exhaust pressure driven petrol pump

[gavinnz]

Does anyone on the list have a exhaust pressure driven petrol pump off an early 1915ish American LaFrance?

What other relatively common American car of that 1915ish era used an exhaust pressure driven pump I could get??

How do they work anyway??? Do they have a diaphram that pulses with the pressure of the exhaust pulses and a one way valve down the line to keep the pressure in the line???

I will in reality have a electric petrol pump and pressure regulator hidden under the seat but I want to have the exhaust pump on the car to look the part.

Regards

Gavin

1915 Type 12 American LaFrance Speedster