[urq] UrQ Fuel delivery fix challenge

[Ben Swann]

Scott,
 
Yes agreed - I should have worded what I wrote differently.  
 
In fact, this setup probably would not fix the actual problem and only aggravate it.
The main thing of merit in the setup is the catch tank/canister and that would need to
be located under the car  unless changing the tank too.You would need a low pressure
pre-pump to keep the canister primed otherwise.
 
As a fuel delivery setup, it would be "nice"  and I like the idea of switching pumps.
The dual/parallel pumps both running at the same time would not add any benefit under
certain power levels - I don't know what that would be, but if one pump is good for 450
HP for example, two would not do any good for power levels under 450 HP.
 
There is probably a better way to explaing this, but moreover, I agree with what you
say.
 
I think this setup would be a good DIY project and I may implement something similar on
my ES2, using switchable pump setup.
 
Ben

  _____  

From: qshipq at aol.com [mailto:qshipq at aol.com] 
Sent: Friday, April 09, 2010 1:03 PM
To: benswann at verizon.net; jackw at lithtex.com
Cc: urq at audifans.com
Subject: Re: [urq] UrQ Fuel delivery fix challenge


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]