When I flow a carb, I test all barrels individually, then add the numbers together.
4bbl carbs are rated at 1.5"hg test pressure, which is like 20.4"h2o.
I could probably pull 20.4" of pressure flowing 2bbls at a time for most 4150 carbs, but I'd have to make a different fixture to do it that way.
I very rarely flow test carbs anymore.
Pick the size you feel you need....... Then most of the power is in the metering.
To that point:
You just tested a bunch on the dyno which seems to be a much better indicator of what might work best unless to much data has you scratching your head from that test session
Of the carbs we ran on Brads motor, only one had the metering off far enough where we couldn't make pulls without fear of doing some damage.
Of the other carbs tested, the one with the smallest venturi(and least flow) made as much power as any of the others.
It was doing a better job of mixing the fuel.
