tcarrico wrote:

They have the displacement at 654cc x2, or 1308cc.  280 hp from 1300 cc's,
wow!

tc

Not out of line. Remember it is LIKE a two stroke. One torque pulse
per rev per rotor. Actually the NA peripheral port racing  engines
have been generating that amount of HP at 9000 RPM  since about 1990.

If you take the NA 210 HP at 6000 RPM Power sport engine and run it at 9000 
RPM it will probably generate about 280 HP. The recent breakthrough
at Mazda is the casting technique improvement  on the rotors making
them lighter and allowing long term durability at 9000 RPM.
 
Paul Lamar
 
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