Panic - glad you chimed in.

For those who have not seen it, panic has a wonderful description of intake manifolds, I send customers there frequently. For those do have not read his article, I urge you to do so:

Panic's intake manifold comments

Again, mathematics and physics are your friends.

And to take Panic's comment about the CFM equation one step further: that equation is for a 4-stroke multi-cylinder engine of AT LEAST 4 CYLINDER. As Panic mentions, it is for carburetors on a single manifold. Using multiple manifolds (or an individual runner style) forces one to use the equations for engines of less than 4 cylinders.

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop