ORIGINAL: kgwomack
Doug, just also wanted to add. The Shroud and fan do not work. I have heard of vibration issues and fan blades breaking. Also, Where does the fan get the air? It's up against the spinner backplate???? I highly recommend using the ducting method.
Karl; thanks for the reply, the Fan gets air from a 'lip' or 'vent/scoop' built into the front of the shroud that directs airflow from the Cowl Chin opening into the shroud area; I have also heard of vibration issues cracking the fan blades, does your Revo vibrate as bad as what others have described; I'm glad to hear about someone is not having a overheating issue with their Revo and I thought about venting through the fuse as well; something to consider; tell me something, does your oil cooler vents stay open all the time?
At this point I have been reluctant to use the Revo in my P-51 and use it in a P-40, which has that other small air scoop on the top of the cowl, and Cowl flaps for Air Exits and run a DA-60(soon to be released) in the P-51; however, your venting through the fuse success has me reconsidering.