Cooling - High CHTs on ground

[blaplante]

1.I think the EMS channel for cylinder 2 is broken. All the other cylinders are in perfect alignment. Apparently there is a failure method where the entire cylinder channel reads low.
2.11.4 is low at that RPM range? I have a cruise prop and at climbout my RPMs are probably lower than you're used to seeing.
3. Yes I ran a few different scenarios in the climb. I did lean a few minutes into takeoff once CHTs started coming down.

What sort of temperature rise do you see on takeoff? Keep in mind I started my takeoff run at 380 degrees CHT.

Swap #2 with #4 probe and prove it.
I'm running fixed pitch and don't have real high climb rpm (also I'm a 160HP engine)
https://www.lycoming.com/sites/defa...0%26%20TIO-360%20Oper%20Manual%2060297-12.pdf page 3-17, 2400 rpm full throttle should be running 15.2 GPH. [2400 rpm gives 0.57 lb per bhp, per hour. At 2400 chart says 160 hp developed. ( 0.57 * 160 ) / 6 to get GPH