D McQuinn and RTK > Are you taking readings from both cylinders, or just one?
My right cylinder on a 100 is showing higher temps by about 15 to 18% on average.

Still working on the best setup for the Yak.
It's hot here, and my in flight temps are higher than I'd like to see them.
The left cyl is averaging 253°, and the right 295°

I've made some louvers for the cowl, but am still working on getting the hot air out.

Have a good holiday
Bob