Just installed (Westach) CHT & EGT thingies. My EGTs run pretty even @ 1400 in cruise & 1500 in normal climb. Happy.
My CHT gauge won't come up over 100* C, and the old spark plug sensor/gauge reads 200-220.
Install: I removed the allen-head plugs out'a the top of the cyl's & installed the hollow plugs for the sensors to screw into. Is this the wrong hole to install 'em? I see (open) threaded holes in the bottom of the head casting, would it make any diff. to install 'em down there? Relation to the head/plug/etc is about the same, but the airflow is down, of course.
Maybe it's the gauge that's foofy. (Mary's term)