The other day I noticed for the first time that when transmitted on the comm frequency, the EGTs all changed. Huh? When I let up on the PTT button, all the EGTs returned to their former temps. I don't know if this has been happening for awhile and I just never noticed before ( I'm nearly always looking outside when I talk to ATC, not at the engine data.), or if this is a new phenomenon.
When running LOP with EGTs in the -40 range, they all go to around -50 if the PTT button is depressed briefly. They go to around -60 and seem to top out there when I hold the PTT down longer.
Upon landing, when my EGTs were all showing about 400 degrees on the rich side, the numbers also get bigger on PTT and still about the same 10 to 20 degrees.
CHTs do not change, nor does any other engine data that I can see.
A search of these Forums didn't produce anything. Anybody got an idea of why this might occur?
When running LOP with EGTs in the -40 range, they all go to around -50 if the PTT button is depressed briefly. They go to around -60 and seem to top out there when I hold the PTT down longer.
Upon landing, when my EGTs were all showing about 400 degrees on the rich side, the numbers also get bigger on PTT and still about the same 10 to 20 degrees.
CHTs do not change, nor does any other engine data that I can see.
A search of these Forums didn't produce anything. Anybody got an idea of why this might occur?