Certified airplane (Twin Comanche) both engines #3 cylinder is always substantially lower than the rest. The air intake is located in that rear baffle immediately behind #3. It is a 21/2-3" hole for the intake. I suspect this attributes to the colder cylinder. Any suggestions on how to raise the temps without reducing the intake air available? Winter CHT on both #3 can struggle to get 200F at cruise. I haven't any problems in 500hrs of use, but my OCD is struggling. 
