I am restoring a Zenith carburetor for a 1930 International Harvester truck. There are, of course, no restoration parts available for this carburetor --- at least none of which I am aware.
The pot-metal venturi is crumbling, as are most early castings made with too much lead in the die-casting mixture. Its dimensions are:
[b:60bd4eaede]I.D .789" or about 25/32"
O.D. 1.87" or 3/16"
Length: 1.50" or 1/2"[/b:60bd4eaede]
My initial thought was to use a Model A Ford venturi, but that turns out to be incompatible. Even if I turned down the external diameter and shortened it by about 3/8", the restriction is 1/16" too large.
Sooo . . . I thought about tractors. They have smaller venturi restrictions and I wondered if any of them might be adaptable to the I.H. truck. [b:60bd4eaede]Does anyone know of a table that exists showing tractor venturi dimensions? Any other suggestions of a venturi application to check out? [/b:60bd4eaede]
I'd publish a photo, but it wouldn't show you anything other than a deteriorating pot-metal sleeve.
Jeff Dreibus
Nebo, NC
The pot-metal venturi is crumbling, as are most early castings made with too much lead in the die-casting mixture. Its dimensions are:
[b:60bd4eaede]I.D .789" or about 25/32"
O.D. 1.87" or 3/16"
Length: 1.50" or 1/2"[/b:60bd4eaede]
My initial thought was to use a Model A Ford venturi, but that turns out to be incompatible. Even if I turned down the external diameter and shortened it by about 3/8", the restriction is 1/16" too large.
Sooo . . . I thought about tractors. They have smaller venturi restrictions and I wondered if any of them might be adaptable to the I.H. truck. [b:60bd4eaede]Does anyone know of a table that exists showing tractor venturi dimensions? Any other suggestions of a venturi application to check out? [/b:60bd4eaede]
I'd publish a photo, but it wouldn't show you anything other than a deteriorating pot-metal sleeve.
Jeff Dreibus
Nebo, NC