Edorfox, I have seen the Duratec and do not believe they are related. The 2.3 Mazda is most likely an version of the MX-3 1.8 or a new engine altogether. It is as you know a DOHC 4-Valve all aluminum engine with "Miller Cycle" which uses a Lysholm supercharger (screw type, low pressure)and two intercoolers.
