[Healeys] Fw: thermostat discussion - Part 2

[Dallas Congleton]

Alan , with all that fan power will the air flow be too fast for heat 
exchange ?

 :^)
Dallas


----- Original Message ----- 
From: "Alan Seigrist" <healey.nut at gmail.com>
To: "Eric (Rick) Wilkins" <e-wilkins at cox.net>
Cc: "AustinHealey List" <healeys at autox.team.net>
Sent: Thursday, July 16, 2009 9:50 PM
Subject: Re: [Healeys] Fw: thermostat discussion - Part 2


>I run three classics in the very hot tropical heat of Hong Kong, and my
> experience is as follows:
>
> 1) High coolant flow is important, but will not make a difference if the
> rest of your system is stock and definitely if it is compromised through
> scale or rust.
> 2) The best solution is to increase radiator capacity, which will then 
> slow
> down the increased coolant flow.  The result will be a much cooler running
> car.
> 3) Your standard narrow throat thermostat is not up to the job for a hot
> climate like Hong Kong.  I've used them and my cars always overheat when I
> do.
> 4) Using a higher percentage of water to coolant makes a big difference
> 5) I have discovered that probably the most important thing is getting 
> alot
> of air flow over the radiator.  Not all radiator fans are the same, and 
> with
> time I have learned that high performance radiator fans can make a huge
> difference.  I have a SPAL high performance fan on both the A90 and the Mk
> IX, both cars run in 95 deg, 100% humidity bumper to bumper traffic like 
> it
> was a cold winter's day.
> 6) getting under bonnet temps down makes a huge difference too.  Jet Hot
> coatings on headers and downpipes seem to make the most difference, I have
> found!
>
> Alan
>
> '52 A90
> '53 BN1
> '64 BJ8