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/wwwthreads_images/icons/tongue.gif "Hot Rodders" of the model "A" era used a gas cap with a shraeder valve (like a tire has) in it and a hand air pump tp build pressure for steep hills and more power. Interestingly enough, the WWII airplanes had turbochargers in some cases. We had no high-temp space age materials so they ran the exhaust outside the engine nacelle for several feet to cool it and then back in to the turbo. Just think of a turbo as two water wheels on the same shaft....the water spins one turns the shaft...and the wheel on the other end can PUMP water by it's rotary action. They hand pumped racers for YEARS to keep them in fuel. Before we had really good material, the fabric-insert diaphrams in fuel pumps were the achilles heel of motordom. Heck, I STILL find myself thinking "fuel pump" when thinking about taking a long trip, but they rarely go out before 100K anymore./wwwthreads_images/icons/crazy.gif

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