Fit 8mm copper,
easier to fit and clip, plus MUCH more Locost. 
Ray
Seeing as my prop/RGB isn't yet in, I'm thinking about sticking in a 2nd fuel pipe for the fuel return for when I change to injection.
If I was to drop in another length of 8mm copper, how would I terminate the end in such a way as to cope with the pressure of an EFI system.
Surely I can't just use hose clamps on the rubber hose (over the copper) without any barbs on the copper?
Or should I just put in a stainless overbraided rubber pipe from end to end for the feed and use my old copper for the return (low pressure).
ta
Chris
Hi
soldering an olive was suggested, see
http://www.locostbuilders.co.uk/viewthread.php?tid=51655
Adrian
I've got Rubber FI hose thats a tight fit pushed over Copper Fuel pipe with just Jubilee clips on and its held fine.
Not that thats the best or right way to do it but it does withstand the pressure ok.
I've got a copper flaring tool, just didn't really think it was the best way of doing it.
No reason I can't just use a decent rubber FI hose from end to end?
Copper is probably cheeper than Rubber or Braided FI hose for doing longer runs, and would need clipping less and be more resistant to any chaffing.
I've just got hose pushed straight onto 8mm pipe and it's fine. Fore reference, the high pressure inlet on my gsxr 750 fuel rail is also just a plain tube so suzuki must also think it's ok. Try pulling the hose off once the jubillee is done up - bet you can't!
The return pipe doesn't see any pressure anyway, it's the feed pipe you normaly have to worry about.
quote:
Originally posted by MikeRJ
The return pipe doesn't see any pressure anyway, it's the feed pipe you normaly have to worry about.
I just soldered olives on the ends of all my fuel lines, and it has been totaly secure. But would agree with what others have said, you actualy dont
probabley need them, as most manufacturers just fit a straight end, and clips, and they dont come of. Belt and braces mentality. Fit 8mm copper,
easier to fit and clip, plus MUCH more Locost. Ray
just to second the others, have used plain copper 8mm pipe MANY times and never had it come off with 65psi fuel pressure.
having said that I have sometimes put a male single flare on in the past (use a 5/16" tool its nearly right) and this give a small
"bulb" on the end of the pipe for peace of mind
I have just used good quality jubilee clips, but doubled up on the clips to be safe. I tested these to 10 bar & they held up OK.
Regds
Ian
Personally I would solder an olive on the end of the copper pipe, then use a suitable rubber fuel pipe (Injection grade) and secure with jubilee
clips.
I do not beileve that a pipe secured with just a jubilee type clip and no raised section to stop it sliding off the end is secure enough. A 60psi fuel
leak makes a very dangerous flamethrower in you car. Its NOT worth risking it for a 10p olive and 1p's worth of solder and 5 minutes of time.
Even Water pipes on your car have a raised return to stop the pipes popping / sliding off the end of the metal pipe,
IMHO it costs next to nothing to do, and is a major safety issue if it all ges wrong.
quote:
Originally posted by the_fbi
I've got a copper flaring tool, just didn't really think it was the best way of doing it.
No reason I can't just use a decent rubber FI hose from end to end?
quote:
Originally posted by Scoobylav
the_fbi for reference we are running the feed and return on our injection in rubber hose for their entire lengths. Much easier to work with than copper pipes.