If Mazda really wanted to, they would make a "15B" like some some have predicted. That would shut everyone up quick, however there is no need to produce a wider Rotary yet.

As for that article, it's complete bull. I have heard about it, thanks for actually typing it up for me to see. By their reasoning, any engine will benifit from IMA, that's not a Rotary specific thing at all. Hell, it definately would help the torqueless wonders that are Honda 4's. As for Rotaries being hard to start, not true. If you take care of the car and break it in properly, you'll never see any flooding problems. On a final note, I don't consider the multi-side port 13B to be so much a "vast improvement" as it is just plain different. The original dual peripheral port design is still superior for absolute power production, but early on the side intake port/peripheral port design was adopted for the first street Rotaries. They where quieter and more well behaved, not to mention cleaner. Emissions restrictions have evolved so far that a side intake/side exhaust engines became nessicary to create a US legal car... not to mention Americans don't like cars that you can actually hear the engine.

Anyway, the 13B is pretty much Mazda's "smallblock Chevy" if you will. It's been in production since the early '70s, and has more then doubled its power output over the years by pretty much moving around a few ports and lightening the rotors and counterweights.

If only Mazda Imported the newest Cosmo to the states, complete with 20B option.