Hi all,
thanks to everyone who volunteered (sp?) hints and so forth. When I can get
out of the office and up to my armpits in hi-test I will find some real
answers - who knows what is even in the car . . . . (better to have some
knowledge before the real fun begins, eh?)
Somehow the mental images of a burning garage with the Tiger in it . . . . .
stay tuned, and thanks a bunch!
David
> "Adin, David" wrote:
> >
> > Ok guys . . .
> >
> > My neighbor (AC's and a TC - the Ferrari sits outside!)
> can't understand the
> > talk of leaking SU pumps - were the older pumps brass where
> a tiger pump is
> > "plastic" ???
> >
> >
> > thanks for any forthcoming tutorials.
> >
> > D. E. Adin, Photographer
>
> (Slightly snipped)
>
> David,
>
> Please do NOT be confused by misinformation on the list. The SU fuel
> pump is NOT gasoline sealed by a plastic cap with a single nut. This
> plastic cap is the cover to the electrical switching system
> points, and
> allows energization of the solenoid coil. The coil (encased
> in the long
> body) surrounds a central operating push rod (armature) that is
> connected to a multi-layered, and pump diaphragm at the bottom (other
> end) of the pump, near the aluminum bottom housing. The electrical
> points activate the armature when low pressure is detected on the
> output, and operates the diaphragm to pump fuel through inlet
> and outlet
> gasoline valves in pressed steel cages.
>
> The incident of cracking the electrical points cover, with the wire
> input screw retaining nut, is completely separate from causing a leak.
> This cannot be the cause. This is NOT to say that the unit wasn't
> originally defective, or that it did not leak gasoline from
> some OTHER cause.
>
> The SU pump is a sturdy and reliable design, when properly mounted and
> the correct, original design, gasoline line connections are used. This
> diaphragm pump is no different than the mechanical ones operated by a
> camshaft on many of our carburetted American cars, before fuel
> injection. The only instance of unreliability I have run into is the
> tendency of the electrical points to get dirty, and not operate
> properly. Maintenance cleaning is suggested.
>
> The entire design of this pump, as well as description of operation,
> setting, and maintenance, is located in The Rootes Tiger Workshop
> Manual, Section C, (Fuel System), pages 4 through 7 in my version.
>
> I am sure there are other quality electric pumps on the
> market that may
> have some modern rotary pump designs, but be wary of the pressure
> output, which can override your carb inlet valve. These carbs are low
> pressure devices, but very heavy engine mods may require a higher flow
> rate pump than stock,
>
>
> Steve
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