CHT Temp issue - Too Low?

Post by **bullojm1** » Wed Apr 01, 2015 9:33 pm

I recently moved my oil cooler shutter from the rear of my oil cooler to the front (Thanks Bruce and CJ for the detailed pics!). I did a recent flight in and noticed my CHT's were cooler than normal - 250, 248, 259, 264 (OAT was 25 degrees F).

Is this something to be concerned about, or am I worrying about nuttin'?

bruceh · Post by **bruceh** » Wed Apr 01, 2015 11:06 pm

Lycoming documentation says minimum CHT's are 150F.
Was this with the oil cooler open or closed?

I think you are fine with CHT's at 250F. More margin against any detonation!

captain_john · Post by **captain_john** » Thu Apr 02, 2015 8:00 am

Mikey,

Nope... Nothing to worry about. Eci says the cooler, the better!

CJ

Post by **bullojm1** » Thu Apr 02, 2015 2:41 pm

Bruce-

These temps are with the oil cooler shutter closed. For for affirming that these temps are still within a reasonable range. Too often I hear of people running in the mid 300's as their normal CHT's. I suppose I've been lucky to never have high CHT's once I sealed off my baffles and plenum.

captain_john · Post by **captain_john** » Sat Apr 04, 2015 7:48 am

Mikey, what was your power setting with those CHTs?

I see that OAT was 25 degrees f. Chilly!

Those are great numbers!

I am wondering how I will do when I get down to Florida. I Have never had OATs higher than maybe 15 degrees c.

CJ

Post by **bullojm1** » Sat Apr 04, 2015 1:11 pm

CJ-

24 squared (75%) and leaned back to 8 GPH. I'm pretty happy with my numbers! Now all I need to do is get off my lazy arse and fix my heavy wing. I have a feeling it's costing me 10 kts in cruise.

captain_john · Post by **captain_john** » Mon Apr 06, 2015 9:14 pm

really?!? You still haven't fixed that? All you have to do is to squeeze the trailing edge of the light aileron. I did mine a long time ago and it is a pleasure to fly now! Just do it!

CJ