Piston Duke and EGT/CHT

[meh1951]

Does not seem accurate. Every flight seems to have the same values. Mixture has a little affect but Cowl Flaps don't seem to have any affect.

Anybody else??

[Black Square]

Cowl flaps have a significant effect, as does airspeed, ambient temperature, side slip angle, pitch, and even the extra load from the air conditioning compressor. Just set up in cruise and configure one cowl flap open, and the other closed. When all combined, these effects can cool/heat the cylinder heads by as much as 200°F.