Quote: So we go through this again: Twice in the same thread!
Two barrel carbs are rated at a 3 inch pressure drop across the carb. Four barrel carbs are rated at 1.5 inches of pressure drop. To convert from a two barrel rating to a four barrel rating you DIVIDE BY THE SQUARE ROOT OF TWO!!! That's 1.414... for those who don't have a calculator with a square root key.
1350 / SQRT2 = 955cfm.
1150 / SQRT2 = 813cfm.
etc.
R.
The thread is not done yet , we will probably go thru it a few more times.