irishpilot Posted July 14, 2019 Report Share Posted July 14, 2019 Fellow Bravo Afficionados, I am still fairly new to my Bravo and I'm trying to figure out how to get my cruise power setting dialed in. Today I flew three legs in South Texas for a total of 3.0 and the screenshot shows that the CHTs were a little warm, especially the #2 cylinder. I was at 8,500, IOAT of 21C, with half cowl flaps. I ended up running richer to get the CHTs under 400. BTW, the book just says to stay under 500. I assume industry standard is 400 for longevity. From what I've read, I should be able to run 50 ROP with cowl flaps closed and stay below 400CHT. Also of concern is my oil px is 56-57 psi with 8 qts. During the pre-buy, I found that the EDM is new and the mechanic set the initial values and just did a little tweaking prior to the sale. What's going on an where do I start? Thanks! Fly Safe, Safety Forum Mod Quote Link to comment Share on other sites More sharing options...
Davidv Posted July 14, 2019 Report Share Posted July 14, 2019 Everything looks a little hot to me given the FF. How’s your baffling/seals? My oil temps are usually below 190 and PSI a little higher with similar temps here in south Florida. Especially with cowl flaps half open you should be seeing some lower CHTs. While there are some different views on CHTs (with some people saying they shouldn’t go higher than 375 at cruise), you certainly want to keep them below 400. Quote Link to comment Share on other sites More sharing options...
Steve Skinner Posted July 14, 2019 Report Share Posted July 14, 2019 Hi I’m a Bravo owner with 1400 hrs Bravo experience. To my mind at those numbers and low altitude you should be quite a bit cooler egt’s - 360-370. So either timing is out or cooling shroud needs some work. I would be happier increasing to 100 rop and increasing Tit to 1600 to get the same fuel flow. 0-50 Rop is known as the red box and allegedly bad for your engine although that said less than 75% power any setting should be ok. if you were trying to run these numbers with your engine at 18000’ your oil temp and cht would be off the chart as there is less cooling there. Your oil temp should never be that high st such a low altitude- I would suggest get a good A&P to re cowl your engine and check the timing 1 Quote Link to comment Share on other sites More sharing options...
irishpilot Posted July 14, 2019 Author Report Share Posted July 14, 2019 Everything looks a little hot to me given the FF. How’s your baffling/seals? My oil temps are usually below 190 and PSI a little higher with similar temps here in south Florida. Especially with cowl flaps half open you should be seeing some lower CHTs. While there are some different views on CHTs (with some people saying they shouldn’t go higher than 375 at cruise), you certainly want to keep them below 400. I agree it's running a bit hot. I'll check the baffling and seals tomorrow since it's due for an oil change.Fly Safe,Safety Forum Mod Quote Link to comment Share on other sites More sharing options...
MIm20c Posted July 14, 2019 Report Share Posted July 14, 2019 (edited) Looks a little bit warm. Did the moritz guages get completely removed? If running in parallel the oil pressure sensor might be in a less desirable location giving the lower reading. Edited July 14, 2019 by MIm20c Quote Link to comment Share on other sites More sharing options...
irishpilot Posted July 14, 2019 Author Report Share Posted July 14, 2019 Looks a little bit warm. Did the moritz guages get completely removed? If running in parallel the oil pressure sensor might be in a less desirable location giving the lower reading. They were recently removed prior to the sale. Fly Safe,Safety Forum Mod Quote Link to comment Share on other sites More sharing options...
FoxMike Posted July 14, 2019 Report Share Posted July 14, 2019 When I first bought my Bravo my cylinders temps were elevated but not as high as yours. I installed new baffle material in place of supplied factory junk. That helped quite a bit. A lot of work but worth it. You might turn up the oil pressure a little bit. If you are using Aero shell 15-50 in the summer the pressure will be low. I use 100W all summer. Quote Link to comment Share on other sites More sharing options...
carusoam Posted July 14, 2019 Report Share Posted July 14, 2019 Let’s invite @donkaye & @mike_elliott to the discussion too... -a- Quote Link to comment Share on other sites More sharing options...
irishpilot Posted July 14, 2019 Author Report Share Posted July 14, 2019 Let’s invite [mention=7354]donkaye[/mention] & [mention=11242]mike_elliott[/mention] to the discussion too... -a- Thanks@carusoam. I'm going out to the plane in a few hours and will pull the cowling and take some pics. Also will have our A&P take a look on Monday. Fly Safe,Safety Forum Mod Quote Link to comment Share on other sites More sharing options...
Danb Posted July 14, 2019 Report Share Posted July 14, 2019 My normal temps 90* on ground, this around 6-8000 1 Quote Link to comment Share on other sites More sharing options...
irishpilot Posted July 14, 2019 Author Report Share Posted July 14, 2019 @danb, thanks for the photos. We found the lower seal on the #2 side was folded back instead of forward. Baffling is in good shape. fixed the seal direction and will test fly shortly. Fly Safe,Safety Forum Mod Quote Link to comment Share on other sites More sharing options...
carusoam Posted July 14, 2019 Report Share Posted July 14, 2019 Rotating Dan’s data... 1 Quote Link to comment Share on other sites More sharing options...
Danb Posted July 14, 2019 Report Share Posted July 14, 2019 IP it’s easy for the right frontside baffle to get bent down good chance you’ll have to replace that section. A msc put my cowling on and flying home I noticed an increase in my cht’s it stayed with a permanent crease once I changed it all was well again. Quote Link to comment Share on other sites More sharing options...
irishpilot Posted July 22, 2019 Author Report Share Posted July 22, 2019 We checked the baffles and ensured no folding in the wrong direction. Temps are a little better, but oil temp and #2/3 cylinders are running hotter than I'd like. This is what I was running today at 4,500' on a local flight today. This was with cowl flaps cracked open just a bit. Fly Safe,Safety Forum Mod Quote Link to comment Share on other sites More sharing options...
LANCECASPER Posted July 22, 2019 Report Share Posted July 22, 2019 6 hours ago, irishpilot said: We checked the baffles and ensured no folding in the wrong direction. Temps are a little better, but oil temp and #2/3 cylinders are running hotter than I'd like. This is what I was running today at 4,500' on a local flight today. This was with cowl flaps cracked open just a bit. Fly Safe, Safety Forum Mod At 4500 in the summer in Texas I keep my cowl flaps full open. At the cruise speed of the Bravo I don’t like low altitudes - too much speed at high traffic altitudes with airplanes that sometimes don’t have transponders. If I’m going any distance I’m above 10,000, usually in the mid-teens. Turbo charged Mooney’s like it much better above 10,000 and it’s much cooler. On another note your volts seem a little low at 27.6. 2 Quote Link to comment Share on other sites More sharing options...
Davidv Posted July 22, 2019 Report Share Posted July 22, 2019 Maybe you already answered this question, but how many hours on the engine? From what I’ve heard, low time engines tend to run a little hotter. also, are the baffles original? I just changed mine to @GEE-BEE and I’m seeing a good improvement already (I’ll post later this week after I fly high to see how many degrees I’ve dropped in the high teens). Guy told me yesterday that even a 1 inch gap somewhere will cause 40 degree higher temps. See below for a before picture of one of mine. 1 Quote Link to comment Share on other sites More sharing options...
irishpilot Posted July 22, 2019 Author Report Share Posted July 22, 2019 I'm going to go high on Friday and will be watching my temps closely. My baffles are orange and in better shape than the ones pictured. I'm looking forward to seeing your GEE-BEE results.Fly Safe,Safety Forum Mod Quote Link to comment Share on other sites More sharing options...
Bravoman Posted July 22, 2019 Report Share Posted July 22, 2019 The Gee Bees made a significant difference for me, as I recall an average of 12-15 deg reduction. Quote Link to comment Share on other sites More sharing options...
Davidv Posted July 27, 2019 Report Share Posted July 27, 2019 Quick question for the others on this thread - my oil temp is consistently 190 or below on flights below 10k. Yesterday, I was at 17.5 and my temp crept up just above 200. I know with the turbo working and higher altitude it should go up a little but was hoping to see if others have seen the same at higher altitudes. Quote Link to comment Share on other sites More sharing options...
irishpilot Posted July 27, 2019 Author Report Share Posted July 27, 2019 Quick question for the others on this thread - my oil temp is consistently 190 or below on flights below 10k. Yesterday, I was at 17.5 and my temp crept up just above 200. I know with the turbo working and higher altitude it should go up a little but was hoping to see if others have seen the same at higher altitudes. what power setting are you running?Fly Safe,Safety Forum Mod Quote Link to comment Share on other sites More sharing options...
irishpilot Posted July 27, 2019 Author Report Share Posted July 27, 2019 I'm going to go high on Friday and will be watching my temps closely. My baffles are orange and in better shape than the ones pictured. I'm looking forward to seeing your GEE-BEE results.Fly Safe,Safety Forum Mod So I went to FL150 and didn't see much change. I can't run 50 ROP as my #2 CHTs hover just above 400. I've got to run between 75-100 ROP, which puts TIT around 1520-1550 and the CHTs just under 400. FF is around 18.5-18.9 gph. This is with both 29/2400 and 30/2400 power settings. Fly Safe,Safety Forum Mod Quote Link to comment Share on other sites More sharing options...
Davidv Posted July 27, 2019 Report Share Posted July 27, 2019 29/2400 for me. When you say you didn't see much of a change was the temp still 203 or slightly above? Quote Link to comment Share on other sites More sharing options...
irishpilot Posted July 27, 2019 Author Report Share Posted July 27, 2019 29/2400 for me. When you say you didn't see much of a change was the temp still 203 or slightly above? if I ran it at 59 ROP, then 402-405 CHT. If I ran 75-100 ROP and trailing cowl flaps a crack, they stayed at 392-395. When I descended, I set 28/2400 and saw 370 CHT with lower oil temps as well. Here's a screenshot. I'm surprised one inch of Mp is making that much of a difference.Fly Safe,Safety Forum Mod Quote Link to comment Share on other sites More sharing options...
Davidv Posted July 27, 2019 Report Share Posted July 27, 2019 Thanks, and what altitude was that picture above taken at? Quote Link to comment Share on other sites More sharing options...
irishpilot Posted July 27, 2019 Author Report Share Posted July 27, 2019 descending through 11,000.Fly Safe,Safety Forum Mod Quote Link to comment Share on other sites More sharing options...
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