Ed,
Any information that is correct is germane. As far as I am concerned,
you can't get too much information on a subject. Your citing the source
and application makes it germane and therefore part of the free-flow of
information that makes this list great.
No foul, no penalty (no penalty box).
Joe
Edward Hamilton wrote:
>
> Please excuse my post concerning the fuel pressure question by citing a source
> that was not germane to the question. I have an interest in the subject and
> don't wish to be sent to the penalty box (as have so many recently.) In my
> particular case, I have a boot mounted electric fuel pump of unknown
> manufacture, of unknown pressure, feeding the stock Stromberg carb. All works
> well today, but I plan to install twin HS4's this summer and have been
> contemplating the fuel delivery system. Hence, I've read just enough to make
>me
> dangerous.
> When I do the job, I plan to install a filter between the tank and pump along
> with an additional one in the engine bay -- not sure if it should be before or
> after the pressure regulator (which will be installed at the same time.)
> >From an electrical standpoint, the pump feed (currently) is from the green
>lead
> at the fuse block. This appears to be 18/20 gauge wire with an in-line fuse
>25
> amp. I've added a switch in the trunk, which is my modest version of an
> anti-theft device. However, I think the wire is too small and the fuse too
> large. Not wanting to "cook" my recently reworked wiring, what would the
> recommended fuse size be for an electric pump?
> When I find the time to perform the installation, I plan to start with 3.5
> P.S.I., and shall let those interested know of the outcome -- providing my
> thrust washers are not in the sump by then.
>
> Regards,
> Ed Hamilton
>
> Andrew Mace wrote:
>
> > On Fri, 1 May 1998, Joe Curry wrote:
> >
> > > Does it say what carb. setup that is for? I recall reading (but I can't
> > > for the life of me remember where) that the 2-4 psi setting is correct....
> >
> > > Edward Hamilton wrote:
> > > >
> > > > According to the Spitfire 1500 Competition Preparation Manual, "A fuel
> > > > pressure regulator should be mounted on the firewall to enable fuel
> > > > pressure to be maintained at 3.5 - 5 lbs. sq./in."
> >
> > FWIW, the specification for the original AC mechanical pump, as given in the
> > Herald, Vitesse 6, Spitfire (through Mk.3) manual is 1.5-2.5 lb./sq. in.
> > A "prepared" engine might require a bit more, but I suspect anywhere in
> > the 2-4 lb./sq. in area is probably sufficient.
> >
> > --Andy
> >
> > * * * * * * * * * * * * * * * * * * * * * * *
> > * Andrew Mace, President and *
> > * 10/Herald/Vitesse (Sports 6) Consultant *
> > * Vintage Triumph Register *
> > * amace@unix2.nysed.gov *
> > * * * * * * * * * * * * * * * * * * * * * * *
--
"If you can't excel with talent, triumph with effort."
-- Dave Weinbaum in National Enquirer
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