Hello group,

I have first started my engine with a closed cowling and let it run for about 10 minutes on ground. The data I have seen on my engine monitor are not that clear to me and I want to ask the group about recommendations.
Engine is a Lycoming O360 F6A1 with a plenum which is sealed to 90 %. Air inlet is also 1 inch smaller in diameter compared to the normal 360 cowling.
Exhaust is self made (data from CAFE foundation) - tuned - with a muffler inside the cowling (4 in 2 to muffler).

1 . CHTs are all around 185 with the exeption of no. 3. It is also the one where EGT is only 620 wheras all others are at 790. That should not be the case and I am surching the reason. I know I have not written Celsius or Fahrenheit - reason for that is I am not sure whether I have changed the normal settings - for now it is the difference which makes me wonder (It must be F).
I should mention, that I have a hole above no.3 which feeds the heat exchange to the cabin
which is open at this point in time. Could that cause some kind of interference ?

2. Engine cowling is quite close to the exhaust - what is the recommended minimum distance?

3. In case I want to isolate the exhaust for heat isolation, is it better to isolate the exhaust or to put some isolating material to the cowling ?

4. Any recomentations for a pull rod  for the Lancair 360 ? Finally is decided that I need one and do not want to reinvent the wheel.

I hope the questions are clear and be happy for all indications.

Peter
LNC 360 (O360 F6A1, 95 %?)