The Ford Barn

Ron_r1959 · 04-11-2023, 06:43 AM

Does anyone know how the venturis are measured? I assume it is at the top of the venturis passageway before it gets bigger. I am a little curio about the math that is involved there between the venturis and the throttle plates and if I could recreate it a little bigger?

51 MERC-CT · 04-11-2023, 07:12 AM

At the smallest dia.

ford38v8 · 04-11-2023, 08:50 PM

I wouldn’t mess around with your Venturi. If you want a bigger Venturi, get a bigger carb. They are out there.

Ron_r1959 · 04-12-2023, 12:02 PM

Where,s the fun in that lol

38 coupe · 04-13-2023, 05:34 PM

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For all the bad press carburetors get from the fuel injection crowd these days they are actually a very precise design. If you go modifying the fundamental design element the rest of the carburetor systems are designed around (the venturi) you need to know how to modify everything else to compensate. A simple jet change isn't going to get good overall operations when you do big modifications. Please do not use racing carburetors as guidance unless you are racing, driveability is not a concern when you are only tuning for wide open performance.

04-11-2023, 06:43 AM	#1
Ron_r1959 Member Join Date: Aug 2021 Posts: 78	Carb venturis Does anyone know how the venturis are measured? I assume it is at the top of the venturis passageway before it gets bigger. I am a little curio about the math that is involved there between the venturis and the throttle plates and if I could recreate it a little bigger?

04-11-2023, 07:12 AM	#2
51 MERC-CT Senior Member Join Date: May 2010 Location: East Hartford, Ct Posts: 5,898	Re: Carb venturis At the smallest dia. __________________ DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES

04-11-2023, 08:50 PM	#3
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 6,646	Re: Carb venturis I wouldn’t mess around with your Venturi. If you want a bigger Venturi, get a bigger carb. They are out there. __________________ Alan

04-12-2023, 12:02 PM	#4
Ron_r1959 Member Join Date: Aug 2021 Posts: 78	Re: Carb venturis Where,s the fun in that lol

04-13-2023, 05:34 PM	#5
38 coupe Senior Member Join Date: May 2010 Location: South Texas Posts: 1,631	Re: Carb venturis Sponsored Links (Register now to hide all advertisements) For all the bad press carburetors get from the fuel injection crowd these days they are actually a very precise design. If you go modifying the fundamental design element the rest of the carburetor systems are designed around (the venturi) you need to know how to modify everything else to compensate. A simple jet change isn't going to get good overall operations when you do big modifications. Please do not use racing carburetors as guidance unless you are racing, driveability is not a concern when you are only tuning for wide open performance.