Brian-
After breaking my camshaft, I removed the mech. pump and threw it a
great distance. I measured the distance between the mounting studs on the
block, and made up a small blanking plate and gasket. After installing
this, I attached a neoprene gas line from the old pump inlet
( fitting removed) to the carbs ( including an inline filter). I then
jacked up the rear of the car, and mounted the electric pump- sort of under
the fuel tank, attached to the outside of the spare tire well, off to one
side to clear the diff. Ran some more gas lines from tank to pump and pump
to old gasline (ISTR there originally was a short section of rubber hose
between the tank stub and the car's gasline) I don't remember exactly where
I tapped into a 12V switched line, (current draw is fairly low) and I also
installed a small, discretely located switch as a theft deterrent to shut
off the pump.
I suppose you could leave the old pump in place for sentimental
reasons, although as you point out the diaphragm could rupture with
disastrous effects. You would probably loose a bit of gas pressure as you
pass through the check valves in the pump, but this shouldn't be too much of
a factor. Perhaps a 'pass through' connection could be made inside the
pump, leaving just a
'dummy pump' for cosmetic reasons. However, there is a good deal of
satisfaction in hurling the offending part into the bushes for future
archeologists to find....
Regards,
Bob Westerdale
59 3A TS36967E
Bob,
What do you do with the mechanical pump. Is it removed and the
hole covered over? Or does the electric pump "pump" through the
old mechanical pump. If so can't you end up filling the
crankcase with fuel if the rubber diaphragm get a hole or splits.
I wonder if the old pump can be "fixed" to just be a pass-through
fitting and not allow a leak.
Brian Sanborn
62 TR4 CT16260L - Groton, MA
My TR4 Restoration Web Site
http://www.net1plus.com/users/sanborn/Home.html
E-Mail: sanborn@net1plus.com
-----Original Message-----
From: owner-triumphs@autox.team.net
[mailto:owner-triumphs@autox.team.net]On Behalf Of Westerdale,
Bob
Sent: Monday, June 12, 2000 9:23 AM
To: 'Fred Thomas'; triumphs@autox.team.net
Cc: spitfires@autox.team.net
Subject: RE: t/r 3 fuel pump
Fred-
A while back my fuel pump pivot pin fell out, and the lever
worked its way
further in where it jammed the cam and snapped it! As I remember
it, only
the fuel pump lobe and the #4 exhaust valve were affected. The
car would
run ( although terribly) 'cause I had a backup electric pump.
You will like
the electric pump concept. It allows you to fill the fuel bowls
prior to
cranking, much faster than waiting for the mech pump to fill the
bowls...
Bob Westerdale
FT wrote->
Well, I've finally discovered why my car stopped running when I
got back
from Illinois, the camshaft is no longer turning the arm on the
fuel pump to
feed the gas to the carbs, this a.m. I took the F.P. apart,
removed the
diaphram and bolted the pump to the block, no movement of the
F.P. arm at
all, none. I called Ken Galanders on Friday to ask if he had ever
heard of
this happening, and he said no, not on these cars, the high point
on the cam
lobe is still there, I do feel a little indentation on the rear
of the cam
where the arm would normally ride. No more concours judging this
year, a
electric pump with regulator goes on today, this cam has less
than 40K miles
on it, they should be good on a fuel pump hook-up for life, never
wear out,
sure don't understand this. Anybody on the list ever had such a
happening ??
"FT"
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