I know I have to upgrade map sensor once I wanna crank up the boost and also the fuel pump and injectors.
As for the fmu I gave it a shot since I ordered it.... Now this is were the horror begins. The thing was built incorrectly, at idle it was backflowing my injectors making me run 10.1 at idle!!! Wtf!!! So I took it apart and had too do some serious modification in there, had too cut the spacer ring so the disc could slide through the spacer.. Then the plunger was too tall and causing it too close without seeing boost. I cut the plunger and now it works great! Running 13afr at wide open throttle... But there is a slight down fall, I can feel a delay in the fuel. Like it takes time for it to backflow the injectoes but once it kicks in man it feels great! I'm gonna shoot a video of my setup just too share my experience with fmu