68 911 Fuel Pump Questions

[MrJTP2001]

My decade long rebuild of my 68 911 Sporto is almost over. The engine and carbs have been completely rebuilt and the transmission is being checked, new brake and fuel lines, new wheel bearings front and back, body work 90% complete, front and rear suspensions reworked, instruments cleaned and calibrated, etc, paint in about 2 months. BUT, I've read so many posts on fuel pumps that now I'm confused. The box-of-parts from the PO contained 2 Hardis and one Pierburg. The PO says the Hardis don't work and he never go around to trying the Pierburg.

I've read articles that the pump should be moved to the front, I've also read articles that say to leave it where the factory put it. Other articles say to be sure to add a return line to the tank but other articles say the Hardis don't need a return line or a regulator.

I would prefer using a Hardi because, so far, the car is completely original and the electrical panel in the engine room has the Hardi mounting bracket.

So, I thought I would just put the question out and see what I can learn from the responses. I'll absorb all responses and come up with a plan.

Thanks in advance.

[lars1965]

Hi Tony

You should go with the hardi, original to the car , no return to the tank is correct, and put out the correct pressure 3.5 psi
+ ad a fuelfilter
leave it in the rear where it belongs.

Lars

[Harvey Weidman]

Ed Mayo had the best set up for this. New, looking like old. I don't know how to link his post though.
H

[JT912]

My '68 Sportomatic has the Hardi setup in the original location.

[edmayo]

Ed Mayo had the best set up for this. New, looking like old. I don't know how to link his post though.
H

My application used the used the new Facet tricked up to look like the Bendix pump, not the Hardi. And I concur, put the Hardi in the engine bay, I know in theory that isn't as good as a front mount,,,,,but it has only worked fine for 45 years

[911 TR 68]

Edmayo,

It needs to install a return fuel line and a fuel pressure regulator combined with the Facet pump in a 911 swb ?
Thanks

[edmayo]

No, you don't need a return line or a pressure regulator as long as the Hardi has the correct pressure in its design, about 3 to 3.5 pounds per sguare inch of pressure.

[MrJTP2001]

Well, that was fast. The responses are appreciated and I will get busy and check out why the Hardis don't run.

Thanks to all.

[911 TR 68]

There are 2 Facet fuel pump model . In an S engine you should choose the Facet, "red top" fuel pump.