6 Pack vs. 650 4BBL?

It is true that "generally" a good tuned single carburetor will run better and out perform multiple carburetors.

That said, if you know how to properly tune a six pack, it is not true. The reason is because the center carburetor is a mechanical carburetor. It has its own accelerator pump and it is connected directly to the car's throttle linkage. When the accelerator pedal is depressed, the center carburetor opens. Not true of the outboard carburetors.

Both the outboard carburetors. are vacuum secondary units. They only open as the engine demands it. If properly tuned and adjusted, the six pack is nearly unbeatable. Do the math. You're talking about a 600 CFM carburetor and trying to compare it to an 1100 CFM six pack. Ain't happenin. Some people say they spec out at "only" 900 or so CFM. Even still, the six pack wins out heavily when properly tuned.

The keyword in all this is "properly".

As noted in a couple of posts here already, lots of racers use them. Lots of racers won using them. Lots of records have been made......and broken with six packs.

All of this said, the exact polar opposite can be true if you do not learn how to tune them. They can be your worst nightmare. If you really want to run one, find someone who has REALLY run them. Pick their brain.....BEFORE you buy a six pack. That way, you will know for sure it is is something you want to put that much effort into.