On Friday, March 17, 2006, at 03:16 PM, Flowbench@aol.com wrote:
> In a message dated 3/17/2006 12:01:03 PM Pacific Standard Time,
> Bobbyhotrods@comcast.net writes:
>
>> The issue of ceasing to oil a hot turbo is before me. I understand
>> most
>> guys let the engine idle until things cool down, but this might not
>> always be
>> possible. Frying my T4 2000 miles from home would make me sad.
>> I can imagine a couple of different supplimentary oil supply deals.
>> Does
>> anyone have any experiance with this and perhaps know an elegantly
>> simple
>> solution? Has anyone seen this problem actually occur, or am I
>> thinking too much?
>> Thanks, BJ in Beantown
>>
>
> Bobby, It is indeed "best" to let everything cool down after applying
> full
> load to a turbocharger before shut down, but that does not mean you
> will kill it
> if you don't. The best we can do is a few seconds (5 to 20 depending)
> of near
> idle before shut down. What happens is as you shut off the oil supply
> and the
> unit is hot it will "coke" or bake the oil in the housing, over time
> it will
> accumulate and fail the turbo. If you must shut down right after a
> pass when
> you are clear of the course and stopped restart the engine and let it
> ran a
> minute or so to remove any residue.
> Bottom line...don't worry just be aware.
> Good Luck!
> Mike
Oh, you meant the turbo on your race vehicle. In that case, never mind
what I said, okay?
Jon Wennerberg
Seldom Seen Slim Land Speed Racing
Marquette, Michigan
(that's 'way up north)
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