I have been trying to optimise the CHTs on a carbed 0-320 for several years, changing baffles and routing, using light to test for possible leakages, adding lower cowl vents and covering a third and half of them, modifying the lower cowling for better extraction, every time I make a change I get different results. The hottest cylinder has been 1,2 and 4, to complicate matters I have Lasor...