A Replacement for a NLA Fuel Line
03-30-2007, 08:15 AM
#31
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Originally Posted by ROG100
Dave,
Different to the 87S4 I just modified.
Maybe a later S4?
Roger
Different to the 87S4 I just modified.
Maybe a later S4?
Roger
Post #6, is the same as the hose from my '87 S4.
Last edited by DonT; 03-30-2007 at 08:30 AM. Reason: correction
03-30-2007, 08:35 AM
#32
Here's a pic of how mine turned out, with before & after pics. I used new EFI rated lines, about 8-9" in length; my original 90 degree fittings; one set of new EFI clamps & reusing one set. Ended up with two "U" shaped hoses. I made sure the hose on the right doesn't come into contact with anything since the original hose was shaped a bit different. The original hose on the right showed cracks when I bent it & it was apparently leaking gas into the wiring harness right below it. When I lifted the wiring harness, gas dribbled out at the splice of the covering. Scary to see that, gas in with wiring! Per advice from Jim B at 928 Int., I didn't have to get the factory replacement for that right hose.
Both hoses are the same size, just the pic makes the one on the right look longer. The factory U shaped hose was within an inch of the length of the new one. I was going to make the main U shaped hose the exact same length as the original, but the extra inch seemed to give it more loop to it & the hope is that would lessen any chance of it ever pinching. Seems to be working just fine. My factory U hose looked darn good when I cut it open. As Tony said, it actually has a plastic sheathing.
Both hoses are the same size, just the pic makes the one on the right look longer. The factory U shaped hose was within an inch of the length of the new one. I was going to make the main U shaped hose the exact same length as the original, but the extra inch seemed to give it more loop to it & the hope is that would lessen any chance of it ever pinching. Seems to be working just fine. My factory U hose looked darn good when I cut it open. As Tony said, it actually has a plastic sheathing.
Last edited by MGW-Fla; 12-05-2012 at 09:49 PM.
03-30-2007, 10:46 AM
#33
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Don,
Mine is the same as Mels and the one I took off the 86.5.
The 87 is an early flip up wing so maybe had the older style.
With that extra rigid pipe I would use a longer piece of hose to maintain the 3-3/4" minimium bend rad. There is the room to do that.
Roger
Mine is the same as Mels and the one I took off the 86.5.
The 87 is an early flip up wing so maybe had the older style.
With that extra rigid pipe I would use a longer piece of hose to maintain the 3-3/4" minimium bend rad. There is the room to do that.
Roger
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
03-30-2007, 11:07 AM
#34
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Originally Posted by Carl Fausett
Damn.... why didn't I think of that? Let me work that through... I need to get the right ID hose in bulk, and then the right OD swadged ends, and then the right mandrel for my swaging machine. I think I might have it already...
Good idea!
Good idea!
My best to you, Carl!
Leslie
03-30-2007, 11:32 AM
#35
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Houston we have a problem.
I just looked at the hose on my GTS and the design is totally different and as per the picture in post#6.
Here is the problem - The bend rad of that very small piece of hose is a fraction over 1" and that is not achievable with any readily available hose.
Back to the drawing board on that one. I wonder why the part is NLA? Same reason maybe.
Anybody who bought the kit for an 87 and later car I will contact you separately. A replacement for that hose or money back whatever.
I just looked at the hose on my GTS and the design is totally different and as per the picture in post#6.
Here is the problem - The bend rad of that very small piece of hose is a fraction over 1" and that is not achievable with any readily available hose.
Back to the drawing board on that one. I wonder why the part is NLA? Same reason maybe.
Anybody who bought the kit for an 87 and later car I will contact you separately. A replacement for that hose or money back whatever.
03-30-2007, 11:52 AM
#37
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I thought there was a US law regarding parts availability. Is it only 10 years? I thought it was 15, which would mean the later style (87-95) hose should still be available for the cars manufactured in 95.
The original hose material is quite different from these substitutes, which a semi-rigid inner tube, IIRC, encased in a sheath.
The original hose material is quite different from these substitutes, which a semi-rigid inner tube, IIRC, encased in a sheath.
Last edited by Bill Ball; 03-30-2007 at 12:28 PM.
03-30-2007, 11:59 AM
#38
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Originally Posted by byrdman454
I had the "pinching" problem when I went to get this fuel line replaced. When we tried to re-create the same bend radius (with the same length EFI hose), it pinched. We did look into some spiral bindings that go around the hose to keep its shape. They look like slinkys. I gave up and went with braid. They kept their shape and are protected from damage. I ended up replacing all my rubber fuel in braid.
Harvey
Last edited by H2; 03-30-2007 at 12:24 PM.
03-30-2007, 01:05 PM
#39
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All,
I gave all the braided line info back at the end of January. The thread title is "85-86ers Fuel Line Preventative Maintenance", posts 5 shows pics and post 8 has the company info. (Sorry I do not know how to post thread links so you will have to do a search). Can someone provide a link here for me?
I gave all the braided line info back at the end of January. The thread title is "85-86ers Fuel Line Preventative Maintenance", posts 5 shows pics and post 8 has the company info. (Sorry I do not know how to post thread links so you will have to do a search). Can someone provide a link here for me?
03-30-2007, 01:19 PM
#40
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Originally Posted by byrdman454
All,
Can someone provide a link here for me?
Can someone provide a link here for me?
Glenn
03-30-2007, 01:22 PM
#41
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Originally Posted by byrdman454
Can someone provide a link here for me?
https://rennlist.com/forums/showthre...ve+Maintenance
03-30-2007, 11:28 PM
#42
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Been looking for a hose to meet the requirments of the 87 and newer U shape fuel hose.
So far not good.
Byrdmans hose is metal braided which is great for external protection but does nothing for the ID of the hose. I am not discounting it but until I see the design parameters its only a possibility.
I will keep searching.
Roger
So far not good.
Byrdmans hose is metal braided which is great for external protection but does nothing for the ID of the hose. I am not discounting it but until I see the design parameters its only a possibility.
I will keep searching.
Roger
03-31-2007, 10:24 AM
#44
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H,
You have a point about the front hose - maybe.
OK so the question is why put a U in the rear and not in the front.
If not a vibration, movement or natural frequency reason was it clearance for parts/cables??
We find the answer and we can solve the problem.
Nicole,
Any contacts in 928 engineering land?
Roger
You have a point about the front hose - maybe.
OK so the question is why put a U in the rear and not in the front.
If not a vibration, movement or natural frequency reason was it clearance for parts/cables??
We find the answer and we can solve the problem.
Nicole,
Any contacts in 928 engineering land?
Roger
03-31-2007, 05:23 PM
#45
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Although we question some of the original Porsche engineer's design decisions, I have to believe they had a pretty sound rationale as to why they made the parts as they did. Let's just hope they didn't make decisions based on economy of process. This was a luxury car, after all. Given the careful engineering of the 928, I still suspect that each decision had a sound reason. I wouldn't want to stray too far from that.
That said, I also believe that, over the past 20 years or so, materials available to us today must have improved and we're wise to research the better, modern replacements. Once the smoke settles on this issue, I will send an order out to what I feel is the better solution.
H2
That said, I also believe that, over the past 20 years or so, materials available to us today must have improved and we're wise to research the better, modern replacements. Once the smoke settles on this issue, I will send an order out to what I feel is the better solution.
H2