I run the same engine in a Sig Extra 300. My Extra cowling may have a little more inlet area than yours, but not by much. The cowling exit area may be something to look at. You need 2 to 3 times the exit area to allow for effective cooling, from what I have read, and from my experience.

I purchased a Sig Cap 231/Saito 180 from a friend. During the summer months I had problems with overheating. I added a baffle similar to yours, and had to double the size of the cowl exit to cool things down. When I assembled my Sig Extra/O.S. 1.60FX I did the same. Baffle on the left, and large exit. I've flown the Extra in temps above 100 F, without a single problem.

Something else to consider. Did you use a large klunk and tubing throughout the fuel feed plumbing? This is an important requirement. The engine burns the fuel!

Hope this helps! I have really enjoyed my 1.60FX! It's absolutely the most dependable engine I have run to date. Nine gallons of fuel without a single dead-stick!

Rex Rutledge