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Re: [T3] fuel pump problem


OK... Im picturing it now. I musta been running slow last week.

Thanks Russ!

Keith

> >
> > Maybe Im not picturing this right but I wouldnt think a different pump
will
> > need an adjustment.
> >
> The "orfice size" is controlled by a spring and a diaphram. Pressure
> from the pump comes into the regulator, and presses on a diaphram that
> has a spring behind it. If the pressure is higher than the spring
> pressure, the diaphram moves away from the orfice making it bigger,
> allowing more fuel thru the orfice and back to tank. As the pressure
> drops, the diaphram moves closer to the orfice closing it off, therefore
> raising the pressure. It does this until it finds a balance.
> On our regulators, the adjusting screw just changes the spring tension
> on the diaphram.
> On modern regulators, mostly, the spring pressure is set by the
> manufacturer, and that is where it stays.
>
> -- 
> Russ Wolfe
> '71 FB AT
> '66 FB MT
> '65 T1 (not running)
> russw@classicvw.org
> http://www.classicvw.org
>
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