[T3] Is there a real issue with using 5/16" ID fuel hose ratedSAE 30 R7 ?

[William J]

I agree on the hose using FI type like the  gates barricade carburated hose 
with a 50 PSI rating . It's not cheap yet I did find one online place that 
25 feet of it would be under $50 . They also have FI gates hose whcih is 
almost twice the price. I started a post on Samba asking about hose and 
ethanol fuels. The only one whcih holds up to oil seems to be the gates for 
carbs if I recall. I really have no idea how much longer the gate hose will 
last even though it has 5 different layers rather than two also from what 
I've read it does not like tight curves yet they don't define tight .

 So far and perhaps it's because I don't drive many miles per year or it's 
parked in a garage out of the elements, none of the goodyear 30R7 of the 
more expensive german FI have I have on my car has become hard or cracked 
which does not mean some section won't suddenly spring a leak . I had it 
happen in the past twice yet that was many years ago one was old regular 
5/16" fuel hose and another time it was that braided German stuff which 
sprung a leak in the hose across the L to R side of the engine.

 Another issue that I have read about is the tank and steel lines and the 
moisture drawn in causing rust yet it seems less common with FI because of 
the fuel running in a loop. I have no idea yet assume rust from water can 
still present an issue with steel tanks and steel lines. Then since later 
cars all with FI may have nylon tubing for fuel line some still have steel 
lines for the FI rail and their vacuum controlled regulator and run at 
higher PSI well above 30 PSI.
----- Original Message ----- 
From: <Bobsnotch at aol.com>
To: <type3 at vwtype3.org>
Sent: Tuesday, August 22, 2017 6:54 PM
Subject: Re: [T3] Is there a real issue with using 5/16" ID fuel hose 
ratedSAE 30 R7 ?


> In a message dated 8/21/2017 8:22:15 P.M. Eastern Daylight Time,
> catnine09 at dslextreme.com writes:
>
> I ask  because on doing a bit of research it seems in one site below from
> 2014  .
>
> https://www.hemmings.com/blog/2014/12/05/tech-101-fuel-line-hose-what-you-sh
> ould-and-should-not-use/#comments-block
>
> They  do not clearly state E-10 affects unlesss I missed it.
>
> I used regular  5/16" ID goodyear  30R7 everywhere other than the engine
> and used this  German FI hose that was expensive for the engine yet all it
> states on the hose  is  NBR?CR< 25/06/41  I have no idea hwat that means .
> Personally, I'd use FI rated hose IF I were redoing a system. It's  not
> that I don't think 30R7 hose isn't up to the job, but rather I'm not going
> back in there in 2 or 3 years and replacing it (all of it).
> I only say that, because most of us here think that the 30R7 hose is  good
> enough as a replacement, but we also think it'll last the 20 or so years
> the OE stuff did. The thing is, fuels have changed over the years, ethanol 
> has
> been added (granted it was 20 years ago). But the truth is you should be
> changing the 30R7 hose every 3 or so years, because it's drying out and
> getting  stiff. This leads to fuel leaks, and replacement of sections of 
> hose
> (or cutting  off the last inch of existing hose.
>
> I try to replace the fuel hose on my carbed cars every couple of years,
> because it's getting stiff.
> Bob 65 Notch  w/Factory Sunroof converted to IRS
>
> Bob 65 Notch  w/Factory Sunroof converted to  IRS
>
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