If you want this done, you will need to contact Bob Minnis: Bob Minnis <bobminnis@comcast.net>
Apparently, Midwest Mooney is either out of business or no longer doing this work. Here is a recent correspondence with Mr Minnis:
The 310 up-grade is an easy one to do.
Your engine, the TSIO-550-G is rated at 2700 RPM,S & 310 BHP, unlike the Ovation engine, the IO-550-G is 280 / 2500, that is why we had to have an STC on that engine.
All you need is the Airframe STC to allow you to use the rated BHP of your engine. Your prop governor will have to be removed and sent to a repair station for conversion, depending on how much time you have on it, it may be best to just have it overhaul and set for the “T-20” setting. This will let the prop go to the 2700 RPM’s.
The Hartzell propeller high stop’s will need to be adjusted, this requires the spinner to be removed to gain access to the adjustment, any A/P should be able to do this. The prop is not removed from the aircraft for this adjustment. There is a section in the Hartzell Manual that tell how this is done.
The G1000 is the only issue, Garmin will not up-date the software. There two ways you can accomplish this:
Install a small TSO tachometer.
Install the Ovation III software in you G1000. What will happen with the Ovation III, you will not have a “Red Line “ for your MAP. The FAR requires that, so to stay legal you would need a MAP gage installed or you may can get an exception from
your local Flight standards to allow for a one field approval to have a placard for the MAP. This is a CAR 3 aircraft and most all turbocharged installation certificated under CAR 3 has restriction applied by placards.
The price of the STC is $6,750.00. If I can answer any question, please feel free to call or e-mail me.
Bob