Cylinder #2 and to a lesser extent #5, tend to run higher CHT's. There is a "washer trick" described which involves putting a -3 washer under the baffle support angle of those cylinders in order to create a larger gap in order to promote more airflow over those cylinders which have relatively small fin area presented to the slipstream. In addition, on cylinder #2, I trimmed down the support angle as well, in hopes of increased cooling. Previously, I'd removed the RV-10 baffle blockers, but left the drilled out rivets in place. I removed the drilled out rivets and reaccomplished them. Finally, I put a coat of Aerothane on both of the support angles. The first test flight showed a mild decrease in CHT of 5 - 10 deg such that cylinder #2 runs about 15 deg hotter than #1, but #2 and #5 are still the warmest.
