WHAT’S IN MY STROMBERG CARBURETOR?
Stromberg 97: 0.045in main jets and a Number 65 power valve. All new Genuine Stromberg 97s are supplied with this as standard.
Stromberg 40 and 48: 0.048in main jets and a Number 63 power valve (a 63 PV is a bigger jet than the Number 65).
Stromberg 81: 0.035in main jets and a Number 71 power valve.
Stromberg BIG97: 0.056in main jets, a Number 65 power valve #65 and a Number 60 accelerator pump valve 60.
Remember though, that this was the standard jetting on 1930’s gasoline at sea level. Ford supplied smaller jets for cars supplied at high altitude. And modern gasoline is nothing like it was back then. Nowadays, you need to consider the best jetting for your own application, and the local gas and local elevation, engine tune, the season (altitude, ambient temperature and humidity), your performance and economy expectations, and more, can all have an effect on the jetting you should use.
NOTE:
Main Jet Numbers, the bigger the Number, the bigger the main jet orifice making your Stromberg carb richer.
Power Valve Numbers, the bigger the Number, the smaller the orifice making off idle enrichment leaner in your Stromberg carb leaner.
Oh, and don’t forget you’ll need a Stromberg Premium Jet Wrench to preserve the quality of the main jet and Stromberg carburetor.
STROMBERG MAIN JETS:
We stock ready to ship, Genuine Stromberg Main Jets in sizes 0.033″ thru 0.063′. Remember, the bigger the number, the richer it is. Size is a direct correlation of actual orifice size.
STROMBERG POWER VALVES:
We stock ready to ship, Genuine Stromberg Power Valves in sizes 60 thru 71. Remember, the bigger the number, the leaner it gets. Number is not a direct correlation to 0.00″ orifice size.
