Racing battery question

when located in the trunk of the car it helps with weight transfer and traction. the extra amps it provides is also nice if you don't run an alternator on your car. one would think that the extra weight would hinder the goal of faster E.T.'S. that is true to a certain point. however, many a car has ran faster times by adding weight to the rear of the car. sometimes as much as 200 lbs. better traction means more power to the ground, faster 60 ft times, and overall faster E.T.'S