What's best fuel pump for Webers (1969 911)

[H.G.P.]

I have 1969 911, with Webers. Fuel pump "clakity clackity", probably time to replace (although the car accelerates well, starts slow at ignition) I know the "clackity" sound is from the pump, as I pulled the pump fuse, and no noise. Is there an ideal quiet replacement pump? Rotory that's quiet and dependable perhaps? I see one advertised here at Pelican for around 89.00. Also, how is the Facet pump? ( I've done a search at this site and note it being used.) Do all these have internal pressure regulation? Thanks

[rboylan]

I've got a perfect unit removed from my 70 E. I put a 3.3 motor in the car and sold the original 2.2. The pump runs about 3.5 lbs. $35 delivered. Let me know.

[porsche74]

HGP:

The "E" MFI pumps have too much operating pressures for a carbureted installtion.

The very best pump you can use is the Bosch rotary one used in the '70 "T" and 914/6. Not cheap but FAR FAR more reliable than the Facet POS,...

You get what you pay for and if these items fail anywhere, you'll be walking. I'd recommend a Holley 0-5 FPR set at 3.5 psi and set the float levels at that pressure.

[H.G.P.]

Is the Bosch fuel pump available Porsche dealers OEM only?, and the FPR where available?

[porsche74]

Originally posted by H.G.P.
Is the Bosch fuel pump available Porsche dealers OEM only?, and the FPR where available?

Anyone selling Bosch stuff can get you that fuel pump. Just don't be surprised to spend $ 300+ for that thing. The dealer might not have them,...
Check Zim's, GPR or Rennsport.

You can find the Holley 0-5 FPR priced right at www.Jegs.com or Summit Racing. Both are priced fairly.

[Phoenix]

I'm, currently in a similar situation and looking for a pump to feed my PMO's.

P-74: which Holley pump are you refering to? The "Red" seems to push out at 5-7 psi. The PMO's require 3-3.5 psi. Does this mean a pressure regulator is needed? If so, which would you recommend?

[cstreit]

I use a Holley pump in the racecar... Its noisy, but works well and no problems. You can get them with an in-line pressure regulator, I actually have one on the pump, and one in back in the engine compartment before the pressure guage, fail safe...

[porsche74]

Originally posted by Phoenix
I'm, currently in a similar situation and looking for a pump to feed my PMO's.

P-74: which Holley pump are you refering to? The "Red" seems to push out at 5-7 psi. The PMO's require 3-3.5 psi. Does this mean a pressure regulator is needed? If so, which would you recommend?

Hi Oliver:

I'd use the Bosch 914/6 pump together with the red Holley Fuel Pressure Regulator. Set the FPR at 3.5 psi then set the float levels.

Those PMO's will run flawlessly.

IMHO, buying/using a rebuilt fuel pump is simply asking to be smitten by "Murphy's Law". That "rebuilt" fuel pump will fail at the most inopportune moment or place and you'll not be happy. BTDT,...... There are places to save $$ and there are places that you want maximum reliability.

This is one of them.

[Phoenix]

QUOTE]I'd use the Bosch 914/6 pump together with the red Holley Fuel Pressure Regulator. Set the FPR at 3.5 psi then set the float levels.[/QUOTE]

P74: I'm having a difficult time locating the 914/6 pump you mention. Do you have a part number? I'm assuming it's Bosch?

Also, I'm currently getting 8-10 mpg on the PMOs. Is this normal. I'd hate to think that I have to live with that

[john walker's workshop]

there's a lot of little inline rotary pumps out there in the 3# range. try pelican. worldpac has a #912fpmp that works well, but you have to get it thru a shop that deals with them, as they're wholesale only. about $65.

[H.G.P.]

Thanks J. Walker. I finished installing new fuel lines in the engine compartment today, along with a regulator, fuel pressure guage from Summit Racing, and the fuel filter Warren Early S Man recommended. Car started well and settled down nicely, however the guage shows only approximately 2.8 lbs psi. So next I'm going to replace the fuel pump.

[H.G.P.]

...and a further note, I'm currently using Zeniths in my 69.

[Phoenix]

H.G.P.

It sounds as if you have your set-up nearly complete.

Which regulator and pressure guage are you using? Which fuel pump are you considering?

I'm currently thinking about the following set up:
Pump - Holley "Red" (12-801-1)
Regulator - Holley 12-804
Safety switch - Holley 12-810
Gauge - Holley 26-500
Filter (after pump) - Raco 120 AT (10 micron)
Filet after regulator and before each carb = a 1-2 micron (any suggestions?)

My biggest concern is getting the right pump? I've heard good things about the pump but am wondering, if it's so good, why the $80.- pricetag considering the $300+ I hear toughted for a Bosch?

Would this be a case of "you get what you pay for"? If so, I'll switch to the Bosch. (any idea as to the part #)

[porsche74]

There's more to selecting a fuel pump besides operating pressure.

Weber or PMO's have 4 float bowls that need a certain fuel volume to keep up at WOT. I would not consider using a 912 or any other pump without ensuring that any pump puts out 35-45 gal/hr.

That Bosch 914/6 pump will handle any carbureted 911. Full-race engines should use two in parallel.

IMHO, you get what you pay for,....

[Phoenix]

Anyone have the model number for the 914/6 Bosch fuel pump?

[T Bird]

Actually, it's a 911 part. The # is 911.608.107.00. It was standard equipment for the 69-71 911T as well as the 914/6. It also bears a Bosch PN which I don't have access to here at work. I bought mine a lot of years ago from Europroducts for about $140. The advantages of this pump are quality, a return line fitting, and the same external dimensions as the MFI fuel pump. Also, the electrical connector on the pump is the same as for the MFI pump, so the existing wire harness on MFI cars can be used if mounting the pump in the OEM location. The pump has a pressure valve that opens at 2-3 bar and dumps excess fuel back to the tank through the return line. This is how it maintains constant fuel pressure. There have been other posts about this pump. Check the archives.

[Phoenix]

Thanks T Bird. Part numbers allways make for clarification.

I just got off the phone with Richard Parr of PMO and he recommends the Holley "red" pump and to ensure a full loop system with a return line. This keeps the fuel cooler and cleaner.

I'm sorting this out with my mechanic over the next few days.