Carl Fausett

We have taken up rebuilding the L-Jet and LH-Jet fuel lines that are no longer available (NLA) from Porsche.

Example below is the line with two fittings that runs between the two fuel rails at the rear of the motor.

They are cracking and aging (of course) but on top of that now fellas are installing adjustable fuel regulators on these cars, maybe a supercharger, and dialing up the pressure. The old hose is rigid and does not take new experiences well.

We purchased a hose swager and located some very-hard-to-find metric hose swages. We are using this with the 350 psi Metric Fuel Line we had already sourced.

Pictures below show the results.

This will be a you-send-yours-in-and-we-rebuild-it-and-send-it-back deal.
I have found variations in hose length before, and by making them custom to the length of your old hose and re-using your fittings - we know that it will fit and work on the car it came off of.

I can turn them around in 2 days or less so you are not without your 928 long.

I do not have it up on my website yet - but it will be priced at $55 per hose, plus $9 shipping UPS Ground.

ROG100

Carl,
Great and about time someone came up with a complete hose.
What is the min bend radius of the hose as that would be the only item that would concern me?
Thanks,
Roger

Carl Fausett

We match the length and bend radius of the hose we replace.

ROG100

Hi Carl,
Sorry that did not answer my question - but never mind.
I had some other applications I was interested in using your hoses for particualrly as you have a crimping tool, however the bend rad is critical.
All hoses have a min bend rad and I was looking for that.
As an example EFI hose has a min bend rad of 3.5"
As you move up the pressure scale this can have an effect on the bend rad.
Yours is higher pressure hence the question.

Carl Fausett

I understand. Two thoughts -

1) While I do not know the minimum bend radius of this hose, I do know that Porsche engineers know what it is, and thats another reason why I measure the hose in the assembly I am sent and I mimic it.

2) If the bend is very tight, you should be in a metal 90 or 45 degree fitting, or a metal tube. You are correct to avoid very tight bends with a rubber hose. Use a metal fitting first if that is your application.

These two reasons render my need to know the minimum bend radius of this hose moot.

We can rebuild almost any OEM line with crimped fittings that a user sends us, and that includes the ones on CIS cars back by the fuel accumulator, on LH-Jetronic cars in front of the motor in and out of the fuel regulator, etc.

Although I choose this particular fuel line as an example (because it just was listed NLA by Porsche) there are plenty others that we can assist with on the car.

I also sell the rubber HP hose in 1 meter lengths for the do-it-yourselfer.

See here: http://www.928motorsports.com/parts/hipressfuelline.php

rixter

thanks for the pics earlier Carl, nice job
this is the the S4 version, per my previous thread it is now NLA

Bill Ball

Kudos to you again, Carl.

Jim R.

Nice product Carl!

I'll be needing those for the Stage 3 upgrade going back to the stock fuel pressure regulator.

Jim

a4sfed928

Carl, The "Minumum Bend Radius" RG100 is referring to is a hose specification on the bulk you are using not on the line you fabricated.

H2

Thanks, Carl, for offering this service. It looks like a professionally made product. Is there a way to pressure test the fittings for integrity (no leakage under pressure) before use?

Harvey

heinrich

I think it needs to be a metal line

ROG100

H,
The engineers put that bend in for a reason I think.
Possibly to absorb pressure thrust from the regulator/dampeners.
A rigid tube would not absorb that kind of movement.
On the other hand a rigid tube bent like the original would absorb some movement but the life of the tube would be suspect.
It could also be subject to vibration possibly and at certain natural frequencies could also be a problem.
Food for thought.
Roger

icsmike

I one one these made yesterday at a local hydraulic hose making company for about $17.50!!

ROG100

This is interesting reading
http://www.gates.com/common/download...chTipsForm.pdf

Jim bailey - 928 International

Roger if the alloy engine expands so much that the timing belt "detensioner" must reduce the tension then it is safe to assume that the heads which are on a 90 degree angle would also stress a hard line or the injectors if that were how the two injector rails were attached. The early cars 80-84 use hard line (on the front) BUT the injectors each have rubber hoses which is NOT how the 85-95 injectors are mounted. For the same reasons the intake manifolds ALL use rubber somewhere in the design to allow for the growth of the engine when hot.