Timely stuff, I was going to post a thread with a related question.
I can certainly get my head around the CFM calculation for engines. Reading Jon’s links, looks like 75% VE is the right number for our old 6 cyl engines? What should one use for the rpm piece?
Here’s my bigger question, can one back their way into a CFM rating for a carb with throttle bore and Venturi size? For instance, the Stromberg “BX” replacement carbs. I see them come up for sale. I can find charts that show Venturi and throttle bore. But haven’t yet figured out how to convert that into something useful. I think I can still do algebra, just can’t find the right formula.
