I agree that formulas and text books are just a starting place. As an example, on my 7200 RPM Ford 300 bracket motor I have tried (3) 350 Holleys, (3) 350 Holleys taper-bored to use 500 base plates, (3) 500 Holleys, and (3) 500 Holleys modified and blueprinted to flow 540 cfm each. Each time I increased carb size the car ran quicker. Some racing buddies who run one of the factory Ford billett aluminum racing heads (8900 RPM) are looking at three Dominators split in half to try. Textbooks would say we are crazy.
Maybe we are, but not crazy enough not to use what works.
