Oversized Tillotson - what does it fit?

[mcgarrett]

Got this interesting, larger than normal Tillotson in a box of carburetors. Anyone out there know what cars it might fit? Has a 1 5/16" bore as opposed to the Model A version which is 1 1/8". Has an accelerator pump but does not have a GAV/choke mechanism - instead it uses a flexible choke cable. Possibly a replacement for the Zenith used on the Model B? I wondered if the intake manifold throat was bored out to match the bore of the carb would it work on a Model A. Would appreciate more information on what cars it was designed to be used on.

[Gary WA]

Originally Posted by mcgarrett

Got this interesting, larger than normal Tillotson in a box of carburetors. Anyone out there know what cars it might fit? Has a 1 5/16" bore as opposed to the Model A version which is 1 1/8". Has an accelerator pump but does not have a GAV/choke mechanism - instead it uses a flexible choke cable. Possibly a replacement for the Zenith used on the Model B? I wondered if the intake manifold throat was bored out to match the bore of the carb would it work on a Model A. Would appreciate more information on what cars it was designed to be used on.

Tractor maybe?

[rotorwrench]

The Tillotson JR1 was used on Chrysler products in the updraft era.

[Bob C]

What rotorwrench said.

[mcgarrett]

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Rotorwrench,
Thanks so much for that info! It will be up for sale at the next swap meet. Any ideas on years it was used - probably '20s and '30s ?