View Single Post
Old 04-15-2018, 01:24 PM   #1
Bob Bidonde
Senior Member
Bob Bidonde's Avatar
Join Date: May 2010
Location: Long Island, NY
Posts: 1,247
Default Zenith Carburetor CFM?

My speculation is the Model A needs to breath 100 CFM in stock form. I base this on the engine's volumetric efficiency.

100% Volumetric Efficiency means that the engine can breath its total displacement in one combustion cycle. So for 200 cubic inches, and assuming the "L" head engine has a 50% Volumetric Efficiency, the carburetor needs to be capable of 100 CFM

Does anyone know the CFM of the Model A's Zenith carburetor?
Bob Bidonde
Bob Bidonde is offline   Reply With Quote