Relocate fuel pump, Where should it go Options

[Joe Ricard]

ANother since I'm in there and plan on replacing all the fuel lines anyway. Might as well move the fuel pump from the engine compartment to ?????? under the tank? In the car or under the car inside the splash shield? Does the return line still hook up the same? and will the plastic fuel line be OK under pressure rather than suction? Looking for best fix rather than cheapest. When messing with gasoline and 914's I have become a little gun shy.

[lmcchesney]

Having the pump in the engine compartment resulted in episodes of Vapor lock. Thus, Porsche relocated the pump to the front. The plastic fuel lines are 30 years old. Look on the sites and see discussions of in cab fires. I replaced my fuel lines throughout. Reccomendations, if you use say methanol suppliment, to replace the rubber lines every two years. Make sure you obtian FUEL INJECTION lines, tolerates higher pressure. I replaced the centeral tunnel lines with steel 3/8" brake lines. The engine and gas tank were out, so more room to work. The center tunnel replacement was not that difficult. I passed a guide wire through the old lines which made it easier, but removing the rear inspection plate, the shifter and the front inspection plate makes it reasonable. When installing the pump in the front, I passed the Power wire through another brake line for protection. Not sure if necessary. Since I wanted to add more in dash monitoring, I passed two additional 3/8" brake lines from the rear firewall to the front inspection plate of the centeral tunnel. Makes wiring from the engine compartment easier for now and in the future. Remember, S=suck D=druck(pressure) and R=return. IF you move to the front, you have to decide how you will make the connections at the firewall. PP has tech articles using very pretty brass/AN connectors. These connectors are expensive, but can reduce cost if you find their equalivents at Grainger(on line store available). They have hydrualic lines/connectors which are the same but less expensive. Or use Fuel Injection Hoses to make the bends. Always test for leaks and achiving final pressue at the end. Oh yeah, no smoking.
L. McChesney