i cant find a site on the IDM, but racedays has the engine and some specs, as the ofna/picco site has the info on the std engines.
i just run in the EVO 2 today and is the fastest motor i have put in my car so far. the EVO 3 has bigger bore in the crank , better bearings and lightened and balanced crankshaft, and the silicone fill as well. certainly happy with the performance, and awaiting the EVO3 so much so now