My baffling has the slot in front of cyl 5, as well as a piece below #5 fins to keep the flow attached on the underside:



I also have modified the oil cooler baffle behind #2 to let air get around back and it also has a piece below to keep the flow attached:



Finally, I added baffles between the two horizontal intercoolers and the cylinder heads:




----- Original Message (EDITED) -----
From: "Jeffrey Liegner, MD" <liegner@embarqmail.com>

Notice cyl 5 is hottest.  Ususally it's cyl 2.  Do you have the small
rectangular cut opening in front of cyl 5?