[Mach828]

In closed loop I think it looks at the field were you can adjust the desired stoich. I think my stock value was 14.67 and I changed to ~14.1 for e10. Its the value you have to change for running different fuel besides pure gasoline, i forget the exact name. Then it uses that as a reference to determine closed loop fueling and then as a reference for the commanded lamba for open loop. So in theory, if this value is 100% accurate for my base 91 e10 tune and then I adjust it to the true stoich for my e85 tune, then the only thing I need to change for my e85 tuning would be the timing tables? I'm sure it won't be entirely perfect and I will need to fine tune, but this is just in theory.