The CHTs on your graph look good and pretty consistent, not high enough to cause alarm. But since it's a change from the past could mean something. What kind of fuel injection do you have? Have you done a GAMI lean test to see if all cylinders are peaking near the same fuel flow? Since you say this happened on takeoff it could mean that cylinder is a bit lean compared to others: if it's a new issue perhaps the injector on that cylinder needs to be check for a bit of trash etc.IO-390 A3B6 800 hrs:
Noticed high EGT on #3 at T/O today. Also substantial increase in CHT. so downloaded the graph
Runup and mag checks ok. Inflight mag check also showed no odd behavior.
Any suggestions on further diagnostics?
My son fought one of these for 2 months. Cleaned injectors and lines, replace intake gaskets and coupling. Wound up being the flow divider.You have a partial blockage in the line or injector to #3. This is classic APS class stuff.
Why?
1. You have a noticeably higher EGT when full rich. If you went LOP it would run rough.
2. You have elevated CHT (assume this is unusual also) so it confirms a less rich mixture along with elevated EGT. Note this is not a lean mixture, just a less rich or not rich enough.
3. If it was a plug that was faulty or fouled, you would have an elevated EGT but nowhere near that much. And the CHT would be much cooler than normal. A fouled or faulty plug/lead usually gives about a 80dF rise. Just like doing a mag check.
Carefully clean the injector and line. There may be a small chance of a bit of junk in the fuel divider, but most likely in the injector.
My son fought one of these for 2 months. Cleaned injectors and lines, replace intake gaskets and coupling. Wound up being the flow divider.
David,Yeah that can happen. Usually a bit on gunk in there, or was it a faulty unit? Not much to be faulty as they are very simple but never say never.