Actually it does have two combustion chambers on each cylinder that is pretty much the main unique feature. Why would the fuel be injected durring induction? I was thinking TDC. The direct injection would allow a computer controled so that fuel could be injected only when it was needed to maintain speed or to accelerate. Also don't forget it runs on diesel. I have the spots drawn in for the injectors (all 8 of them) but I don't have the injectors or lines drawn. As far as bore and stroke I just drew it square for the sake of a simple drawing I still need to do some research to optimise that but I imagine that a longer stroke would be better. I guess you'd be right whomever said that a turbo wouldn't work because the ports are both open at the same time so I guess it would just have to be a supercharger. That will actually simplify the design for me considerably.