"Do you have a source for this"

Hey, it's what George told me. And a lawyer wouldn't lie, would he?
G

Frankly, 110 max difference in EGT isn't meaningful. As someone else
suggested, look at the spread in FF vs. peak temp for each cylinder.
THAT will tell you if you have a problem or not.

Don't think so...more like 25-50 max...

I assume what you mean is you feel the max EGT spread should be 25 - 50
degrees max? Heck, in an ideal world, it would be zero. But in
reality it may or may not happen. Even the CHT readings (which are a
lot more accurate) probably vary more than 50 degrees. I wish it
didn't... and George has done in-flight tests that show that much
variation just from one side of the cylinder to the other, on the same
cylinder. [Really wish Gami would do their cooling shroud for my
plane, like they do for the Bo's., but just not enough market for the
FAA hassles.]