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Mike is correct. Also note, the TSIO-550 has a 12 quart sump.
Ed Rosiak
-------------- Original message ----------------------
From: MikeEasley@aol.com
> The IO-550N has a different oil cooler than the TSIO. The TSIO tends to run
> cool, and the IO-550N runs hot. It doesn't seem to have as efficient oil
> flow through the cooler as the oil cooler on the TSIO. Some do better than
> others. Interestingly, the IO-550G (original equipment on the ES) used the
> same
> cooler as the TSIO.
>
> Mike Easley
> ~205 in the climb, ~198 in cruise, IO-550N
>
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The IO-550N has a different oil cooler than the TSIO. The TSIO tends
to run cool, and the IO-550N runs hot. It doesn't seem to have
as efficient oil flow through the cooler as the oil cooler on the
TSIO. Some do better than others. Interestingly, the IO-550G
(original equipment on the ES) used the same cooler as the TSIO.
Mike Easley
~205 in the climb, ~198 in cruise, IO-550N
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