The weather has not allowed me to test any changes, so until then, I wanted to discuss this chart. Every since Spring when I installed the sensor, I have been tuning to get my WOT at the 12.6/12.8 range while thinking that 14.7 was my stoich target. Then I read this chart and I am running 10% Ethanol.
It appears that I should be aiming for 12.2 WOT and thinking that 14.1 should be my stoich (Neutral/In D target) which is allot closer to what my engine wants versus the 14.7 target.
It appears that I need to rethink my tuning by .5 A/F or so. I will still tune to what the car wants but this chart makes me rethink my numbers just a tad, especially my WOT target.