Rebuilding early holley?

[JD 1931]

In process of restoring an double venturi Holley carb. and need to know if the inverted cap jet was used? The one that has the indented opening first on thread side. I haven 2 of these in my collection. I was able to save the original double venturi. Thank you, JD

[Tom Wesenberg]

That's how my double venturi is. There was a recent thread on this very subject.

[RonC]

The January Ford Service Bulletin shows this jet information for the early carburetor

[Gary Karr]

The early double venture carbs should us the #19 cap jet that has the orifice on the bottom.

[johnbuckley]

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Originally Posted by JD 1931

.....an double venturi Holley carb. and need to know if the inverted cap jet was used? ........... JD

Yes it was, but a later-type with nozzle at the top works equally well on it. ( and don't rely on the actual jet nozzle size to be accurately stated by any number stamped on the jet- over the decades people have often enlarged them by "cleaning" them with bits of wire etc! ) See Steve Pargeter's excellent booklet "Zenith Model A Guidelines"