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Old 07-11-2019, 08:14 PM   #3
Bored&Stroked
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Join Date: Jan 2011
Location: Central Ohio
Posts: 5,009
Default Re: Fuel pump rod - what is the purpose of umbrella?

Hmmmm . . . as it moves about .200 of an inch, I doubt that it pumps much air! Given the cubic inches of the engine and the amount of air that the road-draft system most likely moves . . . can't imagine it doing anything. Probably just another "flathead urban myth"! LOL
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