"Looks to me like it would go on top, where it was meant to, horizontally. Might need some air ducting, and waste (heated) air outlet. Pros and cons?"
Hello Rich, As others have suggested I would recommend to stay away from any top scoop as the cowling doesn't see much airflow at this location in a climb which is where you will need your oil cooler the most. I have also always thought the stock location above the rear of the engine was not a good choice either as the air that enters the cowl inlets will seek the path of least resistance which will be through the cylinder fins rather than a tightly packed heat exchanger. A lot of the later model Mooney's have gone to flush mounted NACA inlets in the forward bottom section on the cowling with scat ducting to the associated heat exchangers. Bottom line the best setup is a dedicated inlet that forces the air to the cooler and if possible a dedicated outlet. Stephen Teate Paradise, Texas
