The Ford Barn

Terry, NJ · 10-02-2017, 07:31 AM

I was wondering, Has anyone ever bored out a venturi ? I was thinking that maybe the stock venturi might be more of an obstruction than a help. In the original configuration, it was designed to handle the air mass for a for an engine that was 200.5 inches, that really didn't breathe too well. Most of today's engines are larger due to boring during rebuilding, have larger valves, better cams, and many are ported and polished. But i've never heard of anybody boring the venturi say, .020 or .030. I know how venturi's work (Bernoulli's princible) It's the same with an aircraft upper wing shape. But what works in one application, IS NOT correct in all applications. The purpose of a venturi in a carburetor is to speed up the air at that point. However, with the ability to breathe better (Cams, valves, etc) has the shape and size of the venturi become more of a choke point? Maybe a small opening up would help it.
Terry

10-02-2017, 07:31 AM	#1
Terry, NJ Senior Member Join Date: May 2010 Location: Bucks Co, Pa Posts: 3,749	Hey, I was wondering (Carburetors) I was wondering, Has anyone ever bored out a venturi ? I was thinking that maybe the stock venturi might be more of an obstruction than a help. In the original configuration, it was designed to handle the air mass for a for an engine that was 200.5 inches, that really didn't breathe too well. Most of today's engines are larger due to boring during rebuilding, have larger valves, better cams, and many are ported and polished. But i've never heard of anybody boring the venturi say, .020 or .030. I know how venturi's work (Bernoulli's princible) It's the same with an aircraft upper wing shape. But what works in one application, IS NOT correct in all applications. The purpose of a venturi in a carburetor is to speed up the air at that point. However, with the ability to breathe better (Cams, valves, etc) has the shape and size of the venturi become more of a choke point? Maybe a small opening up would help it. Terry