A question for all the buddying IDF40 owners out there???

Who is running theirs with an electric pump who is running theirs with a
mechanical, i currently have a mechanical pump and have long had problems
getting the best out of the weber, not saying its bad but not perfect.....
What has been solved with the electric pump, can i expect it to be a lot
better? tell me (everyone) your stories... im interested in changing over to
electric but am turned off by the noise? additional electrical things to
have cause problems? safety of lossing a line and covering engine in fuel?
etc etc etc.... should i run another line (return line) if i run an electric
pump so it doesnt 'jam?' and can keep pumping when the engine is not
consuming?

Dan

I have had to put up with the noise since I went to 44IDF's with a Holley electric. I'm sure that the pump would be much quieter if I ran a bypassed regulator (return to tank) as opposed to the standard setup, fuel pump with fuel regulator. What do people say?
I know of people running a 2ltr engine on the track with the standard fuel pump as well.

Crox - what problems have you had??

Are you running a single or dual idf's

You jetted right?
Dont think a electric pump would make all that different.
I run dual IDF36's on a meck pump no problem

depends what kinda of electric pump you use. When I was using my webers I had some cheap pump from autopro or somewhere. I just used it straight from the box, no regulator or anthing. The engine in my current kombi was fuel injected converted to carb so it had a mistsubishi electric pump, with one of those simple dial regualtors. No return line needed. If you use an EFI pump you will have to have a regulator and a return line. None of these pumps have been noisy. I cant hear them when the engine is running. They're mounted on little rubber mounts.

Don't worry about the noise the electic pump makes: you won't be able to hear it over the webers.

I currently use a holley pump. It works just as well as the cheap repco pump I used in my old car.

I've had 2 of those chrome adjustable regulators. Both leaked and are absolute crap. Carb Services on Parramatta Road supplied me with my new regularor. I can't remember the name of it but it looks a lot more serious. They are apparently used on weber fed Ferraris. They have to be set up with a fuel guage. I checked mine and it was giving just under 3 psi per carb and I didn't bother changing the adjustment.

Electric pumps should be run from the tank end of the fuel line so the push rather than pull the fuel.

Hope this is helpful. CYA, CT

Malpasi regulator?
I think I might have a spare or two.

Its not so much that it is running bad or anything... not really any hesitation (just an annoying exhaust tone at low revs? tuning out i think) its more that i wonder if it would run better... how about thoughts from people that have changed from mechanical to electric... what about circuits people are using for cutout of their electric pumps?

dan

circuits? no circuit for me. Russian roulette. Even if you use the stock carb you will still get fuel pumping away till your float bowls run dry. Admittedly not as much.

I think if you arent suffering from fuel starvation at higher revs and loads then changing fuel pump type wont answer your problems.

Is what you're hearing exhaust or intake? My dead stock 97 lancer has annoying farty intake noise at lowish revs but plenty of throttle.

Does that tacho relay work ok at startup??? sooooo what happens? as soon as you start cranking it starts pumping? isnt that one of the advantages of the elecy pump that it fills the bowls before you crank?


dan

Hmmm at the moment i am running the std pump with no reg and two idf 40s on a 1641. Maybe i should just add a pressure regulator?? wonder if this will do anything/??

and ideas?

Only if you are having trouble with the float bowl flooding from too high a pressure or running the bowls empty when the demand is there, then more fuel pump pressure is required and then kept constant by the Regulator but I doubt that you would have much trouble with the fuel unless you have got the heads breathing better etc because the demand on the fuel system is directly related to the amount of Air that can be consumed otherwise if the air is the same and the fuel is running out then perhaps you are tuned too rich and thus you will be loosing power anyway.
Remember that a chain is only as strong as its weakest link so the biggest most expensive Carbs in the world wont do diddly squat unless the carb is the weakest link.
Chances are that your Cylinder heads are the weakest link with the Valves are allowing only the standard amount of air past.
This may be old news to you, I dont know what sort of setup you are running.
Cheers Tony
P.S. If you Buy an electric pump you can buy something quiet like a carter pump and not a noisey Holley, I have been very dissapointed by the noise and reliability of the Holleys and very impressed by the Carters.

Crox it sounds to me like you may need a louder sound system in your car if you choose to go the electric fuel pump.(DOOF DOOF)

I've never used a holley pump, but I've never been able to hear a pump when the engine is running. The one in my kombi at the moment is a bosch pump out of a volvo. I can barely hear it even when engine is off.

I think if its not solid mounted to the dash it will be fine as far as noise goes. I dont think an electric pump will be of any benefit here though.