Noisy fuel pump

["Walter" <Whalt@xxxx>]

Rob Grady was right....
Replacing my old noisy fuel pump with a new one doesn't make the new one any
less noisy. When hot, it sounds like a seat belt buzzer. It isn't peculiar
to my car either. Coming back from a long trip in a two car DeLorean
convoy, Randy's fuel pump was really noisy too.

The longer the car runs, the more noise it makes. The less fuel that is in
the tank, the sooner it gets hot, and the more noise it makes.

There seem to be 3 main sources that heat the fuel:
1) the radiator fans blowing hot air on the fuel tank.
2) fuel circulating through the fuel distributor.
3) fuel circulating through the control pressure regulator.

Can anyone say which is the most significant source of heat and what can be
done about it?

Rob mentioned making a heat shield to deflect hot air from the fuel tank.
Has anyone done this and can give advice on how to go about it? And is it
effective?

If radiant heat isn't enough to warm up the control pressure regulator, it
has two electric heaters of its own, and ofcourse, thermally isolating it
isn't an option.

The fuel distributor could be thermally isolated better. It looks like it
is insulated by an o-ring seal, yet it 'appears' to be held down by 3 screws
that are not properly shown in any of the OEM manuals. Is this right? It
looks like there could be room under the fuel distributor for a full size
insulating gasket, and the retaining screws could be made of a material that
has better insulating properties than steel. An insulating adapter
extension ring could be made with an extension for the control plunger, but
the clearance for the engine cover is already pretty tight.

If all else fails, I am considering installing a transmission fluid cooler
in the low pressure fuel return line. This might help cool things a bit.
Would this be nuts? I'm not talking about doing anything REAL stupid like
mounting it in front of the radiator. I'm thinking about mounting it next
to the accumulator where it would be protected inside the frame; although,
there isn't much air circulation in that area. An electric fan would be a
bit much, and ducted air would be even more of a safety hazard. Maybe
radiant dissipation would be sufficient.

Or maybe I'm just not playing the radio loud enough.

Other things I have considered is that the fuel suction line is conducting
vibration through to the bottom of the tank. I'm using an OEM hose, so I
don't see this as being a significant contributing factor.

And don't go teasing me that this is too much candy for a nickel. You guys
doing the 3.0 Eagle motor conversions are further out in left field than I
am! And look at where I'm coming from :-)

Walt Tampa, FL