Thoughts On Fuel Distribution Dams (Intake Manifold)

There's a reason why carbs for oem intakes have booster tangs and that's to improve distribution. From memory one study showed a 7 point afr spread between the highest to lowest cylinders.

Here's a study where they separated wall film (fuel deposited on the walls) and the mixture that makes it to the cylinders:

An Investigation of the Liquid Petrol Wall Film in the Manifold of a Carburetted Spark Ignition Engine: Effect of Carburettor and Manifold Geometry on Wall Film Quantities, Engine Performance and Emissions | Semantic Scholar

Here's what they found:

"Removal of the wall film yields a significant reduction in the emission of unburned hydrocarbons and virtually eliminates cycle-to-cycle variations of pressure in the engine cylinder."

Now think about what happens when one cylinder fires at 10-1 and another fires at 17-1? How long does it take for the cylinder to recover from a lean or rich miss fire?

Lots to think about.