From:
cozwurth_REMOVE_121935_THIS_@yahoo.com
-snip-
Duke,
My post was prompted by an
earlier post in which a member adapted an in-tank pump,
and bypassed the external high pressure fuel pump.
The Fiero V-6 pump he used specs at 75 - 85 PSI and
regulated flow of 26 - 30 GPH. I may be wrong, however, the
CV in-tank pump supplies fuel, as a "boost" pump at
low pressure to the high pressure pump. After the car
sits for a period of time, the fuel could drain from
the line between the high pressure pump and the
pickup in the tank. This would cause a period of time to
pass before fuel was sucked into the high pressure
pump at start up. The low pressure pump fills this
void.
-snip-
Mike,
When I was looking for an alternative to the high
pressure pump on my Cosworth, I looked first for another
external pump that would fit the bill. The few that I
found were out of my price range (at the time, I was a
full time college student working part time at an auto
parts store for just over minimum wage). Since I could
not afford the external pumps, I started looking for
an internal pump that would supply the right amount
of fuel and was designed for use in a high pressure
system. I used the same CV sources as you did to
determine the requirements of the CV fuel system. The fuel
pump for the V-6 Fiero seemed to be the closest thing
to what I needed to get the car back on the road. It
was almost identical dimensionally to the stock
in-tank pump (only about 3/8-1/2" longer, if I remember
correctly) and very close to the stock external pump in
operating pressures and flow rate. I know the actual
operating pressure is determined by the regulator, but the
pump must be capable of developing enough pressure to
make the system work. My price to fix the problem:
$60, and the pump has a lifetime warranty to boot. I
don't think anyone was re-building the stock external
pumps when mine went bad back in 1991. It took me only
a couple of hours to install the pump, and it
worked fine for the type of driving I was doing. Even
though I never raced it on a closed course like Duke
does, I did wind her up more than once late at night on
some back roads and never felt a drop in power from
fuel starvation, and my plugs always looked good. (It
didn't use a quart of oil every 300-400 miles, either.
Only about 1/2 quart between 2000 mile changes)
Now
that there is someone who rebuilds the stock pump,
I'll probably get both of mine rebuilt for use
sometime in the future. I still like the idea of only
having to worry about one fuel pump working, not two.
Only a Cosworth "Expert" would even notice that my car
did not have the external pump installed, especially
since I fitted a hard fuel line to take the place of
the external pump and left all of the brackets and
sheilding in place. That setup worked fine for me for over
two years. My wife totaled the car in Dec '93 during
an ice storm.
Dave "Cozwurth"
CV# 0646 &
the ghost of CV# 1009
[This is message #1310 by user cozwurth on Yahoo! Club Cosworth Vegas:
http://clubs.yahoo.com/clubs/cosworthvegas ]