I ran an electric pump for a while for my 32\36. The main reason I was using it was to eliminate vapour lock that Datto's get in hot climates, the other intention was to run a new fuel line and use the original as a return line so the motor would have cool fuel running up to the carb.

I don't know whether it was the way I wired or where I mounted it but the pump kept tripping it's relay fuse then stuffed a relay, not even sure if the pump is actually stuffed.

The standard one seemed to work fine around the track and that's what I went back to.

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Yeah not sure about that. The power loss would be so minimal it would hardly affect the performance.

If you are considering eradicating the parasitic load of the facet pump in the hope of finding more power then you're better off putting the money for an electric fuel pump toward some bigger valves, better cam or double springs. Removing the mechanical facet pump (which operates on an eccentric lobe) in the hope of finding more power will be an absolute waste of time.

The money for a pump, fittings, lines, wiring, and regulator will be far better off spent elsewhere. These engines are old and they respond particularly well to some smart, straight forward modifications. If you want to get rid of it in favor of finding more power, go find another engine that doesn't have a cam-driven pump.

Weber, Dello and Mikuni all have their PSI rating at around 3, max 6 psi.

If you are running those carbs and you install the electric pump & regulator with the hope to find more power all you are doing is pissing in the wind and wasting your money on an unnecessary upgrade.

If the upgrade is done then and there with the objective to upgrade to an EFI system (but running a regulated sidedraft carb setup) then I say you are one smart cookie.

I think what Kiri is explaining (sorry I might be wrong?) is a reservoir system that serves as a back-up for when the carbs or induction system are suddenly throttled and require more fuel supply than the normal standard feed, a small tank chockers full of fuel will supply a nice dose of fuel at the required/same pressure as the rest of the system. There are two significant aspects of your fuel system that shouldn't be confused:

1. Pressure.
2. Volume.

You want more pressure for a carb setup, bump up the diaphragm spring.

You want more fuel at the same pressure, look for a bigger pump (be that electric or facet).

well, the pump works on 4-5.5 psi, the engine seems to be running smooth, and one way or another, i was going to pull out the mecanichal one cause im going to use efi setup when i finish the intake manifold, the engine is fully rebuilt and its redline is almost 6500 rpm´s

Hi, A lot of okes i know have a fasset pump, when running sidies. it has happened that they run ot of fuel, so they add a serge tank that solves their prob.

I know some turbo boys that run twin electric EFI pumps that also run out of fuel, the salution? a serge tank.

Mpower,I don't know the problem on your A15 but i recon a serge tank would prob sort it out, anyhow it's cheaper then a EFI pump, Less hassel then one from the reckers.

Try it you have nothing to loos, you can only win

Good luck

Efi pumps are high pressure, Most motoring stores sell pumps for holdens etc (carby model) But you will need a fuel regulator to keep the pressure down.
I don't really see it as an upgrade just more expensive, I'm running an electric pump only because my motor came with no mechanical pump and the hole was blanked off.

Mine makes a great tugboat impersonation!
Im hoping there's some quieter ones available to replace it, so id be looking for a 3-4 psi jobby for my 32/36 a15 then?
Does this also mean if I were to grab one from the wreckers from even a small efi car then it would not be suitable?

As mentioned, there are two benefits.

1: reducing mechanical power loss from the engine from a mechanical fuel pump
2: increased fuel flow if required to support other power-making modifications

Quote: Not really, if anything it'll ruin things without a regulator.


Quote: No.


Quote: It's only necessary when running setups that require more pressure, like electronic fuel injection or rising rate fuel systems (turbo).

Some people have convinced themselves that running Twin Weber, dellorto, Mikuni carbs requires an electric fuel pump. This simply isn't the case and the specified pressure range (of those carbs) is easily served by the stock facet pumps supply pressures and volumes.

If you want to increase fuel pressure slightly, install a larger fuel pump spring in place of the stock fuel pump spring. I can;t remember correctly but I think an L-series spring will increase pressure.

One less thing clicking on your camshaft. That's about all unless you are looking for more flow and/or pressure. For an A15, 3-4 PSI is all you need unless you have something more going on with it.

okay, im testing the electric fuel pump on my a15, i took off the mechanical one, the questions....... does this give more power to the engine? more revs? how is this a better upgrade??

cheers.