This has been covered before but not quite in this format. I am not sure if I can fit my fuel line through the tunnel which leaves me two options.
I am using 3/8s high pressure rubber line .
I am left with running it internal through the upper tunnel frame rail or running to run a conduit in the passengers compartment sealed at each end of the compartment and run the lines internal to the conduit. I would think that the fuel line inside a conduit should be safe?
Dale

Is there any reason you can't use a hard copper/cupronickel/plastic line down the tunnel? That'd be the easiest and safest way (IMO)


Of the other 2 options, I'd personally not be happy with either in the event of a crash; I'd be worried that if a tube bent, it'd risk crimping the pipe, possible leak into the frame.

Conduit, depending on type strikes me as having similar issues, but in the passenger compartment.

Also, as soon as you stick a rubber hose down a metal pipe, you risk chafing, especially at the ends, and on any imperfections in the pipes.

Another point is that if its hidden way in a metal or plastic tube how can u check in the future if the fuel line has started to fail? There no way of knowing until the tube is full of fuel!

I've run both my fuel and brake lines for the falcon along lower interior of the tunnel. The fuel lines in microbore copper pipe under the soundproofing. If the car was that deformed it had crushed the pipe it wouldn't really matter anyway...

If i was building again i wouldnt use rubber, even braided, for the main long runs. Defo go for copper or kunifer. I used 5/16" kunifer on an injected mk1 golf a few years ago. Will probs use the same on the mini too. Reserving rubber only for areas where flexibility is needed. You only have to read one story of perishing fuel lines to make this decision, and its not really that much more work to fit the hard lines.

You can get plastic fuel pipe (nylon?) might be an option for you?? Simpler to route than copper/steel..

Dan

[Edited on 20/8/09 by Bluemoon]

Use metal line through the tunnel, held on by P-clips, fuel line from CTC P-clips from NAPA.
Fuel line through any tube which might later get a pop rivet is going to cause a problem, I did think about running wires through on of the chassis tubes, but you can't support it away from chaffing on the interior of the tube, same with fuel line.