fuel lines

[chris davey]

Don't know the reasoning but QLD engineer told me I couldn't use copper fuel lines.

[STR8 2.8]

Don't know the reasoning but QLD engineer told me I couldn't use copper fuel lines.

as previously mentioned....
it work hardens much easier than steel lines. so over time it will crack.
hence it is illegal.

[celicaboy_2000]

I guess ill be redoing my fuel lines again... I guess the bundy is alot harder to bend into shape as well, double oh well gotta keep things legal.

[oldcorollas]

it's unlikely copper will work harden and crack just through vibration.

however, it is likely that in the course of a cars life, that occasional repositioning of the lines.. like when you bend it trying to take off the fuel filter .. could result in a small crack that you don't notice until the car is on fire.

if used and secured correctly, copper is probably safe, but that means bend once and secure it to the body so it can't move.
but, if you are using flared or double flared ends, it is possible for them to break just outside of the fittings, also causing leaks.

then again, EFI filters seems to get stuck on pretty hard, and it would be easy to accidentally twist a copper line tryign to get it off.

the bundy tube i have used (from enzed or pirtek) and seen has just been steel and single wall.. (or so it looked)

according to (bleh) wiki

Bundy tube, sometimes called Bundy pipe, is type of double-walled low-carbon steel tube manufactured by rolling a copper-coated steel strip through 720 degrees and resistance brazing the overlapped seam in a process called Bundywelding. It may be zinc- or terne- coated for corrosion protection. It is used in automotive hydraulic brake lines in cars manufactured in the USA since the 1930s.

steel lines are harder to form, but if you have even a half decent tube bendy, it's piss easy. then take to enzed/pirtek to get the fittings put on

[celicaboy_2000]

Where's the best place to by a tube bender? Also any idea what the price may be?

[schnitzel]

You have all missed important point on why copper is frowned upon, the additives in some fuels will react with copper and could possibly cause failure, that is why copper can be used for lpg but not for fuel.

Note it is not the petrol that reacts but some of the additives they put in some of the fuels.

Regards

[30psi 4agte]

hey guys im currently doing the fuel setup in my ke30, sr20, i was just wondering does anyone now if its legal to have braided line for my fuel supply and return or does it have to be hard lines ie steel.

cheers

FWIW i use braided line the whole length of the car. It is easier to instal and position .....but quite costly.

Depending on you ultimate goal for the engine . It might be worth using 3/8 fuel line insted of 8mm stuff which can become a restriction after 400 hp.

You might not be aiming anywhere near this .....but it is something to keep in mind and may prevent having to re-do the lines later on.

[CHB]

any one using a high pressure fuel hose(rating at 1000psi)? i'm thinking to change over my copper fuel line(which run inside my car)...
i've seen these rubber hydraulic hose rating at 1000psi at local store and we can clamp hydraulic fittings on it. could it be use?

[NeDiC]

i'n not quite sure what im going to do, i can braided at a very cheap price as my uncle works for pertek, but it still is alot more expensive then using steel. i guess i'll jus weight up my options

cheers guys

[allmtr]

I'm running 10mm alloy tubing for Motorsport Connection in Seven Hills. $26 dollars for 10ft. Bend by hand

[Yotaholic]

Good thread !! I'm also upgrading the old lines and using 3/8 steel. The metric lines and fittings are hard to get here so i'm forced to drill out the metric fitting that adapts to my 1j anyway I would consider getting one of these little babies for any fuel or brake line work . I really hate it when your almost finished the last bend and KINK !!! Shit !!! So this bender costs 10 bucks and will be your new best friend Hope it helps !!

KD tool part # 2517

[CHB]

how you mount the fuel line to the chassis?

[STR8 2.8]

how you mount the fuel line to the chassis?

[o_man_ra23]

Poke your nose under your car and have a look at the original mounts, they are steel straps which have bolts holding them in place.

Braided lines should be ok, but unnecessarily expensive. Just as good a job can be done with bundy tube, and if your ol boy works for Pirtek, then it will be a cakewalk to bend it. Plus braided lines are harder to attach to the car.

Cheers, Owen

EDIT: Beaten to it

[CHB]

where do you guys normally buy the Adel clamps from? i walked thru many electrical wiring shops but none of them sell it..