.4-5 and the commanded would show 14.63 as that's what I have stoich set at in the PCM.