Fuel pump options for 73 injected model Options

[maddhatter]

I recently picked up a 73 1.7 that had been stored inside for 20 years. The body is great as expected sitting inside, but the fuel pump does not work among other things and looking for a replacement I see that they are no longer made. Great! Can I retrofit a later model pump to fit my car? I thought the injection systems were pretty much the same all the way through the years, but the newer pumps look vastly different from my hunk of metal pump, mine having 3 hose connections and the newer ones only the typical two. Thanks in advance.

[76-914]

I cannot speak to the 914 vapor locking myself and I'm not going to argue with someone that does this for a living. I have experienced it in aircraft and other gasoline engines. Most notably the Chevy 327 w/ air. When you raised the hood on a Texas version it would have a bunch of wooden clothes pins on the steel fuel line to insulate it against the heat. Your kind of on track re: the cool fuel coming from the tank. Vapor lock is usually going to happen after the engine is shut down and the temps in and around the fuel pump are hot. Gas begins to boil and bubbles. When I ran auto gas in my plane I would close the fuel and run the engine till it died. When I restarted the cold gas would cool the pump and carb so vapor lock was denied. It is more prominent in April or May (I don't know when they do it here?) when the gasoline blends are altered.
So did it matter. I don't F'n know but I was changing out the plastic lines so it was a no brainer for me.

[Prospectfarms]

I cannot speak to the 914 vapor locking myself and I'm not going to argue with someone that does this for a living. I have experienced it in aircraft and other gasoline engines. Most notably the Chevy 327 w/ air. When you raised the hood on a Texas version it would have a bunch of wooden clothes pins on the steel fuel line to insulate it against the heat. Your kind of on track re: the cool fuel coming from the tank. Vapor lock is usually going to happen after the engine is shut down and the temps in and around the fuel pump are hot. Gas begins to boil and bubbles. When I ran auto gas in my plane I would close the fuel and run the engine till it died. When I restarted the cold gas would cool the pump and carb so vapor lock was denied. It is more prominent in April or May (I don't know when they do it here?) when the gasoline blends are altered.
So did it matter. I don't F'n know but I was changing out the plastic lines so it was a no brainer for me.

That's good writing BTW, and interesting. I agree heat soak VL exists, experienced it with VW's. What I saw was gas boiling out of a carburetor, or probably more correct to say the fuel line to the carburetor. Would a pressurized FI system do that? I don't know. Just in case, when I installed the "non-stock" FP, I made a new bracket that dropped the pump a little bit. Not too much, maybe and inch, so it is separated from the (sometimes very hot) engine tin by that much.

"When I ran auto gas in my plane"

That sounds a little scary.

One thing I forgot to say to Madhatter that I'm surprised no one else mentioned is that a 914's have one of the easiest to remove gas tanks in history. It's one screw and two hose clamps.