Running Fuel And Brake Lines Through Cabin

[Smity42]

Hi Guys,

I need to run new fuel and brake lines on the track car (and clutch too, stupid transaxle), and I was wanting to put them in the cabin to keep them protected.

Is this safe? I had a look in the cams manual and all I could find was for rally cars (Shedule R, Section 13) that says it is OK.

I plan to run bulkhead fittings at the front and rear of the cabin and solid lines between them with no joins, and no flexi hose, with the exception of the rear brake line which will need to connect into to a hydro handbrake and bias adjuster so there will have to be joins there.

What tubing is best to use? I have heard good old steel 'bundy' tube is the best option as ally and stainless are more brittle and will crack?

Cheers,

Martin

[2pee]

Rules on fuel and oil runs should be in the category regs not the schedules. Other than Nascar, can't remember anything prohibiting brake/clutch fluid line in cabin.....and the past and present car would be in the doo-doo if that was the case.

In the 2nd category they do have some specification on lines. The 3rd category one I'm familiar with, permits fuel in cabin with only bulkhead fittings and no other joins, no spec on whether flexible or hardline either.

You'd be hard pressed to look past bundy for brakes, fwiw, annealed stainless is used in some aircraft fuel systems, vibration support being the important aspect.

[blackrex]

If there are no joins in the cabin, then there should be no issues from scrutineering. The reason that Aluminium and SS are advised against is that they become work hardened from the constant vibration present in the car, this leads to fatigue cracking and failure of the pipework.