No one wants to add weight to there car. But adding some weight in the trunk behind the axle could make a better ET as well as 60" foot.
They say loosing a 100 pound is worth a 10th(.10) right? If you added 50+ pound in the trunk and you ran a .10 or more better 60'....You are faster even though you are heavy...er.
And! way cheaper then a set of caltracs. Also way easier to install too.