[erich weaver]

No flying yet, but I have run my engine several times now for several minutes each, all with the cowl off and sitting still. I am seeing consistently low CHT on #2 cylinder. During my last run, my CHTs early in the run were (1-4) 212, 173, 235, 240. A couple minutes later they were 233, 195, 264, 278.

The variation in #2 concerns me. I havent swapped probes yet, but they all read very consistently at ambient temperature.

Any thoughts?

erich

 

[Bob Axsom]

Put the cowl on and check it

I wouldn't sweat it. My #1 cylinder is low on the order of what you are seeing on #2 relative to the rest of them. Once you get the cooling system closed up in its operating configuration you can get more information about the CHTs and they probably will be different. Then you can look at baffle modifications like a partial plate in front of #2 if it is still low and #4 is still high. I have about 400 hours on my O-360-AIA with LASAR ignition with #1 CHT lower than the rest with no problem what so ever.

Bob Axsom