The car is doing great and is very consistent ,even in our 100 degree weather . It's currently running straight E85 on the stock fuel system and injectors . All datalogs show fueling is great and the timing advance is making great torque .
I have a friend who runs the MPT E85 tune on stock injectors and stock fuel system, and he has the same results. He has a 2013 mustang v6.
14.7:1 Idle/Cruise & 12.8 WOT for n/a cars. Both are conservative but imho 12.1 WOT makes a lot more sense than 11.8. That's at the door (not quite) of FI numbers imho. I'll have to agree with your local tuner. Also when it comes to tuning, it's not really good to be focused purely on numbers/graphs as the same car with the same setup + tune can make different numbers than the other car. At the end of the day it's the guy who does the most datalogging + due diligence that will get optimal results. As always YMMV.
There's only the right tune or the wrong tune. Those driving modes iirc only change steering feel (maybe shifting on the auto). I never understood the need to constantly swap between tunes (unless you're datalogging to get the most optimal tune). Unless you're adding mods or having issues; after datalogging your tune should be "set it and forget it" just like your OE tune. Any tune should net you better MPGs over stock if done correctly.
