Replacing Fuel Pump

[Toller]

The mechanical fuel pump on my 1972 1600 cc is leaking.  Have tried to tighten hose clamps but leaks seem to be coming from seams of the pump itself.  Looked at offering from CIP1 for rebuild kit does not look like pump on my engine.  Spoke to tech at CIP1 and they recommended going with electric fuel pump and regulator set up, removing mechanical pump and installing block off at mechanical pump location.  Wanted to know if anyone has had any experience with installing electric pump and where was preferred location. 

After reading posts on relocation of fuel filter to front of car due to reduce potential fire hazard was thinking that install of electric pump, regulator and filter to firewall area adjacent to fuel tank would be best location.  Also if there are any cautions re proposed installation besides not spilling gas around open flames would be appreciated.

David B Dixon
Port Perry ON CA
Sabine

[Al Greig]

I installed fuel pump in frond trunk next to gas tank

[edward ericson]

That’ll work.

Mine’s down lower, on the floor, in the “dead space” ahead of the passenger compartment but under the fuel tank.

That said, as a former VW guy, I’m baffled by this tendency to go with electric fuel pumps. The mechanical one on my stock-ish 1500 with the single Solex carb worked fine. Seems like a solid setup.

Now, the Speedster guys with their big dual Webers and what-not have explained their need for special, usually expensive, highly tunable fuel-pumpage. But short of that (or, as in my case, a stock EFI setup that needs a high-pressure fuel system), I wonder what one gains?

[John Simion]

Sorry for asking, but what is the blue bag in the right hand side of the picture (driver’s side of car)?  My car is nearly identical under the “hood” but I have no blue bag.  Windshield washer?

[Al Greig]

The blue bag is windshield washer fluid.  I wound up with an electric fuel pump because the mechanical one died about 100 miles from home and all the local auto store had in stock was an electric one.

[crash55]

2 things where an electric pump does better. more consistent fuel pressure, also there is less loss of power from the motor because it takes less energy to run the pump. the closer to the tank the better elec. pumps push the fuel better than suck the fuel.

[Toller]

I now have all the parts from CIP1 to replace the mechanical fuel pump with an electrical one.  In reading the installation documentation they recommend wiring the fuel pump to the oil pressure switch to shut the pump off in the event of a mishap where the ignition switch is not turned off.  Worst case scenario based on scan of net is that pump could continue to feed fuel to engine and possible fire unless a fail safe is added to wiring.  As the oil pressure switch is a NC (normally closed) contact when the oil pressure low it powers up the oil pressure light.  When the engine is operating normally the pressure switch opens the contact and the light goes out.  I have prepared the following electrical schema and I would welcome comment on design.  Also if there is a simpler design would appreciate input:

David B Dixon
Port Perry ON CA
Sabine

[Toller]

Here is the schema

David B Dixon
Port Perry ON CA
Sabine

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