Fuel Line size

Fuel Line size

Author
Discussion

tvrmk363

Original Poster:

375 posts

128 months

Wednesday 20th September 2017
quotequote all
Good afternoon gents,

I was messing around over the weekend and fired up the 350i. I smelled heavy fuel smell which wasn't two unusual because it does run a bit on the rich side. I looked below and the fuel was pouring out like a sprinkler head. Time for a replacement from the fuel pump forward.
What are the sizes of the fuel hose? I might try to replace with metal except for the couplings at the pump and regulator. Has anyone done it and what did you use?

Any help would be appreciated.

mrzigazaga

18,534 posts

164 months

Wednesday 20th September 2017
quotequote all
Hi mate


I had my feed replaced with kunifer copper pipe..8mm ID I believe..the small joins were rubber..good quality hose is advised....

Hope this helps.


Ziga

phillpot

17,105 posts

182 months

Wednesday 20th September 2017
quotequote all


The metal pipes, Cunifer or Copper are measured O.D. and the rubber pipe I.D. that way the rubber fits over the metal smile


........... 8mm or 5/16"

mrzigazaga

18,534 posts

164 months

Wednesday 20th September 2017
quotequote all
phillpot said:
The metal pipes, Cunifer or Copper are measured O.D. and the rubber pipe I.D. that way the rubber fits over the metal smile


........... 8mm or 5/16"
Ah it must of been 8mm OD copper with 5/16" ID hose...Cheers for pointing that out...


Ziga

tvrmk363

Original Poster:

375 posts

128 months

Wednesday 20th September 2017
quotequote all
Is there a reason for copper v steel? Corrosion maybe?

Steve_D

13,737 posts

257 months

Wednesday 20th September 2017
quotequote all
tvrmk363 said:
Is there a reason for copper v steel? Corrosion maybe?
Steel may well be used in a production car where the pipe can be production formed and fitted in one piece.
Steel is not compatible with aftermarket use as it is difficult to form without kinking.

Copper and Kunifer are easy to form and flare the ends.

It is said that copper is not ideal as vibration can cause it to work harden and fracture which is why kunifer should be your product of choice.

Steve

adam quantrill

11,535 posts

241 months

Wednesday 20th September 2017
quotequote all
Cunifer here too... better than pure copper as it's less soluble (apparently) so you don't get copper deposits at the far end (probably more important for carbs rather than EFI)