Fuel pump query
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Thread: Fuel pump query

  1. #1
    Official RnS Addict D COUPE's Avatar
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    Fuel pump query

    The first of many lads get ready.

    I have a rover 4.0 engine with a webber on top. I have a Carter fuel pump P4070.

    Do I need a fuel return pipe. The webber only as inlet.....

    Thanks
    ITS NOT WHAT YOU DRIVE ITS HOW GOOD YOU LOOK IN IT

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    Rods 'n' Sods Junkie
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    As a rule of thumb a carb only needs a fuel feed. An injected engine uses a return line because it needs to keep air and vapour bubbles out of the injector, and the pressure regulator needs to vent fuel back to the tank.

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    Official RnS Addict D COUPE's Avatar
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    Quote Originally Posted by NMNeil View Post
    As a rule of thumb a carb only needs a fuel feed. An injected engine uses a return line because it needs to keep air and vapour bubbles out of the injector, and the pressure regulator needs to vent fuel back to the tank.

    Thanks for that . Will the pump switch off when it gets up to pressure or will it run all the time .
    ITS NOT WHAT YOU DRIVE ITS HOW GOOD YOU LOOK IN IT

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    Not sure but the blurb says it has an internal pressure regulator. At a guess it will run all the time as the maximum current draw on an electric motor and the most wear occurs as it turns on.

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    As long as the pump does not produce to much pressure for the carb it should be ok , However in this case i would check the specification of the pump also to see what it requires as some pumps require a return flow to keep them cool .

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    Official RnS Addict D COUPE's Avatar
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    Thanks for that I will look it up ....see what I can find.

    Im just trying to route the pipes weather it be one or two.

    DC
    ITS NOT WHAT YOU DRIVE ITS HOW GOOD YOU LOOK IN IT

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