[Es2] IC vs. AR?

David Kase davekase at pdqlocks.com
Wed Jun 7 16:04:52 EDT 2006

I agree Bernie.

The aux rad does get good flow just behind the grill, no?

I am using a stock S2 IC behind a stock S2 bumper.  Good flow and clean 

Thanks for the comments,

Bernie Benz wrote:

>Hi Rich, Dave. 
>I¹ve been lurking on this Es2 list to keep track of what you guys are up to,
>but I¹ll add my .02 to this one.
>The total delta heat content of a 20 degree change in charge air temperature
>is a trivial heat input change relative to the heat generated from the
>combustion of the fuel added to that charge, so this is not the reason to
>strive for coolest possible charge, F.I. or NA. Maximizing the useful
>working temperature range to the charge detonation point is all important,
>and charge temperature is one factor, as also are head and piston surface
>So, if you¹re pushing the engine, don¹t sacrifice radiator capacity! The
>aux. rad. location doesn¹t see much air velocity, but it¹s better than
>eliminating it, and that¹s no place for an effective IC anyway.
>IMO, the most effective place for a larger capacity IC (along with the oil
>cooler) is behind the full width grill in the lower part of the bumper
>(dumping the fogs). This requires a long, narrow IC, which can be cheaply
>fabbed by welding two 5K IC cores together in single pass series charge air
>flow. The resulting IC has the cross section of the 3B IC but is 28² in core
>Have fun!
>>From: es2-request at audifans.com
>>Reply-To: es2 at audifans.com
>>Date: Wed, 07 Jun 2006 10:47:48 -0400
>>To: es2 at audifans.com
>>Subject: Es2 Digest, Vol 32, Issue 1
>>Message: 8
>>Date: Wed, 7 Jun 2006 16:01:56 +0200
>>From: "Richard Tanimura" <richard.tanimura at gmail.com>
>>Subject: Re: [Es2] things that tend to break on es2's at the track
>>To: "David Kase" <davekase at pdqlocks.com>
>>Cc: es2 at audifans.com
>>That's interesting Dave. I have an S2 where I removed the aux cooler and I
>>would agree with you. I think it made a small difference and I am running
>>slightly hotter than before. In retrospect, I think Audi put in the aux rad
>>for a reason.
>>I have heard it argued that a larger IC, by lowering the charge temp, will
>>lower engine temps. The lower intake temps propogate through the engine.
>>Makes sense to me.
>>I have not done it yet, but my idea was to remove the aux rad to make room
>>for a larger IC. I figured the effect of the larger IC would cancel the
>>effect of the aux rad removal. So far I have only gotten half way.
>Es2 mailing list
>Es2 at audifans.com

David B. Kase
Engineering Manager
PDQ Industries, Inc.
2754 Creek Hill Road
PO Box 507
Leola, PA 17540

717-656-4281 (p)
717-656-8749 (f)

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