hardline to flexi hose, best method

[Frankychops]

i've some 8 and 6mm hard lines(Cupronickel), part of a 240z bare shell rebuild.

whats the best method to go from hard lines to flexi fuel hose? any links to fittings?

[darreni]

Try HEL performance, vey helpful in my experience;

https://auto.helperformance.com/custom

[GreenV8S]

You want a connector with a compression fitting on one side and your preferred hose connector on the other. They're readily available - you just need to ensure you get the right size olive for your hard line.

ETA: Here's one using Fragola parts:


Starting from the top:
Nut and olive for the hard line connection.
Male-to-male adapter
AN fitting, olive and nut for the hose connection.
You could use a barbed connector on the outlet instead if you aren't using compression fittings on your hoses.

Edited by GreenV8S on Sunday 23 February 18:36

[donkmeister]

In another thread someone had repaired a hard-line, and fortunately had used flared connections instead of compression. The MOT rules were linked to, specifically this:

Repairs to the pressure lines of hydraulic brake systems are unacceptable unless suitable connectors are used. Compression joints of a type using separate ferrules are not suitable.

So, when hardline meets flexi, is a compression fitting definitely allowed?

I'm struggling to see why compression could be used in one application in a brake line but not the other.

[GreenV8S]

Brake lines work at much higher pressures than fuel lines. You might see 100 psi in a fuel line, but you'll easily see 1000 psi in a brake line.

[donkmeister]

I missed the critical word "fuel" in the OP.

Thank you!

[Belle427]

A lot of cars will just use a high quality fuel hose straight on to the hard line with the correct hose clamps. Ok its not the most professional route but done properly it works.
Ive seen suggestions of flaring the hard line or compressing an olive on the pipe for extra security but try putting a new rubber hose on a hard line and then getting it off!