fuel pump for 40 idf's

guards73/2.0 · guards73/2.0's Garage

I've got the dual weber setup on my car and discovered that the
PO left the original 25 psi fuel pump hooked up ( behind one of those FLAPS round pressure reg's). What's a good pump for this setup? I've heard about some sort of a VW pump from bug suppliers, and while I'm at it, I thought maybe I'd looke for a better regulator if you think that'd be worth it. Been there? What do yo think?

jabez · 07-10-2002, 01:08 PM

From all I've heard, FACET.

BenI · 07-10-2002, 01:28 PM

If you go to your FLAPS they will probably have the FACET pump. It's a rectangular cube, and is sold under different names (mine is a NAPA) but has the FACET stamp on the underside. You want a pump that outputs 3 psi. I had a regulator around but didn't use it because the pump actually pumped at 3 psi while the regulator seemed less acurate. Another way to go is a rotary pump which I've heard produces a more steady flow and is quieter-and more expensive. I've seen one offered at www.cbperformance.com.

Rouser · Rouser's Garage

I'd swap out the OEM FI fuel pump (it's a keeper; very not cheap) and regulator and install a Walbro Rotory Fuel Pump.

I got tired of the clatta-clatta-clatta of the Purolator/Facet diaphram-type pump I had in there; when I flicked the ignition, most would remark, "Man, sounds like my air compressor ..."

The Walbro (when properly isolated with those rubber-baby-buggie-bumper standoffs) just whirs, making for reduced mechanical noise; the engine alone takes care of THAT department.

JWest · 07-10-2002, 01:45 PM

Facet pumps are noisy little buggers.

The one posted by Rouser is actually a bellows (not rotary) pump - it is good and quiet (I have one of those).

The one at CB Performance is the same price as the Walbro and is a rotary - I have not used that one but I think it might be the most durable of the bunch and should be as quiet as the stock fuel injection pump.

Kevin Powers · 07-11-2002, 05:35 AM

here's the cb unit.quiet with built in fuel pressure regulator designed for correct weber f.p. facet type sounds you need a valve adj.

kevin

guards73/2.0 · guards73/2.0's Garage

OK, I'll give you a more current disclosure here. My car's been sitting since august of last year ( botched topend rebuild) and before I out it away I bought and installed a VERY noisy but compact rotary pump that put out 5 psi and set my reg
at 3. The result I was expecting was a nice quiet occasinal zzzip
sound that stopped when the desired FP was reached and occasional zzzips to maintain that pressure range, sort of like on
my 1995 Volvo 850 driver car. Instead, I get constant "zzzzzzzzeeeeaaaaaaaaazzzzzzeeaaaaaa" type racket
that only shuts off with the key. I thought these electric FP's had
sort of a regulator in them that shut them down in a pressured-up system. Maybe the ideal is just constant on, low current draw
and low noise. BTW, is that photo reversed?

rkyrdrcr · 07-12-2002, 05:22 AM

If I'm understanding you right you're saying you hear the pump running all the time. I used a Borg Warner rotary pump from Pep Boys (generic kit), because I heard Facet's were noisy. But from what I understand the pump will run all the time, so you should always here it on.

Richard

Kevin Powers · 05:45 AM

the picture's not reversed (you don't need a mirror to read germany on the fuel line). what might be misleading is that the filter is mounted up stream of the pump assy(in between the tank and the pump). not like you would see in stock type 1 where the filter is after the fuel pump. mounting the filter in this orientation keeps the crap from the tank out of the new pump. the only thing i would have done dif (and will eventually) was install a petcock in bewteen the tank and the filter.as for noise it makes very quiet wwwrrr,just enough so that you know it's running, like in a f.i. type 3 when you turn the key.when i had a tappet type i could hear it over my webers and bursch.

DDS · 07-12-2002, 07:25 AM

I used an early 911 bosch rotary pump (meant for webers) mounted on the RBB bumpers and moved it to the front trunk. The nice thing is that the. dia is the same as the stock pump, so I used the stock bracket. You could simply mount one of those in the stock location with the stock hardware. Not cheap though. (I swapped for mine).

guards73/2.0 · guards73/2.0's Garage

I think I have that same "generic" rotary pump. It's real small,but sounds like a dremel. I'll try sonically isolating the thing ( my audio background suggests high-density foam weatherstripping tape from Homo Depot and put into some sort of shock/vibtration dampng mounting) and I think part of my problem with this is that I have my sound system hooked uo through the key ( to prevent idiot battery drain) and that damn pump still runs zzzzzzzzzzzip! while the car's parked @ the beach and the stereo is playing. That sucks. I even thought about a fuel pump switch, but perhaps an ignition-off stereo makes more sense. A bellows pump sounds like it would be quieter, but I've never heard one.

Kevin Powers · 07-13-2002, 05:36 AM

if you can see it the clamp that holds the pump body is coated with sort of a plastic material.no metal to metal contact,maybe that's why mine is so quiet. all of my fuel hoses have fasteners with the same material, no chaffing.i bought them at firm in tacoma that sells all sorts of industrial hoses, fiters, and items for hydraulic applications. the coating on these parts is supposed to be to be impervious to liquids that would desolve regular vinyl and rubber type compounds.

kevin

confused · 08-26-2002, 10:18 PM

Holley makes a couple fuel pumps but they are very noisy, Facet is a noisy pump, all pumps run the entire time and do not stop when pressure is reached, no flow is added though. I love my aluminum rotary Mallory 110. It is intended for American V8s. I Have one in my 914-6 and it is very very quiet. When an air coolled engine is running you won't hear the pump. These seem to be the most solid efficient pump for a reasonable price. It cost me $120 and was worth it, self regulating at 5psi or more you don't really need a pressure regulator on IDFs. This may be a bit expensive for you poor boys but hey its a Porsche deal with it and buy the best parts you can that are closest to German enginering.

JWest · 08-27-2002, 05:50 AM

Actually, there are SOME pumps that do shut off when pressure is reached ("all" is a dangerous word). These are the positive displacement bellows type pumps. I have one on my Jag (factory) and it slows and stops as it comes up to pressure. At idle it ticks slowly, and faster as engine draw increases. Unfortunately, they are not very reliable, and most of the modern pumps you can get for reasonably money are continuous running.

Rant/defensive comment coming:

Quote:

expensive for you poor boys but hey its a Porsche deal with it

Confused, as long as you are throwing mud and calling us all cheap, why did you cheap out and get the cheesy Amurican pump instead of buying the proper Bosch pump that was originally used on the 914/6 or 911s with Webers? What's the matter couldn't afford it?

Rant off.