Do I have a CHT problem?

[DanH]

Originally Posted by LettersFromFlyoverCountry

I think the first course of action is to swap the probes in 1 and 3 and see what it looks like.

+1. Looks like an instrumentation issue to me.

What sort of spread do you have when you flip on the power in the hangar, after sitting overnight?

[Tom Martin]

You stated that you had a washer under the #3 baffle, did you put one on the number two cylinder?
Also, try a bit of metal tape on the front of #1 to raise the temp here, this may allow more air for the other cylinders.

[Toobuilder]

There are more effective methods to deal with #2 and #3 cooling than the "washer trick" if you find that indication is accurate. Plenty of threads ot the subject.

[Tom Martin]

Micheal is correct, there are some very nice, and even, elegant examples of how cooling can be increased around the back of #3 and the front of #2. With the baffles installed as per plan there is definitely a blockage of air on those cylinders.
But before going to the work of taking the baffles all the way, and making those mods, try a washer, or better yet a spacer about 2" long by 3/4" to see if this does improve cooling on that cylinder.

As has been stated before, cooling issues are rarely one particular problem and need to be addressed as a cooling system problem, starting at the inlets and ending at the cooling air outlet.

[flyingriki]

I thought Mike Busch taught ROP is the most dangerous way to operate?

[carrollcw]

I guess I'll test the cht probes before I do anything else. Busy w family stuff for a few days so I'll post results when I get to it. Thanks for the ideas!