"Ron Rosenfeld" wrote in message
news
I, too, have a Lycoming IO360 with standard FI's.

If I lean relatively slowly, I find that my airspeed doesn't drop off
until
I am 25-50° LOP. If I then enrichen a bit, I'm still LOP.

If I lean very, very slowly, I will see the airspeed drop off sooner.

Could it be that your "normal" procedure leads to LOP settings?

Ah, interesting Ron. Since I don't have any EGT sensors and
only one CHT, this may well be the case. By leaning more I
managed to bring the CHT down, I don't know if that means
anything. The "normal" CHT is still down from a full power full
rich climb (I'd expect it would be!).

If I am going somewhere I use more power, maybe 65-75%
but I use a higher fuel flow by flying richer comparatively than
I do when I'm pottering around. The CHT in this case seems to
be exactly the same.

I will have to try leaning to LOP on higher power, but since I don't
have an analyser to see what's going on I'm a bit reluctant. I take the
view that at less than 65% power I can't screw it up whatever I do
with leaning.

Paul