Printable Version of Topic

Posted by: Todd Enlund Oct 24 2008, 01:07 PM

I'm going to need a fuel pump for carbs. Any suggestions? I've heard mixed opinions on the Facet pumps. I'm looking at Holley pumps on eBay... are they robust enough that I can think about buying a used one? And then there's the question... mount it by the gas tank, or in the engine bay?

Posted by: southernmost914 Oct 24 2008, 01:16 PM

I think they are robust enough but are presett to run 8 to 9 psi. So you will need a fuel regulator to drop it to 3.5 psi. Maybe better to find a pump self regulated at 3.5 psi. If your going to have the car all apart, might as well mount it up front.

Steve

Posted by: ClayPerrine Oct 24 2008, 01:40 PM

Peerburg pump. Already runs the correct pressure for a set of webers, and is quiet. Mount it up front by the tank. It will work better pushing than it will pulling.



At Zims, we put them on old 911s when the factory bosch pump goes out.

Posted by: Elliot Cannon Oct 24 2008, 01:54 PM

You can't PULL a liquid!

Posted by: Todd Enlund Oct 24 2008, 01:55 PM

This one?

http://www.allzim.com/cgi/sh000001.pl?REFPAGE=http%3a%2f%2fwww.allzim.com%2facatalog%2fsearch.html&WD=pierburg&PN=copy_of_Pierburg_Low_Pressure_Fuel_Pump.html%23a1_21901_2e108_2e407_2eXX#a1_21901_2e108_2e407_2eXX

Posted by: ClayPerrine Oct 24 2008, 01:57 PM

That's the one!!! I am going to use it on my 911 when I finally put the engine in it.

Posted by: Todd Enlund Oct 24 2008, 01:59 PM

Yeah, but if the pump is lower than the tank, it could still be located in the engine bay... fuel would run to the engine bay even without a pump

I was leaning towards front mount anyhow, if for no other reason than the pump would be better protected.

Posted by: southernmost914 Oct 24 2008, 02:00 PM

You are right that pump sucks! That is the same pump I am running and works fine.

Steve

Posted by: Root_Werks Oct 24 2008, 02:35 PM

That's a good price, my cost is $85 for them. I got one sitting in will call for my 914. Glad I checked this thread!

Posted by: Todd Enlund Oct 24 2008, 02:43 PM

They tack on a $4 handling charge

But then shipping is only $4.80.

I might have to go for this when the time comes.

Posted by: KaptKaos Oct 24 2008, 03:20 PM

I'm running a CB rotary pump. Quiet and internally regulated.

Posted by: Todd Enlund Oct 24 2008, 03:36 PM

Hmmm... that's another interesting option.

Posted by: biosurfer1 Oct 24 2008, 03:41 PM

I'll be using a CB perf. too... Justinp71 has one running his new 3.0 6 and its quiet and gives a constant 3.5 according to his gauge.

Posted by: Root_Werks Oct 24 2008, 04:20 PM

The CB pump would probably work great as well, but I already have the other sitting for me to pick up. Since my 914 is a 74' and the wiring is already back there, I'll just leave it in the back and mount it up. I plan on having a pressure regulator in place as well and hooking the return line up etc.etc.

Posted by: yeahmag Oct 24 2008, 04:30 PM

So far so good with my CB pump. Mine is mounted where the original fuel filter was...

Posted by: Root_Werks Oct 24 2008, 04:32 PM

How much $$$ was it? Did I just pay $85 for something I could have got for $40?

Posted by: yeahmag Oct 24 2008, 04:39 PM

I got mine a long time ago, but it looks like they are $55.00
http://cbperformance.com/catalog.asp?ProductID=577

Posted by: DBCooper Oct 24 2008, 04:43 PM

One more for the CB Performance. They've given me yeas of quiet service on a variety of different cars and never a problem. And it's nice not to need a separate pressure regulator. Used the Holley one time, never again.

Posted by: Elliot Cannon Oct 24 2008, 04:46 PM

[quote name='Todd Enlund' date='Oct 24 2008, 12:59 PM' post='1094538']
[quote name='Elliot Cannon' post='1094533' date='Oct 24 2008, 11:54 AM']
You can't PULL a liquid!
[/quote]
Yeah, but if the pump is lower than the tank, it could still be located in the engine bay... fuel would run to the engine bay even without a pump

That's exactly my point. If the pump is lower than the tank, the static pressure to the pump is the same, weather the pump is in the front or the back.

Posted by: Root_Werks Oct 24 2008, 05:02 PM

[quote name='Elliot Cannon' date='Oct 24 2008, 03:46 PM' post='1094600']
[quote name='Todd Enlund' date='Oct 24 2008, 12:59 PM' post='1094538']
[quote name='Elliot Cannon' post='1094533' date='Oct 24 2008, 11:54 AM']
You can't PULL a liquid!
[/quote]
Yeah, but if the pump is lower than the tank, it could still be located in the engine bay... fuel would run to the engine bay even without a pump

That's exactly my point. If the pump is lower than the tank, the static pressure to the pump is the same, weather the pump is in the front or the back.
[/quote]

Yup, being a Boiler Sup and dealing with Hydronic loops/pumps all day, liquid doesn't lend to being sucked or pulled very well. Loves to be pushed as we all know it's a non-compressable. I'll move my pump to the front at some point. But not right now.

Posted by: southernmost914 Oct 24 2008, 05:25 PM

[quote name='Elliot Cannon' date='Oct 24 2008, 06:46 PM' post='1094600']
[quote name='Todd Enlund' date='Oct 24 2008, 12:59 PM' post='1094538']
[quote name='Elliot Cannon' post='1094533' date='Oct 24 2008, 11:54 AM']
You can't PULL a liquid!
[/quote]
Yeah, but if the pump is lower than the tank, it could still be located in the engine bay... fuel would run to the engine bay even without a pump

That's exactly my point. If the pump is lower than the tank, the static pressure to the pump is the same, weather the pump is in the front or the back.

[/quote]
This is getting deep. Ok, yes static pressure is the same front or back depending on the height the pump is mounted . The fuel line is a restiction to flow. The longer the line from the tank to the pump the more restriction to flow from the tank to the pump. The harder the pump will have to work for the same difference in pressure. It's only a pair of 44 webers.

Steve

Posted by: Phoenix 914-6GT Oct 24 2008, 05:34 PM

So I need a new pump and am going to locate it to the front. Is the CB good for my six and what regulator did you guys use?

Yes Todd... I am hijacking your thread... kinda

Posted by: Mark Henry Oct 24 2008, 05:42 PM

For me it depends on the HP, faucet, CB are OK till about 140- 150hp, after that they will lean out your engine bad as they can't keep up.

After 150HP I use a Holley pump and regulator.

BTW The little silver round pressure regulators are pure junk.

Posted by: zx-niner Oct 25 2008, 12:23 AM

How do you think a straw works?

Posted by: Phoenix 914-6GT Oct 25 2008, 12:40 AM

Oh geez.... this again

There was a big thread about this about six months ago or a year ago.

Posted by: rhodyguy Oct 26 2008, 01:43 PM

why the big rush to relocate the pumps to the front? the cb will mount nicely to the rear of the lower firewall. you'll either have to figure a way to splice into the stock wiring at the rear so you can use the relay and fuse or run to a keyed terminal off the interior fuse panel. carry fuses with the later.

k

Posted by: Elliot Cannon Oct 26 2008, 02:00 PM

You lower the pressure in the straw and the liquid is "pushed" through by outside air pressure. It was all explained to me when I bought the manual that also included this explanation for how them airplane things fly.



Attached image(s)

Posted by: ericread Oct 26 2008, 02:07 PM

Great post - I wondered how an airplane gets airborne!!!

Eric

Posted by: Mikey914 Oct 26 2008, 04:31 PM

As an airline pilot I can summarize how aircraft fly .....PFM
Pure F'n magic
But seriously, it should work either way, just lie a hydraulic pump, which basically it is.