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Electric Fuel Pumps


POP3Y3

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Any recommendations or input on elec. fuel pumps for a single down draft? I am looking into going that route but I do not want a noisy pump. Are any of you on here running electric? Do I need to run a Tii filter? Any pros/cons, experience (good or bad) or suggestions much appreciated.

thanks

(o=00=o)

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why would you change over? There are probably hundreds of low pressure pumps out there but I would only go that route if you are having a problem fueling with the stock setup.

'79 & '80 Vespas, R75/6 + R90/6 (and a Triumph), '76 IH Scout II

E36 

'71 VIN: 2574356 - Nevada, Sunroof, RUST and a really nice '76

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In my experience they are loud and a PITA unless you are running EFI. I would reccomend against it unless someone is telling you that you have fuel starvation issues up top.

'79 & '80 Vespas, R75/6 + R90/6 (and a Triumph), '76 IH Scout II

E36 

'71 VIN: 2574356 - Nevada, Sunroof, RUST and a really nice '76

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Assuming you don't have a compelling reason to change - I would'nt.

The electric pump (Carter) I have in 73CS is like the mother of all mosquitos that never stops buzzing. I have tried various measures to dampen the noise with no success.

If you find one that is quiet please let us know.

If we learn from our mistakes does that mean I have to make them all?

 

73 CS Polaris
76 2002a Sahara

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downdraft carbureted applications. The OEM (Pierburg) pumps last forever, are quiet, trouble-free, easy to get to, don't require wiring and get the job done. That can't be necessarily said for most electric pumps.

I'm a great believer in "if it ain't broke, don't fix it."

mike

'69 Nevada sunroof-Wolfgang-bought new
'73 Sahara sunroof-Ludwig-since '78
'91 Brillantrot 318is sunroof-Georg Friederich 
Fiat Topolini (Benito & Luigi), Renault 4CVs (Anatole, Lucky Pierre, Brigette) & Kermit, the Bugeye Sprite

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I mostly went with an electric because I couldn't find any mechanical pumps reasonably priced, and I was broke.... right now, AutohausAZ is listing it as $125 (!!) for a tiny lil Pierburg mechanical pump...

anybody got a better source?

I've currently got the Carter rotary P40something or another and it works fine, but much more hassle for wiring, and lots of noise. Still though, less than 60 bucks thru summit racing, much stronger than the mechanical pump... and no need for any type of regulator, since its self-regulating.

Sorry to tell ya Brian, but this has been argued way too much in the past, so you're best to look at old threads for pros/cons. If someone could find me a high capacity mechanical pump for a reasonable price ($60 or less), then I'd switch right over.

Bring a Welder

1974 2002, 1965 Datsun L320 truck, 1981 Yamaha XS400, 1983 Yamaha RX50, 1992 Miata Miata drivetrain waiting on a Locost frame, 1999 Toyota Land Cruiser

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not made from it! Last time I priced one a year or so ago I thought they were kinda pricy at $60 or so...

mike

'69 Nevada sunroof-Wolfgang-bought new
'73 Sahara sunroof-Ludwig-since '78
'91 Brillantrot 318is sunroof-Georg Friederich 
Fiat Topolini (Benito & Luigi), Renault 4CVs (Anatole, Lucky Pierre, Brigette) & Kermit, the Bugeye Sprite

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RockAuto lists a Bosch one as $72. Not too bad I guess... but I don't know if I'm ready to spend that much and find out its not enough for my sloppy DCOE carb setup. I was thinkin someone mentioned you could use a higher capacity one from a big 6 or some other BMW model, which would be great if you could find one in a junkyard, but I can't recall the model..

Bring a Welder

1974 2002, 1965 Datsun L320 truck, 1981 Yamaha XS400, 1983 Yamaha RX50, 1992 Miata Miata drivetrain waiting on a Locost frame, 1999 Toyota Land Cruiser

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Here are two previous posts that I have answered similar questions...

IMHO, I like the E3 Bavaria/e9 Coupe mechanical pumps....

http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,288923/highlight,pierburg/

And for electric pumps for carburetors I have used the Pierburg ones...

http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,307681/highlight,pierburg/

If you do install an electric fuel pump PLEASE use a fuel pump relay that shuts the pump off when either the engine stops running or has got an inertia switch that shuts it off in an accident/impact!!

HTH

Tom Jones

BMW mechanic for over 25 years, BMWCCA since 1984
66 BMW16oo stored, 67 1600-2 lifelong project, 2 more 67-8 1600s, 86 528e 5sp 585k, 91 318i
Mom&Dad's, 65 1800TiSA, 70 2800, 72 2002Tii 2760007 orig owners, 15 Z4 N20

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