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Old 08-15-2020, 08:10 PM   #4
1930-Pickup
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Join Date: Mar 2017
Location: southern California
Posts: 725
Default Re: Fuel pressure at the carburetor?

The specific gravity of car fuel at 60F is about 0.73 (Google).
The vertical distance from the carb inlet to the top of a late 1930 full tank is about 22 inches.

If the liquid was water, then the pressure would be 22 in/H2O.
But this is fuel, so
22 x .73 = 16.06 in/H2O

16.06 = 0.58 PSI.

What do you guys think? Sound about right?


Revised 8-16-2020. Was 60C, is 60F.

Last edited by 1930-Pickup; 08-16-2020 at 06:36 PM.
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