Fuel pump help needed

[Uncle Enzo]

Before I go ripping into her this weekend, I wanted to make sure I have everything I need.
Below is the pump I have:

This is what is going in:



Any advise would be most appreciated.

[The cap'n]

Part numbers would be helpful. You'll need a replacement banjo fitting for the hose, 2 copper seal rings, a couple of FI style hose clamps appropriate for the hose, and the cap for the end of the check valve (seen on the left end of the pump as pictured). You're also gonna need some way to cut the collar off the hose where it attaches to the existing banjo fitting. Last time I did one of these, I used a hacksaw blade and took my time. You DO NOT want to nick, cut, or otherwise damage the hose! I recently did this job ob a '77, which has a pump similar to the one you're using as a replacement, but has a smaller check valve. In your case, you're gonna have to make sure everything reaches before you begin the work. I was able to find a banjo fitting on line, and now have a couple of spares. If you need one, gimme a PM and we can arrange a deal.

The Cap'n

[Uncle Enzo]

Thanks for the great input. I really wish there was a direct plug and play pump for the mid years.

[Flat6pac]

Research the company that rebuilds pumps here before cutting wires.
Bruce

[Uncle Enzo]

Here is the part no. for the original
0580254985

[Howard M]

What is the part number and source of the replacement. I'm watching because this project is in my future.....sooner or later.

[Uncle Enzo]

the replacement part no is 0580.464.126 I got it from Mesa Performance but our host has the same item.
looks like it is going to take some work to get this this fit. The OEM pump is just about impossible to find.

Stay Tuned!

[BoxsterGT]

76 is the year Porsche started moving fuel pumps and superseding everything.

Your original pump, where was it mounted? In the rear? You are replacing it with a front pump, which is really best but it will take a bit of upgrading. You need all the mount hardware from the SC or later 911 and some replacement hoses & lines & fittings.

I do have the hoses & fittings to fit your new pump either at front or rear. I will try to post a few photos that may help. Right now I am on the wrong computer for that.

Len at Autosportengineering dot com. I do not accept PMs.

[Uncle Enzo]

Thanks, Len. The pump is located at the front of the car. It looks like a need to get the right fittings and I shoud
Be good. I'll shoot you an email to
Get the discussion started.

Thanks! -Vince

[Flat6pac]

I have the mount for the pump for front.
Bruce

[BoxsterGT]

Don't think I ever got your email.

I am curious as to your build date. Your pump is mounted up front and is Model Year 1976.

I know the 1975 models had their Fuel Pump at the rear. Just trying to build a data base on when Porsche did what when it comes to superseding fuel components.

Once you locate your pump, I have banjos & other fittings and E-85 rated hose to help w your install.



Perhaps you could post a photo of your existing front hoses. The early CIS cars like yours had a 10mm Banjo, but your new pump will likely have a 12mm Banjo.

Len

[Howard M]

Len, my stock '76 (late build) also has a front mounted pump.

[The cap'n]

Originally Posted by Howard M

Len, my stock '76 (late build) also has a front mounted pump.

''Then all you need is the 12mm banjo fitting, the cap, a couple of washers, and a couple of FI hose clamps. Best to get a barbed banjo fitting, as they allow a better grip for the hose. That replacement hose shown above would be nice, but you still have to carefully remove the swaged hose clamp where it meets the hard line.

The Cap'n

[tocobill]

Why not just cut off the banjo fitting and get a generic inline fuel pump with nipples. Can be bought at any local car parts supply and can also run a inline filter before the pump too.

Spectra Premium/12 Volt 3 to 5 PSI 20-30 GPH electric fuel pump for carburated applications (C1025EP) | Fuel Pump | AutoZone.com

Just a quick on I found. Lots of options and varied price ranges. Easy to install and replace later if needed.

[Uncle Enzo]

Thanks Taco. I am thinking that bypassing the banjo all together is a good move assuming ive got enough hose to play with.

[BoxsterGT]

This is what you must end up with if you replace the original hose alone........



It's a high pressure system requiring proper factory type Norma or Oetiker hose clamps to be safe. And this is still a temporary repair. The permanent way is with new tunnel lines and new crimped hoses............



The only time you can use a generic inline pump is when you have Carbs at 3-5 psi system pressures. The factory CIS runs at 60 psi and higher, and requires the very best of fuel injection lines, hoses & fittings.

Look how long the original system has lasted. These cars are becoming more valuable as they age. I would say its best not to compromise with what the factory has proven to work.

Len

[Uncle Enzo]

I am running carbs, I should have mentioned that. However, I do have a PR at the end to knock it down to 3psi. Len, you've got mail.

[Uncle Enzo]

https://www.flickr.com/photos/vincentpuopolo/10147317386/

[The cap'n]

Originally Posted by Uncle Enzo

I am running carbs, I should have mentioned that. However, I do have a PR at the end to knock it down to 3psi. Len, you've got mail.

It's NEVER a good idea to attempt to reduce the operating pressure of a pump that puts out 80 PSI, or more, down to 3-3.5 PSI. Enthusiast sites are filled with stories about this. Just search for "fire". I've seen it in person, too, even in former MFI cars where the pressure is only 6-7PSI.Seriously, you need a fuel pump designed for use at the pressure you need. Gonna be a LOT cheaper, too. We'd like you, and your car, to be around for a while ........................... Although the above mentioned pump from Autozone is likely junk (most of their stuff is), it's a step in the right direction. Might want to look at Jegs, or Summit, or contact PMO and see what Richard recommends. I use a small Pierburg pump on my 911, and it's been fine for years.

The Cap'n

[Uncle Enzo]

The car has been running carbs since 84 w/o issue, I really don't want to screw up a perfect running machine.
So just the PR and go straight out to the carbs with a pump designed for such pressure?