[s-cars] Air to Liquid Intercoolers - Comments??

Mon Sep 15 20:47:26 EDT 2003

Hi,

Since we are talking about Drag race cars (I am talking about the
monsters with V8 mit compressors which compete in NHRA)), is it correct
that they do not have radiators because the time the motor is running is
so short that cooling the engine is not necessary.

Seems strange to me but after all we are talking about dragsters here !
!

Regards,
Frederic

-----Original Message-----
From: Lewis, Gary M [mailto:gary.m.lewis2 at boeing.com]
Sent: Monday, September 15, 2003 7:47 PM
To: Kenneth Hayes; s-car-list at audifans.com
Subject: RE: [s-cars] Air to Liquid Intercoolers - Comments??

I know they are the hot ticket on air to liquid drag cars.  But the
radiator sits in a bucket of ice.

Also noticed that the Mercedes AMG XX55 500hp supercharged monster
family is air to liquid intercooled.

-----Original Message-----
From: Kenneth Hayes [mailto:abiglizard at worldnet.att.net]
Sent: Saturday, September 13, 2003 8:09 AM
To: Lewis, Gary M; s-car-list at audifans.com
Subject: RE: [s-cars] Air to Liquid Intercoolers - Comments??

my random thoughts

you could build a secondary system that was a liquid loop that went
through a newly designed intercooler that utilized the liquid as a
coolant for the turbo air, but you'd have to cool that secondary system
with another heat exchanger that was air to liquid.  liquid is much more
difficult to cool even though water is a great moderator which means I
agree with your supposition on size.  It'd have to be much bigger to do
an equivalent amount of cooling, but the consistency would be there.

so if we jumped to purpose built race cars why aren't they doing
something like this?  not much gain for the effort maybe.  But how about
an electric a/c pump & system (closed loop) that keeps the setup air to
air and utilized an a/c type system to standardize the temp of the heat
exchange?  this could be used down stream of the normal intercooler to
allow the normal crossflow of air to cool the turbo air then further
cool it by the second heat exchanger.  Not only bringing the temp down,
but also standardizing the temp.  So why aren't they doing this in
purpose built race cars?

Ken

-----Original Message-----
From: s-car-list-admin at audifans.com
[mailto:s-car-list-admin at audifans.com]On
Behalf Of Lewis, Gary M
Sent: Friday, September 12, 2003 12:19 PM
To: s-car-list at audifans.com
Subject: [s-cars] Air to Liquid Intercoolers - Comments??

No one seems to talk about them on-list.  Seems like a great way to dial
in boost/timing maps when intake temps are nearly certain, or at least
in a tight range.

My suppostitions...

Downsides:
Weight  - gotta add water and pipes
Space/Package  - gotta be bigger than a air to air intercooler
Throughput  - I'd think with the bigger packaging, you are sacrificing
some IC size, and size equals density

Upsides
Packaging  - "But you just said..."  Yeah, but these keep the air cooler
than the same size air to air.  If you can put in the same size core,
you should have more density. Air Temp Certainty  - Should make software
programming easier

And of course, the twist.  Use an air to air intercoler, then water
inject. I believe this is the best solution.  I nearly did this on the
200 TQA, but I found (and bought) the S6 TQA

Comments welcome...

Gary Lewis

1995.5 S6 Avant, Green/Ecru, RS2 MAF, RS2 Exhaust Manifold, RS2
Injectors, Custom Turbo (K26 Turbine, Factory K26 Cold side (Audi Works
'999' P/N) with 50mm intake and custom Innovative Turbo compressor
wheel), Bilsteins, Eibachs, Big Reds.

1990 200TQW, K24 Turbo, 1991 TQ Intercooler, 1.8 bar, Bypass Valve,
Euro's, Bilsteins, Redline in tranny and diffs, FOR SALE

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