Originally posted by HighSierraHelis
It was such a good day to fly today that I just went and cut a larger arc in the bottom/rear of the cowl for better hot air exit...
That's pretty much what I did. I didn't change the size of the intake holes, though. No need.
The temperature at our field is generally in the mid-eighties. I've had no overheating issues since I opened up the cowl.