a good rule of thumb guesstimate is to multiply the airflow by 0.85 and then multiply by 10.
However, since there is no maf sensor on the ecoboost engines and it's an algorithm, I would only takes this as a guess and use it for reference only.
For example, our tunes typically see around 50 air flow #/min. 50 * 0.85 = 43.231 * 10 = 432.31 hp
