"A related cause for unexpectedly poor fuel economy involves an inherent
weakness of the Wankel rotor design when used with conventional fuels.
Some studies have indicated that at high speeds, the rate at which the
volume of the combustion chamber increases in the moments after ignition
actually outpaces the expansion of the burning fuel. The result is that,
at high speeds, less useful energy is extracted from the same volume of
fuel, as the exhaust has to expend time and energy "catching up" to the
rotor before it can accomplish any work."

If that is the case then why is the HP of this 12A p-port engine
continuing to rise in almost a linear fashion all the way to 8800 RPM?
I think this is BS.

Paul Lamar ...No rotor no motor.

What's the drop at 7000? -Jeff (Jeff Martin)

I don't know. Could be a dyno glitch. Or could be the operator.
This dyno is manually controlled. The operator selects a substantial
load, opens the throttle wide and then backs off on the load until
the engine reaches the RPM red line. I think it is called a dyno pull.
The engine is not allowed to sit there and run for periods of time
at different RPMs and loads. That is the way I would like to see
it done but that is very time consuming. Only 10 different RPMs with
only 10 different loads  is 100 test periods. If each one is 30
seconds than that is 50 minutes. You need a computer controlled
dyno to do that. The big advantage is you get a 2D map of BSFC
verses load and RPM. I am sure Mazda does it but I have never seen
the complete data. Here is a map from NSU.

Paul Lamar ...No rotor no motor.

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