I have an IO-390 and I have noticed that when I'm cruising at 2500rpm at 2,000', 3,000', 4000', or 5000' my hottest CHT is never above 375 no matter where the mixture control is. Does this effective mean that the red box does not exist for this engine/cooling setup?
I've read in a few Busch articles that a good practice is the keep the CHTs on Lycomings above 350 yet below 400 to ensure that lead doesn't deposit on the exhaust valves and cause build-up.
Can anyone provide more clarity?
TIA.
I've read in a few Busch articles that a good practice is the keep the CHTs on Lycomings above 350 yet below 400 to ensure that lead doesn't deposit on the exhaust valves and cause build-up.
Can anyone provide more clarity?
TIA.