[urq] 944 intercooler install

[Ingo D. Rautenberg]

Rich,

You're running into more than just IC heat soak in this instance and will
need to overcompensate IMO with a misting setup over your IC (in case you
don't already do so).  Even your turbo/IC combo needs a little time to
"recover" to perform again ;-)  This is because you're getting actual turbo
heatsoak.  This can only be countered by using a more efficient turbo that
is less prone to heatsoaking (don't ask me which one -- I don't know -- but
I'm sure there are others who would know -- maybe check on the Ur-S car list
and their Happersizing options ;-)

Just my $0.02

-Ingo
'91 200q20v...Slightly modified
'84 Tornado Red Urquattro mit K24
'91 v8 quattro 5-Speed (not exactly stock) :-)
http://hometown.aol.com/quattringo/index.html

----- Original Message ----- 
From: "Rich Letsinger" <ricoletsinger at yahoo.com>
To: "Bill Bennett" <ur.quattro at verizon.net>; <urq at audifans.com>
Sent: Friday, August 13, 2004 3:12 PM
Subject: Re: [urq] 944 intercooler install


> Bill,
>
> I've been reading your posts on fans with curiosity.
> I have a very different test case for my intercooler
> than you do.  My test is 10 laps at PIR, not a trip to
> the 7-eleven.  In laps on the track, I'm on boost for
> 30 seconds, off for 5, on for 10 more, off for 2, on
> for 5 off for 2, on for 20, off for 5 and then the
> whole cycle repeats.  During this, the car has an
> average speed of 50 or 60 mph I'd guess, in 3rd to 5th
> gear over 3500 RPM.
>
> I am completely uncerned with how hot the car is after
> it sits not running for 10 minutes.  I'm concerned
> about how well the intercooler itself keeps cool under
> boost at speed.  And with how quickly it cools down
> off boost but still at speed.  The stock intercooler
> is terrible.  And even the Dialynx and 2Bennett
> intercoolers havn't been good enough.  Granted, I'm a
> 20v running 21 PSI of boost, so it's not surprising
> they're not enough.
>
> What I'm wondering is if my problem is insufficient
> airflow over the intercooler even at speed.  If this
> is the case, a fan might help.  But some kickass
> ducting at the front of the car would probably help
> even more and wouldn't draw any current.  My radiator
> is totally fine.  The fan never runs on track and the
> water temps are way low.  The gauge stays down in the
> termostat opening range, never anywhere near the fan
> operating range until I pull off track and idle down.
>
> Anyway, if you're concerned about heat soak after
> shutdown, fans are an interesting answer.  But that's
> not what I'm working on.
>
> Cheers,
> Rich
>



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