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Vanagon fuel rail fix
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Antron
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PostPosted: Sun Feb 07, 2010 6:40 pm    Post subject: Reply with quote

Am I missing something ? I see 4 ports and a pres guage - where is the inlet for it ?
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snowsyncro
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PostPosted: Sun Feb 07, 2010 8:44 pm    Post subject: Reply with quote

The two outside are the inlet and return, the two inside are to the injectors.

RonC
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RGS Paul
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PostPosted: Mon Feb 08, 2010 6:40 am    Post subject: Reply with quote

Keane,

That is feckin' SWEET! Very nice job, I wish I had the tools and skills to knock something like that together when I got snowed in.

Paul
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Summers420us
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PostPosted: Mon Mar 28, 2011 1:31 pm    Post subject: Reply with quote

Bringing up an old post for discussion.

Why not eliminate the manifold all together and use the FI Bay window metal fuel rails?

Not only would it clean up the engine bay, but perhaps they would be safer.

Do you need the volume of the plastic tank type fuel rails to even out the fuel pressure?
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msinabottle
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PostPosted: Sat Mar 31, 2012 4:04 pm    Post subject: Metal Fuel Rails Reply with quote

Kicking this thread due to the fear I think we all have of vans with good fuel lines notwithstanding... Having a bad thing happen.

Shocked

Right now, Van Cafe is selling a metal fuel rail, ecce:

http://www.van-cafe.com/home/van/page_1524_286/aluminum_fuel_rail.html
Image may have been reduced in size. Click image to view fullscreen.


and one of our own over on the Classifieds is selling his own, less-milled version, that being:

http://www.thesamba.com/vw/classifieds/detail.php?id=1114641
Image may have been reduced in size. Click image to view fullscreen.


And I thought someone else was, I checked the Rocky Mountain Westy and Go Westy sites.

The Harbor Freight jury-rig of the 1 into 4 air compression fitting also looks functional.

Is there a consensus on these, yet? fastwagens is offering a very good price, but his isn't all one piece, not that I'm sure it needs to be, the Van Cafe ones look beautiful, the jury-rig is easily something I could do... And it's all cheap insurance to keep... Something bad... from happening.

What does everybody ELSE think?

Best!
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teej
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PostPosted: Sat Mar 31, 2012 4:22 pm    Post subject: Reply with quote

I did some recent research too. GW also sells the pictured Van-Cafe unit, and based on their experience has this comment:

"Product note: In reality, the original black plastic ones rarely ever fail on their own; rather, the "nipples" succumb to heavy-handed mechanics (no, not you!) in a hurry to remove the old fuel line that stubbornly hangs on."

I think careful monitoring after any fuel delivery related service, and also after any extended period of storage, or first temperatures much different from what the van normally experiences are habits to cultivate.
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90Doka_Guy
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PostPosted: Sat Mar 31, 2012 4:49 pm    Post subject: Reply with quote

The rail that Van Cafe is selling is pretty elegant. Short of making a casting, I'm not sure much more can be done to minimize any potential failure modes of the thing.
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randywebb
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PostPosted: Sat Mar 31, 2012 5:22 pm    Post subject: Reply with quote

you have to wonder why VW went to the trouble of putting those little rubber discs in the ends of the stock ones -- maybe they are supposed to function to reduce pressure fluctuations??

if an Al one works fine under all conditions, that would be an improvement tho, as plastic will not last forever
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SCM
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PostPosted: Sat Mar 31, 2012 6:47 pm    Post subject: Reply with quote

randywebb wrote:
-- maybe they are supposed to function to reduce pressure fluctuations??


Isn't it the fuel pressure regulator's job to keep the correct pressure in the system? I just (literally, 2 hours ago) finished doing my fuel line replacement and added the Van Cafe rails. My van didn't blow up on the drive back to return the fuel pressure gage to the FLAPS so they must work Laughing . I bought them for the bling factor just as much as for the piece of mind.

That said, I liked that I didn't have to be too nervous clamping new hoses to an old brittle piece of plastic. They looked to be really well made (actually seem to be a pretty simple thing to make with the right tool). I wish they came in anodized colors (maroon, yellow, or blue, in that order would have been my preference) with the option for personal engraving but oh well.
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jashv
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PostPosted: Thu Aug 16, 2012 7:43 am    Post subject: Reply with quote

Sorry to bring back the dead - so what's the internal measurement of the stock fuel rail ? Anyone have a shot of one cut open ?
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msinabottle
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PostPosted: Thu Aug 16, 2012 3:48 pm    Post subject: Some Updates Reply with quote

Harbor Freight no longer offers that 4 into one hydraulic fitting--from the comments I found on the original posting, a lot of them were rupturing...

Shocked

Mind you, the pressures would be a lot higher than they are in a fuel system. Both Van Cafe the Samba ad are still up. I'm debating asking the fellow in the Samba ad if he'd make rails to which I could BOLT metal fuel line--Metric bubble flare to coupling. THAT would get rid of the ever--aggravating fuel line clamp dilemma.

Still figuring out how to make this happen for Winston.

Best!
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jashv
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PostPosted: Fri Aug 17, 2012 5:01 am    Post subject: Reply with quote

I like the one Van-Cafe sells, only because you can add in a gauge which would be kinda nice. What I don't like is that price of $48 is EACH, and you need two !! For that price are you getting a free neck and shoulder massage along with chips and drink?

You could go here:
http://www.onlinemetals.com/merchant.cfm?step=2&id=745

Purchase a foot of aluminum hex for $6.00 and if you're REALLY careful I don't see why you couldn't drill and tap and make the manifold similar to the harbor freight idea.

Or buy brass:
http://www.onlinemetals.com/merchant.cfm?step=2&id=81

One foot of that is $18, I wondered if you could braze brass pips onto that?

I understand the costs in machining a part, but why machine this part? We're talking 36psi at the rails, right? You're going to shove a rubber hose on the pip and screw on a .10 cent hose clamp, right? That's why I asked if someone cut one open, are there tiny fairy's in there or a shard of unicorn horn?
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tencentlife
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PostPosted: Fri Aug 17, 2012 10:48 am    Post subject: Reply with quote

Quote:
a .10 cent hose clamp


You must be mistaken, I've never manufactured hose clamps.

The ones I do use cost about a buck apiece. There's 22 of them on an engine job.

I believe the OEM "plastic" (fiber-reinforced nylon, actually, tougher than all get-out despite the widespread paranoia) manifolds (they are decidedly not "fuel rails") were added both to hold a reserve volume near the point of delivery, as Paul said, and to dampen the pressure waves coming backwards off the injectors every time the pintles slam shut (and they do slam!) so the injectors would be unaffected by it being reflected back and affecting the speed of the next opening event. Basically for more consistent high-speed injector operation. But that's just my theory, looking at what would be occurring inside such an large enclosure vs. a simple tube.

I think the VC one-piece alu machining is the only option shown that is viably an improvement, and only due to the toughness of metal vs. the OEM material, a marginal and unnecessary improvement given the nylon's already-high toughness. Each of the other pieces shown increases the potential leak points from 4, to 9 or 10 per side. The VC ones actually increase those points too, but only by 1.

I believe the OP is incorrect in suggesting that "todays fuels", which we have had year-round here for over 15 years already, will cause weakening of the end-cap on the OEM manifolds; take one apart and you will see that the end cap is cemented in and is effectively stronger at the joint than the material itself. Apart from that non-existent prospect, it is inconceivable to me that the OEM ones could fail spontaneously, only very rough handling could cause the nipples to develop a base fracture that could develop into a leak.

The fear of fueling here borders on paranoia; the reality is that almost all vehicle fires are electrical in nature. Everyone warns newbys to "change their fuel hoses", when better advice would be to inspect them and check the tightness of all the clamps, but while they're looking around check out the big fat unfused B+ connection ring terminal on the back of the alternator which is hanging on by a fingernail-clipping of metal on many vans and which when it falls off and grounds out will indeed mean bye-bye vanny.
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jashv
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PostPosted: Fri Aug 17, 2012 11:02 am    Post subject: Reply with quote

tencentlife - why have I never seen your website before? I've seen go-westy's rebuilds, didn't know anyone else was doing it. What about all the electronics, do you have new mass air meters and what nots, or just the engine?
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PostPosted: Fri Aug 17, 2012 11:04 am    Post subject: Reply with quote

tencentlife wrote:


The fear of fueling here borders on paranoia; the reality is that almost all vehicle fires are electrical in nature. Everyone warns newbys to "change their fuel hoses", when better advice would be to inspect them and check the tightness of all the clamps, but while they're looking around check out the big fat unfused B+ connection ring terminal on the back of the alternator which is hanging on by a fingernail-clipping of metal on many vans and which when it falls off and grounds out will indeed mean bye-bye vanny.
OK, OK - OK! - I've replaced my fuel fed flame paranoia with electrical fuled flame paranoia - hope you are happy now! ; )
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jashv
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PostPosted: Fri Aug 17, 2012 11:09 am    Post subject: Reply with quote

oh yeah - when I replaced all my lines I used the ABA SS clamps that were NOT .10 cents a piece. It was most like 99% my fault of tightening one to tight that has probably cracked one of the pips on my "not a fuel rail" fuel rail (how about gas line thingy) Sorry - just making a joke man.
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tencentlife
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PostPosted: Fri Aug 17, 2012 11:34 am    Post subject: Reply with quote

jashv wrote:
tencentlife - why have I never seen your website before?


The site's only been up a few months but I've had the Samba ad for years, with a link in my sig line. So I should ask you (sounding like my Mom here), why haven't you visited?...

Quote:
What about all the electronics, do you have new mass air meters and what nots, or just the engine?


The engines run on your stock engine management.

And let's not hijack the thread.
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Shop for unique and useful Vanagon accessories at the Vanistan shop:
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jashv
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PostPosted: Mon Aug 20, 2012 6:28 am    Post subject: Reply with quote

If I'm not mistaken it's 7mm fuel line that connects between the rails and the injectors, right? That converts to .275 " or a tad over 1/4".

http://www.pneumadyne.com/input-ports-aluminum-manifolds-p-2579-l-en.html?language=en

Couldn't you buy two of these at say the 3/8 " NPT size ? That's .374 " if my math isn't to rusty. It's tapped in the end, you could plug in your gauge there if you wanted. I agree with whomever brought it up earlier in the thread, each connection represents a point of failure (I.E. a leak) but it may be an acceptable risk if you take care assembling the unit. If you look at the spec on this one it's 3000 psi hydraulic, temp range -10 to 200. And if you wanted to spend a little more you could go stainless.

I'm no expert, just a techy thinking things out, so thoughts?
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debbiej
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PostPosted: Mon Aug 20, 2012 8:13 am    Post subject: Reply with quote

I've been following this thread because I've noticed so many leaks around the nipples of the manifold. (now I know what it's called). I was going to order the aluminum ones, but my husband looked last weekend and determined they were not cracked or leaking, but that I had shoved the fuel line too far up, and the little flanges were interfering with a good seal. probably everyone else knows this, but thought I'd just say anyway.
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morymob
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PostPosted: Tue Aug 21, 2012 4:33 am    Post subject: Reply with quote

I had a orig one crack at inj connector 75 mi from home and dripping on exh when i stopped, lucky. Local friend brought one off air cooled and i fitted it, need longer hoses to injrctors, replaced other one when i got home, no more old orig for me.
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