23 How do I keep my engine cool?
Description
This article is from the VW Performance FAQ, by with numerous contributions by Jan Vandenbrande others.
23 How do I keep my engine cool?
A:Keeping your engine sufficiently cool is needed for all
the obvious reasons. VW engines like to run hot, and are
more efficient that way. However, under high stress or
race conditions, the factory system may not be
sufficient. If you run too hot your power is reduced due
to engine knock.
There are several ways to aleviate this problem: 1)
Increase heat transfer with a different cooling fluid or
wetting agent. 2) Increase the cooling capicity of your
car with a larger radiator.
The reason why I do not mention changing the thermostat
to a lower temp one is because it merely reduces the
average operating temp (which may be too high), but does
not change cooling capacity. In extreme conditions the
temp rating on the thermostat is not going to matter
because they will all be fully open. It is however a good
idea to make sure that your thermostat still is capable
of opening fully at the intended temp.
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