Turbo idle-down

[Brett Dikeman]

At 6:22 PM -0700 1/14/04, Al Powell wrote:

>1) Idling the turbo down for a few seconds assures that it's no longer
>spinning at high revs when you kill the engine, just in case you did goose
>the engine when pulling into your home. This is A Good Thing in itself, and
>makes idling the car for a few seconds worthwhile.

It's also nonsense, as your turbo slows down nearly instantly...they 
don't have that much momentum(that's done on purpose, remember?)

>2) If there is no other benefit, at least idling the car lets the hot turbo
>housing have a few more seconds to dissipate a bit more of its heat into the
>heat sink of the manifold.

Lot of people I know do this at the track events in the summer, but 
the difference is that the hood is open, and it's mostly to cool down 
oil temps, which really get up...but it also cools down some engine 
internals a little.  There's certainly a point of diminishing 
returns- a few minutes are all that's needed, and if you leave the 
hood open, convection takes care of the rest after you shut down.

B
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