That is very nice mate! I'd like to hazard a guess with such an intercooler you will be running close to what a stock evo 6 produces in terms of power! As for the temperature, zetecs do run on the hot side and 80-90 on the move is very good and it should be if you have an alloy rad but 120 is getting on a bit must be said. Are the fans working as the should kick in around the 100 mark iirc.