i am thinking of running an electric fuel pump on my 48ida's on me 2332.

will the standard pump supply the pressure it will need for a run down the track if required and of course for every day driving, well i should say VW runs.

is not the standard fuel pump up to it? i hear that webers only need a few psi to run. someone please explain.
advantages v disadvantages.

cheers. Paul

Pressure (psi) and flow rate are two different things.

Webers only need low psi, about 4psi, and a high flow rate.

So stock pump may the required pressure, but not the flow rate.

An analogy could be used like the following. High psi is like water squirted from a water cutter. High flow rate is like a bucket of water tipped over. One is pressure, the other is quantity.

Plenty of people run stock pumps with IDAs

If you run electric there are a few things to get around.
A safety cut out is a big one that most people don't worry about

You want the pump to stop running if the engine stalls or you're in an accident.
Few ways around that, I've used the alternator signal before, pump only runs as long as the alternator is spinning but this also needs a starter prime wired in, either push button or a feed from the starter to the relay.

Another method I also used when I had electric pump was an EFI fuel pump relay, mine was out of a Commodore but plenty of cars use them.

It's a relay that looks for a tacho signal to activate the pump.

Also depending what pump you use many don't stop the flow when they're not running so if you park uphill with a full tank you may come back to a sump full of fuel.
But if the diaphragm goes in a stock pump, same deal.


The stock pump does the job and doesn't suffer from any of those issues but the quality of the pumps available these days is a bit on the ordinary side.

Hi

To feed that sort of motor you will need a bigger fuel line as well.

Steve

^^^ beat me to it Steve