Cylinder Head Temperatures in Eagles, O2 and O3

[docket]

As we are starting to heat up down here in Southeast Texas I was curious what the rest of you are seeing right now on CHT at 50 ROP/50 LOP at about 22.5 MAP, 2550 PROP and 8000 - 9000 feet?  I am looking at 365 - 375 ROP and 335 - 345 LOP.  I was also curious at what CHT ya'll are typically flying around.  I am just curious if I am pushing mine harder than the rest.  I spent the last two hours today at 370 CHT which seemed a little high for my taste but I was in a hurry.  Thanks.

[roundout]

Doesn't sound abnormal. I can't remember ever seeing an Ovation or an Eagle cruise above 380F CHT ROP or about 195 oil temp even on the hottest of days. 

[Greg_D]

Part of the problem may be running 50 ROP when you are on the rich side of the curve.  50 ROP is almost exactly the worst place to run the engine if you're looking for longevity and heat control.  150-175 ROP would be a much better place to run the engine if you are in a hurry and need to run on the rich side of peak.

[roundout]

Quote: Greg_D

Part of the problem may be running 50 ROP when you are on the rich side of the curve.  50 ROP is almost exactly the worst place to run the engine if you're looking for longevity and heat control.  150-175 ROP would be a much better place to run the engine if you are in a hurry and need to run on the rich side of peak.

[donshapansky]

In the Pilot's Seminar at GAMI the caveat on ROP goes away at altitudes of 8,000' and above you can run the mixture any where you like. The cylinder head temp limit of 385 F remains. That's where you have a choice open cowl flaps or richen the mixture to stay under the imit.

 I do it on my Rocket if I'm in a hurry to make my meeting either or both, first I stay 125 + ROP then open the electric cowl flaps as needed to stay under 385F. I have flown almost 600 hrs in 23 months, with ECI cerminil cylinders all in the high 70's/80, oil consumption is 1-2 qts in 30 hrs.

[Parker_Woodruff]

Quote: donshapansky

In the Pilot's Seminar at GAMI the caveat on ROP goes away at altitudes of 8,000' and above you can run the mixture any where you like. The cylinder head temp limit of 385 F remains. That's where you have a choice open cowl flaps or richen the mixture to stay under the imit.

 I do it on my Rocket if I'm in a hurry to make my meeting either or both, first I stay 125 + ROP then open the electric cowl flaps as needed to stay under 385F. I have flown almost 600 hrs in 23 months, with ECI cerminil cylinders all in the high 70's/80, oil consumption is 1-2 qts in 30 hrs.

[docket]

Quote: donshapansky

In the Pilot's Seminar at GAMI the caveat on ROP goes away at altitudes of 8,000' and above you can run the mixture any where you like. The cylinder head temp limit of 385 F remains. That's where you have a choice open cowl flaps or richen the mixture to stay under the imit.

 

[donshapansky]

I hear you, I see 400 F sometimes leaving Midland, TX in the 100 F + afternoons, I feel for you being held in KDAL my base in Bourland Field doesn't get those holds, if below VFR never more than 5 minutes and I talk directly to TRACON.

I sold by 89 Bellanca SV with an IO-520k that had Millennium II's with 900 hrs. the new owner took it to TBO + 1850hrs, they majored his engine, OH'd the MII's and he has 250 hrs on it, Power Master did the major it runs cooler than ever and stronger than my rebuild, Power Master has some cylinders with over 4000 hrs TT.