Facet Fuel Pumps, 34 year old pump finally died Options

[DonTraver]

The original fuel pump on my 914-6 finally died, started to die on the way to GAF, didn't make it, but made it home. I priced new fuel pumps, $370-$450, ouch.

I replaced the pump with a FACET pump, plugged return line. New pump runs 4-7 psi, 32 gallons per hour. Fuel pressure runs at around 5 1/4 psi at idle. Old pump put out 5 psi at idle.

I seem to be getting vapor lock after turning engine off and fuel lines absorb radiant heat from engine. The new pump fit on the orginal fuel pump rubber mounts in engine bay corner, and it was a nice, neat installation.

I picked up some 2000 degree tubing heat sheild yesterday and will install over fuel lines for radiant heat.

The question is, "should I reconnect the return fuel line with a orfice fitting and what size orfice should the fitting have, or is it just a hit or miss deal?".

Any suggestions will be appreciated, Thanks

[DonTraver]

I matched the new pump as close as I could get to the original pump, and it's recommeded for carbs. Also checked with Don Clark at Extreme Motorsports (Porsche Master Mechanic). He uses FACET pumps on race cars.

Now if I was using a pump from a 914-4 with fuel injection, fuel pressure runs 45+ psi, if I remember right, then a fuel pressure regulator would be needed to reduce the pressure to the carbs or you'd blow out the carb float bowl needle valves with the high pressure.

So I think I've got a good sized pump, just trying to cure the vapor lock problem.

One other thing, when it's sat with a hot engine and then restarted, it sounds like the pump is running dry, clears up at idle in 1-2 minutes, that's why I suspect vapor lock.