I flew my P-47 on September 3rd for the first time since I had a cylinder failure back in May. Flew great but I never got above 1/3 throttle after takeoff and the engine temp got up to 371* wayyyyy to hot. I spent that Sunday evening and most of that Monday making a baffle for the engine and tested it that afternoon. Even at full throttle it got up to 330* but cruising around at half it would hover around 300*. It was still too hot but I had't tried all my ideas yet. It was 95* here on that day. I have since did the header wrap. On just the circular part of the exhaust. That brought it down to 277* on an 89* degree day. I see that someone had an exhaust ring failure that broke off the ring off. I may still keep my wrap on a little longer.
I didn't check to see if hot air came out of the cowling or check the sides of the plane behind the cowling to see if it's warm but I will next time I go fly.
MD