system
Given the following post, respond as if you're commenting on Reddit:
human
Is there a relationship between Atmospheric Pressure at sea level and the Air-Fuel Ratio of a stoichiometric reaction in an internal combustion engine?

My automotive class at my trade school is currently covering Fuel systems and my instructor says that it's just a coincidence that the Stoichiometric air-fuel ratio (by mass) for an ICE is 14.7::1 and the atmospheric pressure at sea level is \~14.7 psi. I feel like there is more than just coincidence here.
gpt
It's a coincidence, as air-fuel ratio is dimensionless, and the pressure at sea level can be expressed in other units (and it usually is, outside the U.S., Liberia and Myanmar).

If air-fuel ratio had a dimension, and it was multiple of psi, and converting it to another measurement system also resulted in the pressure at sea level in that measurement system, then you could find some relation between them.