Please check the French P-63C's Engine Injection module

The Engine Injection module is seemingly subtracting power from the plane, rather than adding.

I unlocked it, installed it and in the very next match, my plane couldn’t climb like before, instead of climbing better.

This is in arcade air battles.

P.S.: The main performance hit seems to take place once you pass 2500 meters of altitude, the plane slows down dramatically.