[quote=carbking
The 228 carb has a 29 mm venturi and the 270 carb has a 33 mm venturi. Since area is a function of the square of the radius, there is a 29 1/2 percent increase in the airflow for the 270 carburetor.
The smaller venturi will actually run RICHER on the larger engine (up to a point). When that point is reached, the engine will starve for air.
Jon. [/quote]
ok, then here's what else i did but some time ago figuring how much could it hurt. i took a zenith off my 248 and put it on a 270 upgrade for my 51 350 firetruck. whats the difference here if you have the info? just curious.
