Excellent thanks guys much appreciated. Anyone got a link to correct empi steel pipe? also, do I really need engine out to do it? I fitted the existing hard line with it in when I replaced all the lines with biofuel ones on a ramp.
This is a single port but you get the jist of the routing. The reason not to use non ferrous metal pipe is because ethanol corrodes it but it does take a long time.
personally I wouldn’t run fuel through copper or Kunifer as it can work harden and fail due to vibration . Those clips I find are poor as well ... you won’t find either on a new car
Cupro nickel is fine for fuel lines etc, it was developed so that it doesn’t work harden like copper, those clips are to expensive fir production cars
Yep, even steel fatigues with vibration. Kunifer brake pipes, even more critical manage banging around on the trailing arms
I wouldnt worry about whether a pipe is cunifer or some other alloy. The water content in fuel is really quite low and internal corrosion takes years, unlike using any rubber pipe in the engine bay which lasts a fraction of the time because of the heat and the way the fuel softens the rubber. I had to junk my original metal pipe in that position because the grommet had vanished on the tinware and the pipe had almost sawn through. Just alter it so it is better secured. Ethanol is not corrosive by itself. Water mixed with fuel is the issue, but as delivered from the pump it should be dry (although we had issues with sailing club rescue boat engines with unmixed liquid water in petrol sold by a local yacht marina. Rain going down vents into storage tanks ..maybe )
There no fundamental metallurgical or mechanical reason for not using copper or even aluminium or stainless steel for fuel lines. It entirely a matter of thinking about the installation and not having long lengths of unsupported pipe, especially pipe that terminates in a joint to a rubber hose that dangles about in fresh air. All metals undergo fatigue cracking and all metals work harden to a greater or lesser degree. It's all about keeping the stresses and displacements low. What is true is that steel pipes offer a greater margin for poor layout and installation.
