Quote:
Originally Posted by Dimman
^ Isn't part of the problem that they can't do all the fancy valve-timing stuff for emissions, because their 'camshafts' are the ports that are carved and unmoveable in the housings?
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That is one of the many problems the Rotary has to overcome. The 16x is going to have much narrower rotors (70mm down from 80mm) which will reduce hydrocarbon emissions as a result of "wall quenching." Rotaries have a much larger surface area per volume than a piston engine and the combustion chamber moves which results in unburned fuel being swept along and pushed out through the exhaust port. The reason for the second spark plug is to ignite that unused fuel, but much of it is still just dumped out the exhaust port. The 16x's narrower wall helps both of these issues because their is less "wall" to quench and a higher ratio of volume to surface area = lower hydrocarbon emissions. They're also adding DI which is a big step if they can get it to work, and more torque from their new higher essentricity(more peanut shaped) design.