Date:         Sat, 2 Jan 2010 09:26:13 -0800
Reply-To:     David Marshall <mailinglist@FASTFORWARD.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Marshall <mailinglist@FASTFORWARD.CA>
Subject:      Re: Dual Fuel Tank plumbing
Comments: To: Sudhir Desai <sudhir.desai@GMAIL.COM>
In-Reply-To:  <5c80974c1001020615u56088639s10d825c1ab1c8ab7@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Complex things fail in complex ways... keep it simple!

Why why
why does everyone insist on complicated pumps and electronics to manage
two fuel tanks?  The solution costs about $60 - all you need is a
dual tank fuel valve like this one:
http://www.carparts.com/autoparts/ItemBrowse/c-10618/s-10401/p-100000219616/mediaCode-CP/appId-100000219616/Pr-p_CATENTRY_ID:100000219616

If you really want to be clever, you can put a 2nd fuel level
sender in the aux tank so you know when it is empty.

David
Marshall
VW Adventure Driver and BMW Adventure Rider
 
HasenWerk 
http://www.hasenwerk.ca

On Sat, January 2,
2010 06:15, Sudhir Desai wrote:
> To make it a bit more automated,
but just as simple, the transfer pump
> could kick in when the
resistance on the fuel guage (assuming you have
> a working
guage), goes up/down to the quarter-tank resistance, and
> back
off when it goes to the three-quarter-tank resistance.
> 
> Sudhir
> 
> On Fri, Jan 1, 2010 at 22:13, Al Knoll
<anasasi@gmail.com> wrote:
>> The Feynman solution to the
pickup and such on the aux fuel tank is to
>> simply use the
tank as a transfer tank.  A simple pump is used to
>> transfer
>> the contents to the main tank when it is
empty enough.  Can be done
>> underway.
 No dual fuel pumps, no high pressure lines, just a
transfer
>> pump
>> and switch and of course a
working fuel guage on the main tank.
>>
>>
"Things should be a simple as practicable, but no simpler"
>>
>> Al (AH-1 gunner)
>>
>> On
Thu, Dec 31, 2009 at 9:31 PM, TJ Hemrick <x53gunner@gmail.com>
wrote:
>>
>>>  David,
>>>
>>>  You just couldn't do it.
 You just couldn't stay away.  A few years
>>> ago
>>> when we exchanged emails and over the
past several years of reading
>>> between
>>>
the lines of posts here on the list, I sensed some dissatisfaction and
>>> occasional disgust with some unruly customers.
 I completely
>>> understood
>>>
your
>>> sentiments.  I hope things go much
better now.  Although, I must say,
>>> they're
still out their so don't let them ruffle your feathers.
>>>
 Damn glad you're back.
>>>  Now,
about the plans for those aux fuel tanks and how to rig the
>>> pickups....   ;)
>>>
>>> Great way to start the new year,
>>>
>>> Ciao'
>>>
>>> TJ Hemrick
>>> 87 Syncro
>>> Melbourne Florida