Damn... I was hoping someone found some scraps on the net X.x

 

Yes it is already posted in the other threads about the engine, and there is discussion of compression. This topic is better to ask in another section as well, for more expertise. Search is your friend, but only need to look. These thread reside on the first page of each sub-forum:

New higher displacement rotary engine

New 16X Rotary Engine

Mazda debuts new-gen Rotary in Taiki show car

Official pic of Mazda's new rotary engine!

The 16X...

Rotary News site:

http://rotarynews.com/node/view/949

http://rotarynews.com/node/view/947

 

Once you have gone to a 9.7:1 compression 13B motor, then the next way to get more compression is to supercharge it. Supercharges / turbochargers essentially give your engine 2 stage compression; the final chamber pressure is the result of compressing it twice so it is very high compression.