If you're running too rich you are losing power but running rich is way better then running lean. You want that perfect mixture of afr to get optimal performance from any vehicle.
I had a SS cobalt before the camaro and I went from sc to turbo and I was on a rich tune for three months. When I get a good tune and leaned her out I gained 70whp lol she was a beast! Don't expect that much gain from a n/a car tho, its just an example.