Ok, just in from long work day/week, so maybe my brain isn't functioning right- I gave you a thumbs up then pulled out my calculator, and I'm still not getting it. I took "cfm" to be cubic feet per minute, which is a dynamic variable based on total engine displacement, independent of cylinder count. . So

**if **cfm= cubic feet of air ingested per minute this formula doesn't work: A 300 pulling 300 cubic feet of air/min =300 x .2575= 77.25 x 6 cylinders = 463 HP. A 300 can make 436 HP but not @ 4000 rpm and 300 cfm. ?? The 302 example you gave used the

**displacement** as a foundation, not cfm. .

None of this is criticism or challenging- I am wanting to understand, would love a new formula to add to my collection. I know more about engines from the math than from hands-on overhauls.