[Schwarzeritter]

On the 901 and 915 you will need to select new gear ratios to achieve the top speed you desire. Beyond that you have a lot of work cut out to achieve 200mph and have things stable. I have never attempted to max out a 901 gear box, I always have equipped them with new cogs and a oil cooler.

With modifed cogs and no oil cooler for the gear box I have had 300TQ on a 915 however the client was not the burn out king. I have seen some very high capacity large displacement forced induction and NA motors with 915's, but all the gear boxs were modifed and featuring oil coolers with pumps and a external resivor.

The G50 is good, but it's not invincible. Still I would up grade it and cooler.
Have fun flying fast!