[200q20v] intercooler

Bernie Benz b.m.benz at prodigy.net
Mon Dec 3 21:20:21 EST 2001

Your examples are too simplistic and unrealistic to make a reasonable
comment thereon, so I won't.

> From: "mlp" <mlped at qwest.net>
> Date: Mon, 3 Dec 2001 18:04:32 -0700
> To: "Bernie Benz" <b.m.benz at prodigy.net>
> Cc: "Scott Justusson" <QSHIPQ at aol.com>, "200q20V mailing list"
> <200q20v at audifans.com>, "audi-20v" <audi20v at rennlist.org>
> Subject: RE: [200q20v] intercooler
>> -----Original Message-----
>> From: Bernie Benz [mailto:b.m.benz at prodigy.net]
>> Sent: Monday, December 03, 2001 5:32 PM
>> To: mlp
>> Michael, Thanks for the very interesting info on the UrS4 IC.
> You are most very welcome.  A big thanks for taking a hard look at the
> information vis-à-vis the existing systems
> Big snip
>> Let's speculate on what Audi design has done
> snip
>> Obviously, over this 3 generation evolution, they
>> have been moving in the direction of drasticly
>> increased IC flow capacity and reduced pressure loss
>> across the IC. (Larger and more tubes of shorter length.)
>> This evolution has sacrificed forced induction aftercooling, thus is
> at
>> the expense higher and higher charge temperatures, i.e. smaller and
> smaller
>> temperature drop across the IC.
> Well all I can offer is the thought that just because a tube is
> shorter doesn't necessarily mean it can't be as effective a heat
> transfer sink as a longer tube SO LONG AS, or maybe a better term be
> IF the charge air moving through it has, among other things (i.e. the
> "turbulators" effects & functions) been slowed in its passage.
> i.e. If you have two systems, one a single ten foot tube vs. the
> other, ten one foot tubes, same volume or flow of air, isn't the air
> in the ten one foot tubes going to be moving @ 1/10th the speed of the
> single column of air in the one 10 foot tube?  Therefore, volume for
> volume, the air in both systems will be spending the same total amount
> of "tube time" Yes?  But the initial "highest" heat delta may be
> better distributed over the first 2" or 3" of the 10 short tube
> system, than the equivalent 36" of the single tube system?
>> First, remember that our cars are not designed as race cars
>> or Pikes Peak performers.  IMO, They are designing cars for
>> short burst performance,.... snips
>> A quick pop is all you get!
>> Bernie
> Well Bernie, hopefully that's not going to be the case no more
> (Photo Attached)
Your photo shows an after market IC installed on your S4.  Upon what facts
and specs did you base your decision to spend how many bucks on this thing?

> ;-)
> Michael

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