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I have read that the water cooling designed in to some
automobile turbos is not really for cooling the turbo during operation. It
supposedly is to continue to provide some cooling after the engine shuts
down.
This is my understanding
as well, but more specifically, it helps prevent problems caused by the average
driver who has no idea what goes on in the engine compartment. The owners
manual for the FD states that you should let the engine idle for at least
30 seconds prior to shutting it down. Even as minimal as this requirement
is, how many people do you think do it? When I was talking to Turbonetics,
they said that water cooling wasn't needed for aircraft, since they get
a guaranteed cool down period during descent, and taxi back to the
hanger. They also stated that pilots are far more willing to comply with
procedures to keep their engine's happy :-)
I believe Todd has done at least some of these modifications to his turbo
which may account for his lack of turbo problems.
Not to be too critical, but isn't Todd the only one (so
far) to damage his engine due to overboost induced detonation? Maybe it's
just me, but I'd call that a turbo problem :-)
BTW, that was a very good explanation
of a/r.
Cheers,
Rusty
(yawn)
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