Below is a recent retune on a GD WRX which came in with knocking issues. Before and after results can be seen on the power chart.

By adjusting the AFRs and timing correctly, we were able to smoothen out the torque, while gaining overall HP and Torque, with a little more boost. Note that more boost and timing around the dip at 4700rpm would have smoothen out the torque curve, but having none forged internals on a WRX, pushing the engine further was not an option.