Fuel pump relocation front or rear? Type? Options

[Joec]

Brand new to the 914 world. My car, a 74 2.0 was parked for 25 years, bought as a roller. Now missing the fuel pump( among other stuff) looks like it was plumbed for a 2 port pump anyway as 1 line to the injectors with a return line only at the end of the run, no y connector. I plan to replace all of the fuel lines so now is the time to place the pump. Seems real easy to place on firewall as lots of room there. I have read countless articles but not much recent stuff and most are vague with instructions assuming I have full comprehension of the car, which I don't. It sounds like stainless lines in the tunnel are a must, what fuel pump is suggested? Front or rear?,modify and put in tank?? Suggestions or point me to a current article. Any help really appreciated.

[914werke]

Not advise I would take. They are almost 50 year old plastic not designed to hold the pressure of the Fuel Injection system, just the weight of the fuel in the tank.

Again .. MISINFORMATION! (IMG:style_emoticons/default/dry.gif)
Ill agree tunnel lines can leak in stock form, but the incidence is (very) low and usually the causal reason is more likely abrasion from PO tinkering than simple pressure.
While its true early cars (70-74) were equipped with tunnel lines that were not designed /spec'ed for the hi-pressure use of the OE FI pump relocated to the front,
I continue to see cars that had been converted like this & have been running & driving for decades.
The late cars 75-76 have PLASTIC (Nylon?) lines that ARE rated for high pressure.
My own experience from breaking many many cars is that the tunnel lines are usually quite pliable and are likley to continue to perform as designed, in most cases.

But use common sense & don't succumb to Internet FUD!
All these cars are nearly 50 years old & its doubtful that Hans & Wolfgang engineers spec'ed these components to last this long.
Add into the mix they carry fuel formulations that are significantly different from the 1970's ... IMO its not a bad idea to replace those lines (in particular early) but to bang the gong that "your all gonna die" unless replaced is irresponsible.

More importantly, if still equipped with OE lines check them at the exit of the firewall in the Eng. compartment.
This where they are exposed to EXTREME HEAT and can degrade crack & cause fires. (IMG:style_emoticons/default/bye1.gif)

Fire away (IMG:style_emoticons/default/happy11.gif)

[930cabman]

Not advise I would take. They are almost 50 year old plastic not designed to hold the pressure of the Fuel Injection system, just the weight of the fuel in the tank.

Again .. MISINFORMATION! (IMG:style_emoticons/default/dry.gif)
Ill agree tunnel lines can leak in stock form, but the incidence is (very) low and usually the causal reason is more likely abrasion from PO tinkering than simple pressure.
While its true early cars (70-74) were equipped with tunnel lines that were not designed /spec'ed for the hi-pressure use of the OE FI pump relocated to the front,
I continue to see cars that had been converted like this & have been running & driving for decades.
The late cars 75-76 have PLASTIC (Nylon?) lines that ARE rated for high pressure.
My own experience from breaking many many cars is that the tunnel lines are usually quite pliable and are likley to continue to perform as designed, in most cases.

But use common sense & don't succumb to Internet FUD!
All these cars are nearly 50 years old & its doubtful that Hans & Wolfgang engineers spec'ed these components to last this long.
Add into the mix they carry fuel formulations that are significantly different from the 1970's ... IMO its not a bad idea to replace those lines (in particular early) but to bang the gong that "your all gonna die" unless replaced is irresponsible.

More importantly, if still equipped with OE lines check them at the exit of the firewall in the Eng. compartment.
This where they are exposed to EXTREME HEAT and can degrade crack & cause fires. (IMG:style_emoticons/default/bye1.gif)

Fire away (IMG:style_emoticons/default/happy11.gif)

Replacing the original "plastic" fuel lines is probably not a bad idea. Does anyone know what the plastic is? I am new to the world of things 914 and have had exposure to a 1974 and (2) 1975 models. Yes, the original fabric covered fuel lines are very brittle and must be replaced, but the original plastic lines are pliable. Again, probably safe to replace with new St Stl tubing, but when?

[Steve]

Not advise I would take. They are almost 50 year old plastic not designed to hold the pressure of the Fuel Injection system, just the weight of the fuel in the tank.

Again .. MISINFORMATION! (IMG:style_emoticons/default/dry.gif)
Ill agree tunnel lines can leak in stock form, but the incidence is (very) low and usually the causal reason is more likely abrasion from PO tinkering than simple pressure.
While its true early cars (70-74) were equipped with tunnel lines that were not designed /spec'ed for the hi-pressure use of the OE FI pump relocated to the front,
I continue to see cars that had been converted like this & have been running & driving for decades.
The late cars 75-76 have PLASTIC (Nylon?) lines that ARE rated for high pressure.
My own experience from breaking many many cars is that the tunnel lines are usually quite pliable and are likley to continue to perform as designed, in most cases.

But use common sense & don't succumb to Internet FUD!
All these cars are nearly 50 years old & its doubtful that Hans & Wolfgang engineers spec'ed these components to last this long.
Add into the mix they carry fuel formulations that are significantly different from the 1970's ... IMO its not a bad idea to replace those lines (in particular early) but to bang the gong that "your all gonna die" unless replaced is irresponsible.

More importantly, if still equipped with OE lines check them at the exit of the firewall in the Eng. compartment.
This where they are exposed to EXTREME HEAT and can degrade crack & cause fires. (IMG:style_emoticons/default/bye1.gif)

Fire away (IMG:style_emoticons/default/happy11.gif)

Replacing the original "plastic" fuel lines is probably not a bad idea. Does anyone know what the plastic is? I am new to the world of things 914 and have had exposure to a 1974 and (2) 1975 models. Yes, the original fabric covered fuel lines are very brittle and must be replaced, but the original plastic lines are pliable. Again, probably safe to replace with new St Stl tubing, but when?

Personally it's cheap insurance, why not replace the plastic lines with SS lines?
Do you have to, probably not, but for the price why not? They are easy to install and cheap. I got mine from rotary914. On my car, I replaced everything that was functional rubber or plastic. i.e fuel lines, brake lines, suspension bushings and shift bushings.

[windforfun]

Not advise I would take. They are almost 50 year old plastic not designed to hold the pressure of the Fuel Injection system, just the weight of the fuel in the tank.

Again .. MISINFORMATION! (IMG:style_emoticons/default/dry.gif)
Ill agree tunnel lines can leak in stock form, but the incidence is (very) low and usually the causal reason is more likely abrasion from PO tinkering than simple pressure.
While its true early cars (70-74) were equipped with tunnel lines that were not designed /spec'ed for the hi-pressure use of the OE FI pump relocated to the front,
I continue to see cars that had been converted like this & have been running & driving for decades.
The late cars 75-76 have PLASTIC (Nylon?) lines that ARE rated for high pressure.
My own experience from breaking many many cars is that the tunnel lines are usually quite pliable and are likley to continue to perform as designed, in most cases.

But use common sense & don't succumb to Internet FUD!
All these cars are nearly 50 years old & its doubtful that Hans & Wolfgang engineers spec'ed these components to last this long.
Add into the mix they carry fuel formulations that are significantly different from the 1970's ... IMO its not a bad idea to replace those lines (in particular early) but to bang the gong that "your all gonna die" unless replaced is irresponsible.

More importantly, if still equipped with OE lines check them at the exit of the firewall in the Eng. compartment.
This where they are exposed to EXTREME HEAT and can degrade crack & cause fires. (IMG:style_emoticons/default/bye1.gif)

Fire away (IMG:style_emoticons/default/happy11.gif)

Replacing the original "plastic" fuel lines is probably not a bad idea. Does anyone know what the plastic is? I am new to the world of things 914 and have had exposure to a 1974 and (2) 1975 models. Yes, the original fabric covered fuel lines are very brittle and must be replaced, but the original plastic lines are pliable. Again, probably safe to replace with new St Stl tubing, but when?

Personally it's cheap insurance, why not replace the plastic lines with SS lines?
Do you have to, probably not, but for the price why not? They are easy to install and cheap. I got mine from rotary914. On my car, I replaced everything that was functional rubber or plastic. i.e fuel lines, brake lines, suspension bushings and shift bushings.

Good job. Right on!!! Do you want to sell your car? I hate gasoline. BTDT.

(IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/smile.gif)