Best strategy for replacing fuel hoses, and supplier

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rhd racer
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Re: Best strategy for replacing fuel hoses, and supplier

Post by rhd racer »

What I mean is, with your plan of connector A to connector B via a braided fuel line, you will end up with an assembled version of this picture.

This kit is for self assembly, so instead of having to cut the braid back, insert and clamp the line, then neatly finish the overbraid (which will cost you skin or splinters, or both!), Pirtek or similar will put these red ends into a press and finish for you. You then have say a couple of 3m fuel lines with a -4 or similar thread on the end. I am just suggesting that anywhere you have a threaded end, get a plug for it because you can easily then close the circuit.

Image

I am not so familiar with the earlier cars in original form, but it seems that even with MFI they use some standard rubber fuel hose, connectors, so you may need to use both of those links to do different things on the system. Either to connect from low to high pressure and then to plug. That blue one is beat, I have always used a Philips screwdriver and hose clamp!!


I was assuming that FI was all high pressure like it is on the later cars in my suggestion, but I think you can probably achieve a long life fuel line that adapts to either traditional flexi or hydraulic style connectors easily and cheaply. It just doesn’t look OE, but then it is safe on all fuels etc and won’t deteriorate.

Hope that all makes sense


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93 964 C2
99 Boxster 2.5 > 3.4 hill climber

71 914/6 3.0 - gone

'You see Paul, hill climbing is like making love to a beautiful woman. You get your motor running, check your fluids, hang on tight and WHOA..30 seconds later it's all over!' Swiss Tony
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hot66
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Re: Best strategy for replacing fuel hoses, and supplier

Post by hot66 »

low pressure all the way to the MFI pump ( distrubution pump ) .. from there it is solid lines to the injectors

the solid lines within the feed and return are generally where they pass through the body. Think Id prefer to keep original style ( but upgraded for ethanol) fuel lines which can be visually checked easilly for splits / hardness etc rather than braided everywhere ... but thats just me
James

1973 911 2.4S
1993 964 C2
2010 987 Spyder

1963 Honda C100 Supercub

Its not how fast you go, but how you go fast ;)
rhd racer
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Re: Best strategy for replacing fuel hoses, and supplier

Post by rhd racer »

Ah, ok, thanks for the lesson then James.

In that case, nothing wrong with a coil of copper pipe and running down the centre tunnel (8mm I think) and then flexi at either end. Again, a low cost option but closer to original (I did this on the 914 also when on carbs in its first iteration) and I think the coil cost me £30 (albeit 20 years ago). You could even get all posh and put a swage in each end
93 964 C2
99 Boxster 2.5 > 3.4 hill climber

71 914/6 3.0 - gone

'You see Paul, hill climbing is like making love to a beautiful woman. You get your motor running, check your fluids, hang on tight and WHOA..30 seconds later it's all over!' Swiss Tony
deano
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Re: Best strategy for replacing fuel hoses, and supplier

Post by deano »

[quote="hot66"]low pressure all the way to the MFI pump ( distrubution pump ) .. from there it is solid lines to the injectors

Yes, its all standard flexi hose + hose clips in from the heel panel to the fuel tank.

Perhaps it was just cheaper or more convenient to crimp on the T-section for the two fuel return lines, and to the end of the two short sections of hard pipe leading to the fuel filter console.... cant see any technical reason... I think it is perfectly safe to use a hose-clip versions.

Incidentally, the original hoses are all braided on my car, light tan coloured.

I understand the point of view of seeing issues if there is no braid, but I think it is there for abrasion resistance. The braid on mine seems to have saved the hose underneath from the welded on hose guides welded to the back of the rear seat. The braid seems to have what seems to be a pretty tough orange nylon or plastic strip running through it.

I rather like the black braided hoses for replacements...

Thanks for all the tips and opinions :cheers:
Dean
1973T Targa MFI 334 met blu- under restoration https://www.ddk-online.com/phpBB2/viewt ... 28&t=67060
1980 924 Turbo, blu/grn tartan - restored
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hot66
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Re: Best strategy for replacing fuel hoses, and supplier

Post by hot66 »

Sorry .. I meant the steel braided aeroequip style
James

1973 911 2.4S
1993 964 C2
2010 987 Spyder

1963 Honda C100 Supercub

Its not how fast you go, but how you go fast ;)
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