Yes you are right. I was just adding the info about
the in-tank pre-pump as people here make this mistake
when they pick parts for their projects and then scratching
their heads, trying to figure out what's wrong with the pump.
There were Volvo's here with carbs up to 1987-88 and some
of them used electric fuel pumps. Different markets - different
equipment.
Thomas
Patrick J. Horne wrote:
> Thomas,
>
> While it is true that RWD Volvos (240's and 260's) have two fuel pumps, I
> was refering to the mechanism of protecting a vehicle from a run away
> electric fuel pump in the case of an accident. Besides, as far as I can
> remember all the 240's and 260's were FI engines, which used much higer
> fuel pressure than we can possibly use on our roadsters, so these fuel
> pumps would be of no use to us.
>
> Peace,
> Pat
>
> - Support Habitat for Humanity, A "hand up", not a "hand out" -
>
> Pat Horne, Network Manager, Shop Supervisor, Future planner
> CS Dept, University of Texas, Austin, Tx. 78712 USA
> voice (512)471-9730, fax (512)471-8885, horne@cs.utexas.edu
>
> On Wed, 29 May 2002, Thomas - Sweden wrote:
>
> > RWD Volvo models had a pre-pump in the tank and a
> > main pump under the car just before the fuel filter. They
> > went to a single pump system on the front wheel drive
> > models. If anyone will use these you need both pumps
> > or the main pump will not get the pressure high enough.
> >
> > Thomas
> >
> > Patrick J. Horne skrev:
> >
> > > Volvo 240 and 260 series used electric fuel pumps and controlled them a
> > > bit differently. They have a relay that is connected to the ignition
> > > switch so it will turn on for a few seconds when the key is turned on,
> > > then it turns off. It also is connected to the ignition system and
> > > monitors pulses from the distributor (points or electronic). When it sees
> > > pulses, it turn on the pump. No pulses, no pump.
> > >
> > > Peace,
> > > Pat
> > >
> > > - Support Habitat for Humanity, A "hand up", not a "hand out" -
> > >
> > > Pat Horne, Network Manager, Shop Supervisor, Future planner
> > > CS Dept, University of Texas, Austin, Tx. 78712 USA
> > > voice (512)471-9730, fax (512)471-8885, horne@cs.utexas.edu
> > >
> > > On Tue, 28 May 2002, John F Sandhoff wrote:
> > >
> > > > A couple of comments:
> > > > > (Who makes a good electric fuel pump, and where should it be
> > > > > installed on a Roadster.
> > > >
> > > > Electric pumps should be mounted as close to the tank as is practical.
> > > > Electrics are meant to push the fuel, not pull it. Also, the point of
>going
> > > > electric is to keep the fuel system at a positive pressure.
> > > >
> > > > This also means that you should be certain all your hoses and lines
> > > > are in good shape!
> > > >
> > > > > Also, what is the importance of an oil pressure safety switch if
> > > > > installing an electric fuel pump.)
> > > >
> > > > Your life. Your passenger's life. The life of others involved in a
>collision
> > > > with your car.
> > > >
> > > > If you hit something, or roll over, and your fuel line ruptures, the
>electric
> > > > pump will happily spray gasoline all over the place. A cutoff switch
>will
> > > > shut down the pump before it creates a 5 gallon puddle in the street.
> > > > Anybody running an electric should put in some form of collision switch!
> > > > Holley makes a three-wire one that will activate the pump during
> > > > cranking and when there's oil pressure (you need to activate the pump
> > > > before the engine will start if the carbs are dry).
> > > >
> > > > -- John
> > > > John F Sandhoff sandhoff@csus.edu Sacramento, CA
> > > >
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