[T.B. Yoits]

What is the Max number of Carbs that could be put on the engine?

While in reality the max number is whatever the mad engineer wants to install, exceeding one per cylinder won't gain much for you.

Three two-barrel carburetors, two four-barrel carburetors, or eight single-barrel carburetors covered most racing setups prior to fuel injection.

[MikeSteelBe]

I was always a fan of 8 webers on a V8. This gives a similar performance advantage as early velocity stacks or modern tuned port injection, having one port per cylinder. Each cylinder has its own fuel/air supply and does not cross feed from other carb barrels. The fuel metering to each cylinder is precise and equal.

Most modern multi-cylinder motorcycles were made this way until computer controlled fuel injection came out. It can make better HP per displacement numbers than a 4 barrel carb feeding a V8, where the cylinders can’t get equally metered intake charges.

[ETL]

If not anything else, in my minimum-mechanical knowhow opinion, multiple carbs just looked cool as hell.

(cool as hell?)