'75-'76 FI Fuel Pump in '74 Location, Any Problems Putting it There?? Options

[AvalonFal]

I'm going to replace the original '74 3 port fuel pump with a '75-76 2 port model in the original stock location on the body under the R/S engine tin. As long as the flow rate and the operating pressure are sufficient, are there any operational problems putting it there?? How about mounting??

I know these pumps "push" fuel better than suction, but I don't want to relocate it to the front trunk. (I'm also trying to avoid buying a China rebuilt 3 port.)

All help appreciated.

Paul

[Cap'n Krusty]

I disagree with the contention that there was/is a persistent problem with vapor lock. I have lived in So Cal almost all my life, and have worked professionally on 914s there for 36 years. I have yet to see a case of "vapor lock". If I were to take an educated guess, I'd say they moved the pump in favor of a MUCH cheaper model, and the location because there is room, the pump is a "pusher", and they could eliminate come parts. They changed size and material of the pressure line, too.

Now, on to the question. Yes, you can put the pump there. Yes, there is a difference in the plumbing, which is pretty easily overcome. You remove the "Y" fitting and the 2 pieces of return hose. You then replace all 3 with a single piece of 7 or 7.5mm HP fuel hose. You're done ................ While you're in there, check the condition of the reducer hose from the plastic supply tube to the filter (which you have to change, too). If it's at all shaky, replace it. Part number 914 356 525 00, available from Porsche. DO NOT attempt to use a 3/8 hose and squeeze it down with a hose clamp!!!!!!!!!!! We like you, and we don't want to see your car become a training mission for your local fire department ................

The Cap'n