doesn't that formula assume 100% efficiently? not even a race motor is 100% efficient. lucky if a street motor is 85% efficient which is why bigger carbs then what that formula gives work so well.
That formula works best when you determine what application you're going to use the vehicle for. In a drag vehicle, the RPMs at WOT should be used. In a street vehicle, normal RPM range should be used. Also with that formula, you normally round up to the next largest off the shelf size carb.
Hell, many nascars have 750 horsepower and spin between 8,000 and 9,000 RPM for 500 laps and they run a 390cfm carb.
But like I said, I don't know everything and most of what I know is from reading about how/why carbs work the way they do. You guys have a lot more experience with this than I do and if the practical application works better than the theoretical, awesome. Honestly, I'm not trying to be an a$$ or disrespectful to anyone here. Not trying to troll or jump threads, just trying to learn like everyone else. I do appreciate the lessons and it even helps me learn more. Thanks.