Hmmm, interesting anyway I chose the rotary because they produce less vibration than any piston engine I was aware of, stripped of the auto junk and turbocharged they can easily have a power to weight ratio of 1:1, rotaries are generally smaller in physical size (important for reduced surface area and drag) for a comparable power than pistons and the RPM range of the rotary is compatible with the diameter of fan I'm using. There aren't many stock piston engines you'd want to run at 5000 rpm for hours on end.Quote from Soon2Bgreat:
Flywheel horsepower? That's no problem for an EJ20 or EJ25 (JDM or USDM Sti motors) - throw a 20g or GT30 on there and you're golden. Tough, reliable motors. These motors, much like the DSMs of the world, have spawned a huge host of reliable aftermarket 'packages' that can provide for a range of higher hp applications (as have rotaries).
Can't see the comp map you posted (and the weiner one is too small, haha) - what are the specs of the turbo you are using?
Seems to be coming along nicely.
The turbo I'm using is a Chinese made equivalent to the T76. In hind sight I'd actually have better high altitude performance with the T72, without having to bleed off compressor air.
10psi will be a breeze for that thing. 
