School Bus ...... Flathead fuel pump

[34fivewindow]

Anyone here, ever use a bus fuel pump ? At one time this was a pump sold by speed shops, for hot rodded flatheads. They are listed in the Ford green book, but not much info. on them.

[Barlea]

Seems like they were pretty common on trucks in Canada in the fifties, I have had one on my '35 2 Ton for a couple years, and it starts right up after sitting all winter. ..B.

[34fivewindow]

Originally Posted by Barlea

Seems like they were pretty common on trucks in Canada in the fifties, I have had one on my '35 2 Ton for a couple years, and it starts right up after sitting all winter. ..B.

Well the pump body itself, says made in USA, but on the box it came in, says Canada. thanks for the reply .......Ed

[Flathead]

I thought the bus pumps were bigger around than what is pictured. A larger diameter diaphragm.

[34fivewindow]

Originally Posted by Flathead

I thought the bus pumps were bigger around than what is pictured. A larger diameter diaphragm.

The box says 34 to 47 V8 bus, maybe the 8BA bus pumps are bigger, don't know.

[lonewolf]

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Originally Posted by Flathead

I thought the bus pumps were bigger around than what is pictured. A larger diameter diaphragm.

M
Agreed that does not look like the ones i have are bigger

I have one on a 4x2 setup and it works great

[jimTN]

The ones I have are the same size as a 55-7 stovebolt v8. The work well but I would caution anyone about using old stock without changing the diaphram cause alky will eat it apart.

[Barlea]

I guess the ones I spoke of weren't bus pumps then, because the "inverted" top bolts up to a regular 8BA diaphragm and base. ..B.

[Bruce Lancaster]

Yes, the one shown there is not a bus pump, which is noticeably larger.
I think what you have is an aftermarket assembly of Ford (normal size) base and a top from some other application. I have seen similar in the chrome gadget section of 1950's speed catalogs...glass dome chromed replacement pumps, just shiny, no higher volume.
On the stovebolt connection...I seem to remember that a further high volume enhancement of the bus pump for racing flatheads was the addition of later 1950's Corvette upper casting, which if I remember correctly had six valves rather than two!