[Power Surge]

Originally Posted by MrMagoo

Also this, from "Holley Carburetors, Manifolds and Fuel Injection" by Mike Urich and Bill Fisher, page 25:

Because the fuel bowl is maintained at near atmospheric pressure by the vent system, fuel flows through the main jet and into the low-pressure or vacuum area in the venturi.

Yeah, that's the main principal behind a venturi style carb. The venturi creates a low pressure point in the bore, and the booster accellerates the signal. Fuel is drawn into the bore from vacuum on one side, and "pushed" from the other side by atmospheric pressure.

I guess I misunderstood what you were responding to, I thought you meant that the vents could compensate for a mismatch in fuel pressure between the bowls.