[urq] UrQ Intercooler Solutions

Claus Vegener vegener at post7.tele.dk
Thu Feb 1 12:29:59 EST 2007

I could send you some pictures from my Urq 83 with a
huge IC placed in front of a new 034EFI radiator.
2 fans are placed behind to draw air through.
No cutting. The original bumper an frontspoiler in place
but for my use I have relocated the generator to the AC bracket and mounted 
a flat-belt.
It is at the same time a 20V conversion with a 3B IM cut to lead the IC-air 
in from drivers side/back.
But no AC (it was gone south anyhow)
----- Original Message ----- 
From: "Ben Swann" <benswann at comcast.net>
To: <cody at 5000tq.com>
Cc: <urq at audifans.com>; <erwendell at mac.com>; <quattro at audifans.com>
Sent: Thursday, February 01, 2007 5:11 PM
Subject: Re: [urq] UrQ Intercooler Solutions

Air-water option is not a consideration.  This is to be a street/Grand 
Quattro with some track time.  Water squirt (outside the intercooler) will
solve heat soak and work fine should I decide to run down a straight ¼ mile
track.  NOS/H2O inj. Is for another discussion, but in consideration.

I am looking for what will fit into the '83 Ur Quattro - apparently this has
not been done much, as I have not seen any solutions yet except for radical
sport quattro setups and some extreme examples where the bumper/core support
has been completely cut out and reconfigured.

The one you show looks nice Cody, and I have some units that are similar in
dimension.  However, unlike the A4 and model 90s, the core support is not
removeable without cutting and there is no room there.

I may need to do some cut and reconfig. But would like this to be minimal. 
almost seems that solution may lend itself to 2 short high-flow units run in
series or parallel and located in appropriate places.  If you are familiar
with this car you know that even the smaller stock unit is really crammed in
there making things difficult to access as it is literally squeezed between
the alternator, oil cooler/filter(s) downpipe and turbo.  You don't even 
room to get your hand between the intake hoses for service and inspection.

I like the idea of extending a unit fore of the wheel - same 
as stock, only the unit is longer.  The 944 inlet/outlet are very simlar as
the stock unit which is about 16" long.  The 944 unit is about 22" overall.
The spoiler is good for use in directing the flow ala ram-air.


[Date: Wed, 31 Jan 2007 23:39:40 -0500

From: "Scott Phillips" <Scottp at ippe.com>

Subject: RE: UrQ Intercooler Solutions

To: <urq at audifans.com>, <quattro at audifans.com>


      <77ADBF17DED38E4F8776C61A86F9E60D6CF4D4 at ippe-exchange.nj.ippe.com>

Content-Type: text/plain;     charset="us-ascii"

Ben.. on the later model cars the intercooler is mounted in front of the 
well with louvers in the plastic inner wheel well for airflow.

I don't know much about the UrQ, or if you have already thought of it but 
about moving the IC away from the "front" of the car. And into a space in
front of the wheel, then make a cold air intake duct to force air to the IC?

Just a thought...

Scott '90 V8Q x2


Date: Thu, 1 Feb 2007 00:22:05 -0500

From: "John Cody Forbes" <cody at 5000tq.com>

Subject: Re: UrQ Intercooler Solutions

To: "E. Roy Wendell IV" <erwendell at mac.com>,    "thejimrose"

      <thejimrose at gmail.com>

Cc: quattro at audifans.com

Message-ID: <000901c745c0$eb393220$6401a8c0 at nuvolari>

Content-Type: text/plain; format=flowed; charset="iso-8859-1";


E. Roy Wendell IV wrote:

> Contrary to popular believe, intercoolers act much more like a heat

> sink than a heat exchanger. They absorb temperature spikes during

> boost and then shed much of the heat back into the intake air when off

> boost.

Exactly true. A larger physical size and thick wall ala 951 intercooler does
the street job great. I also agree that a fan most likely won't help much,
other then to help remove extra heat when sitting at a traffic light and to
prevent heat soak (which isn't a major issue with your setup anyway).

> As far as I'm concerned air-to-water is the solution for street and

> drag intercoolers.

[Another option of course is installing a better intercooler ahead of the
radiator. I'm not too up on who makes what, but I built and installed a 3"

thick, 30" wide, 12" tall intercooler in the front of an A4 before, 
A/C and all.


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