smooth~silver_type_s

recently, my car got into an accident, and they had to disconnect the battery. When I got the car back, I noticed that it pulls harder now. I had CT headers/icebox. Before this the car failed to wow, at the dragstrip, with a best of 14.82 @ 94mph(60 degrees, 2.29 60'). I dynoed 227whp/195wtq. Could the disconnecting of the battery have caused the ecu to relearn, and thus affect the power out put?