[Diy_efi] Re: VW Surge / Expansion Tank Line Routing

[Karl Walter]

I have used a setup that works well on tanks with no slosh baffels inside.
 I use a low pressure pickup pump, universal Facet style, diaphram type,
taht feeds a 1 liter container, about 4" daimeter, and 6" tall, then the
hi press pump draws from the bottom of that.  I have it on a suburban that
was origionallt carbed, and it works well even off road 4x4ing.

--Karl



> Hi,
> on audi and vw early injection systems (k-jet and it's successors) there
> used to be:
> - a pump
> - a filter
> - a pressure reservoir
> these somewhere under the rear seats, outside the car. later the pump
> got into the tank.
>
> sometimes the filter is housed in the reservoir, making one unit
> but
> that pressure reservoir is pretty much _useless_
> I wouldn't bother installing it
> it often gets removed anyway, when messing around with them
> give me the part number as long as it's a VW part number, preferrably
> also the model/make/year combination and I can look it up
> latter is enough and preferred, btw...
> but, again, if you have the pump and filter in place, don't bother
> adding that reservoir IMHO, won't help anything
> even Audi was confused about installing it or not, some models with same
> injection sys have it, some not...
> if you have lack of fuel pressure, go for a bigger pump =]
>
> tom
>
> ps. a bigger pic is appreciated if no P/N or make/model
>
>>Message: 3
>>Date: Tue, 19 Oct 2004 18:05:12 -0500
>>From: <clair.davis at charter.net>
>>Subject: [Diy_efi] VW Surge / Expansion Tank Line Routing
>>To: "diy_efi" <diy_efi at diy-efi.org>
>>Message-ID: <001f01c4b630$172c9660$b064a942 at davis>
>>Content-Type: text/plain;	charset="Windows-1252"
>>
>>I just got my hands on one of the little VW fuel accumulator or surge
>> tank
>>things found in late-80's to early-90's Rabbits, Sciroccos, Foxes, etc.
>>Here's an image:
>>
>>http://69.0.158.19/live/thumb/E100020955OES.JPG
>>
>>After a little research, it appears that this is actually the fuel
>> filter,
>>which agrees with a previous thread on this topic.  It APPEARS that the
>>"filter" is your typical fine nylon mesh that basically separates the
>> tank
>>in to two separate areas.  My guess is that one area is fed by a supply
>> pump
>>(low pressure) and also by the bypass/return from the pressure regulator.
>>There is also what I assume to be a tank return line on top of the filter
>>body connected to this area.  The other area has what I assume to be an
>>outlet, which is larger than the other 3 inlet/return lines.
>>
>>My question: is this in fact how this thing is hooked up?  Does anyone
>> have
>>a fuel line routing diagram for this little jewel?  Although it's pretty
>>small, I think this will probably satisfy my needs for a surge tank while
>>autoXing my Valiant.  If not, at least all my lines will be run and I can
>>just reconfigure to add volume.  The extra filter feature is just gravy,
>>since I'll have 2 in the system already.  Thoughts?
>>
>>Clair Davis
>>69 Plymouth Valiant 7730
>>Fort Worth, TX
>>
>>
>
>
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