1.5 Ecoboost 2017 euro stoich

[Lammer]

Hi friends.
I'm new to tuning and recently bought MPVI3.
In the firmware I saw that the stoich is 14.36 as for E5 fuel. My area doesn't use ethanol.
Can I change 14.36 to 14.67 and continue using the car without any problems or need more adjustments in the firmware?
Thank you
1.5 ecoboost FV6A-14C204-TJ.hpt

[Lammer]

Want to improve fuel consumption

[Chickenbreast]

I don?t know how that ECU works, BUT I wouldn?t do that.
1. I guess the ECU makes its calculations based on that stoich: PE, Timings, Injection rate etc. Therefore I can imagine it maybe needs to be adjusted.
2. I am just asking myself, how much fuel saving are you expecting? 0,5L each 100km?

[Seishuku]

The stoich ratio parameter just gets the ECU into the ballpark for fuel corrections, it will still target a 1.0 lambda and use LTFT to get there regardless of what stoich AFR is set to.

[Lammer]

Thanks a lot, Ill try to find another way improve fuel consumption