[urq] UrQ Fuel delivery fix challenge

[qshipq at aol.com]

 I don't agree it overkill, it's redundant, and looks almost exactly like the Audisport setups, including the S2 Rally car I used to service.  Audisport puts a switch in the dash that assigns the fuel pump 1 or 2.  If one fails, the other is there to continue on.  This appears to be confirmed by the fact that the feed line to the pump is not 'larger' as would be expected for a 'dual pump' feed.  In fact, I would argue that with both pumps on potential cavitation would be increased with this setup.  


 In the end, I suspect that the best fitment would be in-tank fuel pump/s, as external canisters are fine for a personal car, but massively increases any fabricators liability to the 'fix'.

Scott J

-----Original Message-----
From: Ben Swann <benswann at verizon.net>
To: jackw at lithtex.com
Cc: urq at audifans.com
Sent: Fri, Apr 9, 2010 10:13 am
Subject: Re: [urq] UrQ Fuel delivery fix challenge


Nice - massive overkill.  Would definitely prevent cavitation and certainly 
deliver
enough fuel.  It does kind of fall out of the desired  price range and fitment 
criteria.

Keep in mind two things:

1. problem is really the bottleneck of the small tube coming out of the fuel 
tank.  This
is where the fuel capacitor works despite simplicity.  It sits directly under 
the fuel
outlet and acts as a "buffer" or "capacitor" holding enough extra fuel so there 
is no
problem with cavitation.  Also the return line is teed in keeping pressure 
balanced.

2.  Where ya gonna fit this contraption.  I mean that nicely as it is a good 
piece of
work.  I wanted to keep my car as close to looking stock, retaining full trunk 
capacity
and nothing out of the ordinary showing.  This setup would be great for racing 
and for
someone who just wants to add a fuel cell and mount in a low spot in the trunk 
and
doesn't care about where to put the luggage.

The best solution - even better than my "fuel capacitor"  would be an in tank 
pump.
Some day I may remove the tank and weld in a new bottom - carefully pumping 
nitrogen or
other inert gas into a tank that has been washed of fuel.

Ben

[Date: Thu, 8 Apr 2010 13:50:15 -0700
From: "Jack Walker" <jackw at lithtex.com>
Subject: Re: [urq] UrQ Fuel delivery fix challenge
To: <urq at audifans.com>
Message-ID: <BB4E958C280340869449F9A2E76BFD5A at NOTEBOOK>
Content-Type: text/plain;   charset="us-ascii"

I was just on the S2 Forum
http://www.s2forum.com/forum/showthread.php?t=38782

There's a guy in I think Finland that's making these;
http://promo.pp.fi/temp/pumppu%20inst..JPG
Sort of sounds like the dual pump and container.
Looks like it could fit into a UrQ spare tire well, or anywhere else someone 
would like
to put it...he wants $1400 for one all plug and play!
Sort of expensive, but I'm going to guess this is pretty much what everyone is 
talking
about??

Jack]