Fuel system - 71 911T w/Webers

[Jbizzle78]

I am currently replacing the fuel system in my 1971 911 T. Needless to say, it was a rig job, and the pump and filter were crappy aftermarket junk, so I ripped everything out. Tank, pump and filter. Also, the fuel hoses disintegrated in my hands so I am going to replace those, too.

What fuel pump and filter would you guys recommend for this setup?

When I did my research I saw that the factory fuel pump has three lines going to it and the one that I had only had two. Not only was my system setup with two lines, some of the hoses were still in the car, but blocked off.

How would you recommend I properly clean up the fuel system?

Thanks in advance..

P.S. I posted a picture of the fuel system that I removed. Hope you all get a good laugh.



Here is a picture of the 911 restoration.

[RWebb]

will it be stock?

any concoursification in the future?

[Jbizzle78]

Really, I just want to get it back on the road, running properly and efficiently. If that is accomplished by using factory parts, that will work but not necessary.

Thanks!

[RWebb]

use the new fuel line rated for EtOH - IIRC< Goodyear makes some - it has a liner in it

I'd mount a Bosch pump forward on the F crossbar like on the newer 911s - esp. good to avoid heat issues in your climate.

A recirc. type pump will last a long long time & you can use the overflow pressure valve setup from PMO to regulate the thing down to 3.5 for carbs

[if you don't have carbs, you'll need to duplicate a mfi setup]

use a Racor filter with water catching ability

[Jbizzle78]

I really would like to leave it in the stock location and keep it simple. Is there a pump and filter that is more compatible with the Carbureted 2.2T ? I'm trying to leave it as stock as possible.

Thanks for the information!

[m1franck]

The '71 fuel pump did have 3 lines to/from it. 1 in from the fuel tank, 1 out to the carbs and 1 return to the fuel tank. Sounds like your factory pump had been replaced with something else. Got a photo of it?

Fuel pumps push fuel better than they pull fuel. Also, fuel pumps last longer when they are not installed right next to the exhaust system, like on your '71. On my '71 911T I removed my stock Bosch fuel pump located near the left rear wheel well in order to make room for upgraded rear sway bar mounts and to use a fuel pump that was readily available and priced reasonably.

I installed an Airtex #E8337, 9PSI - 30GPH fuel pump up at the fuel tank and retained the fully recirculating fuel system by installing a PMO fuel pressure regulator in the engine compartment. Also, tapped into the stock fuel pump power wire, which passes conveniently near the pedal cluster, then rerouted it to the new fuel pump. Photos below show the work in progress of that conversion.

[Jbizzle78]

Thanks for the info and great pictures! I guess you guys have the right idea. Do you mind if I contact you for questions, during the process?

Thanks RWebb and m1frank!

[m1franck]

Sure, feel free to PM me. Also, I just added another photo to my post above showing where I accessed the old fuel pump power wire and then reused it for the new fuel pump.

[Jbizzle78]

What kind of filter? and where would you mount it?

[m1franck]

In regards to fuel filters, there are lots of options and opinions on that topic...

I have a later model fuel tank in my '71 for added fuel capacity, so there is a screen in the tank, that is integrated into the drain plug. I also, added an Earls 230106, 35 micron filter on the line going into the PMO fuel pressure regulator. It's the blue billet alloy part seen in the above photos. It's a cleanable/serviceable filter, so I check it a couple times a year. No water separation in my system, but I tend to pull my carbs every winter to check and clean them anyway.

[Jbizzle78]

Originally Posted by RWebb

will it be stock?

any concoursification in the future?

Which Racon fuel filter do you recommend? What size fuel hose would you recommend I use?

[RWebb]

Racor, with an r - search here using that term & you'll find more info & pics; not sure what model #

stock size hose should work fine; use the hose rated for ethanol from Goodyear or similar hose

what I hear is to use SAE 30R9 hose, not the older 30R7

[rsscotty]

If I were looking for a fuel filter, I would pay attention to the micron rating. The lower numbers are the best like seen on the Canton Mecca site. It would be preferred to have a 8 micron or smaller if it was a carb. motor. EFI motors a 1 micron. Just my two cents worth since you always see idle jets plugging up on Webers.

[jameshurst71t]

my original 71T fuel pump gave up the ghost and I swapped it with a Redline Weber fuel pump. It does not have the recirculating feature. My shop removed that fuel line. What are the pros and cons of removing the recirculating line?