stol wrote:
Most throttle body/carbs mass airflow sensors are rated in CF,,.Cubic
feet per minute. In therory a 360 cu in motor at 2500 rpm will breath
the same amount of air as 180 cuin one at 5000.

Something to muddy the waters, a carburettor's cfm rating is basically
how much air is able to flow through it for a given pressure difference.
The problem is that given pressure difference is different, ISTR, for
4 barrel carburettors than 1 and 2 barrel, I don't really know what the
convention is for throttle bodies, and I don't really know if the
convention is different for aircraft engines.

Sorry, I'm not much help