I wonder if an Aerovee turbo is a reasonable substitute for a O-200A. They supposedly have the same horsepower rating, though vendor of the Aerovee Turbo claims that it does not lose power as fast when going up in altitude when compared to a naturally aspirated engine. I live at an altitude of about 4300 feet (about 1300 meters).

There is a partially completed Davis DA-2 for sale locally, without motor. That aircraft normally takes a O-200A, but I was wondering if a Aerovee turbo would work OK in that aircraft.

By the way, the Sonex looks a lot like the Davis DA-2. I wonder if the Sonex design was inspired at least in part by the DA-2.