I am trying to
determine whether I have an air flow problem or not. I'm getting CHTs in
the 365 to 385 range in cruise, oil temps around 205 in my normally aspirated
ES.
11,500 feet
2,450 RPM
25-50 deg ROP mixture +/-
+6F OAT
Do those temperatures match? What I mean is that about what you would
expect for oil temp at that cylinder temp? It seems to me that at
those CHTs I should be down around 185 on the oil temp.
What is the "ideal" CHT temp in cruise?
Do I need CHTs in the 350 range, oil in the 180 range in the winter to have
a good summer airplane?
I have to think my oil cooler is "cooling" because a 10 knot decrease in
airspeed gives me a 10 degree increase in oil temp, so air and oil are flowing
through the cooler.
So what I'm getting at is do I need more air for both the cylinders and
cooler? Or is the air flow fine and the cooler isn't working
correctly?
I think my baffling is pretty good, no leaks, and with only a 20 degree
difference in CHTs between cylinders, I seem to be pretty well setup on the
baffling. Before I start cutting into my cowl, I thought I'd do some more
homework and make sure I need to.
I'm going to download my JPI data today and take a closer look.
Thanks in advance for any insights.
Mike Easley
Colorado Springs