Heres what u gonna do..
Denso iridium spark plugs,full excaust system,and of course reprogrammed ecu.With these u will reach 120 hp and 16 kg torgue...
If u want serious power via naturally aspirated motor,u can get camms(I use dr schrick) u should raise the compretion at 11/1,lighten up ur flywheel and port the cylinder head-gass flowing.By these u reach 140-145 hp and the torgue rises up to 17-18 kg.
As I have written many times before,Im now checking some other ways for increasing the power of my car,and between them are the forged pistons(probably the displaysment will go at 1700+cc)for high compretion(12/1).This means another 5-10 hp and 1-2 kg of torgue,but I am researching it and this means that I cant tell u for sure.
Also by the end of the next week Ill visit the dynamometer in order to see whether the throttle of the megane 2,0 rs 140hp has given anything..