I had a top overhaul with new cylinders.

We ran it in the visinity of the airport at 1,500 ft
at settings between 2500 and 2600 REVs. In the second
hour we climbed up with full power at 100 knots to
8000 ft. Power setting again between 2500 and 26oo
REVS. After the second hour the oil consumption was
already stable ( remember only top overhaul). Oil temp
stayed solid at 183 degrees in level flight and 192
degrees in climb. Measured with JPI 700 . Ships oil
temp stayed one needle width below central white dot
in level flight and went up to the white dot in climb
mode. JPI measured differences no more than 20
degrees CHT , hottest is 350 degrees coolest is 330
degrees. The engi8ne is peaking at 1425 degrees EGT.
Number ONE cylinder is generally peaking first. Number
3 cylinder is the hottest, about 30 degrees hotter
than the coldest cylinder. Also slight engine
vibration in the first few hours disappeared after
about 5 hours flying. Engine clearly has more power
than before the overhaul. Speed at 2400 / 24 at 3k ft
is 125 Knots at around 12 gallons /hr. Leaning to 100
degrees rich of peak based on JPI information. I have
a 3 blade prop.
Regards
HarryR
MC 360 1975


--- Paul Werbin <paulwerbin@yahoo.com> wrote:

> I just got my engine back from Lycoming. They say
> run
> it hard, not above 6000ft to keep 75% power for
> first
> 50 hours or when oil consumption stabilizes
> (whatever
> that means in a Lycoming) It may be more than 10
> hours
> for some engines.
>
>
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