rnanzig(at)webtv.net writes:
>At this point I am not interested in an electric pump. I like the
>retro look of the glass bowl.
Christopher Albers wrote,
>An idea I have toyed with is to gut the fuel pump (take out everything
>except the brass filter screen) and blank off the engine, leaving it in
>place. Then install an electric fuel pump in the back above the diff,
>between the shocks. You can keep the retro look and have the benefit
>of an electric pump. I may do this if I ever have probems with my
>stock pump.
I tried pumping though the stock fuel pump as described, and
found an interesting problem. The glass bowl is the reservoir
for the fuel pump, and is on the suction side of the diaphragm.
When the cork gasket leaks, you see air bubbles pulled into the gas
through the glass bowl.
If you have a pusher pump up stream of the mech pump, the bowl
is now under pressure (2 to 7 psi worth).
I could never tighten the bowl screw tight enough to keep it from
pifling fuel, with or without goop. There's just too much area
under the bowl, and the force generatied will push against the
hold down, which seems to strech under the load.
I suspect that I would have killed the mech pumps diaphragm soon anyhow.
If you want to make a pretty/functional pump setup, put the elec pump
downstream of the mech pump, and remomove the lever arm from the mech
pump (unless you want to wear your cams pump eccentric lobe in no time).
Jarrid Gross
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