Type 44, NLA fuel line conundrums

[Cody Forbes]

The 930 lines are all steel tube hardline from the metering unit to the injector, no braided flex line involved. Only one generation of the 911's ever got braided flex line to the injectors, though it eludes me as to which currently.

On our cars I think they'll be fine for a long time to come. They aren't rubber that's rotting; the reinforced nylon should be quite long lasting. The larger lines from the pump to the metering unit are easily replaceable. AN-6 is even a direct fit to the fittings near the firewall with the same thread pitch and a compatible flare on the stock hard lines.

If one wanted to keep CIS it would be fairly easy to convert to stainless braided nylon/Teflon AN-3 hose (like an aftermarket brake hose) by cutting away the crimps and brazing some steel AN fittings in place. It would be time consuming though. I wonder if AN-3 would even be close enough to attempt to crimp back on. 

-Cody Forbes (mobile)

> On Jan 17, 2016, at 11:16 PM, <laraa at sympatico.ca> <laraa at sympatico.ca> wrote:
> 
> This guy, Len from http://autosportengineering.com/, can make CIS braided 
> lines.
> 
> That's what he wrote in this post 
> http://forums.pelicanparts.com/911-930-turbo-super-charging-forum/820323-digital-wur-plus-frankencis.html.
> 
> With 930s skyrocketing in value, (these were the last CIS/K-Jet cars in 
> North-America), there must be a solution to keep them 100% original.
> 
> Louis-Alain
> 
> 
> 
> -----Message d'origine-----
> De : quattro [mailto:quattro-bounces at audifans.com] De la part de DeWitt 
> Harrison
> Envoyé : 17 janvier 2016 21:33
> À : Quattro List
> Objet : Type 44, NLA fuel line conundrums
> 
> I've lately become paranoid about the eleven flexible fuel lines (injectors, 
> main supply, warmup regulator, etc.) in the MC1 engine compartment which are 
> all NLA according to one Denver area Audi dealership.
> So I thought that they could perhaps be rebuilt with fresh hose stock.
> 
> But having dissected one old Audi fuel hose, I'm currently of the opinion that 
> it would be a formidable task to rebuild these fuel lines to factory spec 
> because, after extensive surfing, I've learned the oe hose is a very 
> specialized construction and dimension with a nylon 12 core and a braided 
> steel reinforcing covering. It also appears that special tooling would be 
> required to assemble the hose to the hose ends (assuming the non-standard, oe 
> hose ends can be salvaged from used factory hoses). I do not think my local 
> hydraulic hose fabricator/rebuilder would be up to the task.
> 
> So ... any thoughts? Am I being too paranoid about these 28 year old fuel 
> lines? Are there hose fabricators who could rise to the challenge of 
> rebuilding to Audi original specs? (If they were simple rubber fuel lines, 
> replacement would be trivial, right?) Or would it be smarter to rip out the 
> whole CIS system and go with contemporary EFI?
> 
> Thanks for your ideas,
> DeWitt Harrison
> 1988 5ktq
> 
> 
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