Subwoofer Help or Hurt

I know this is a strange question but here goes, what do you the end result will be if I install a single (maybe dual) 10" subs in my TA? It could help by adding weight to the back (like moving the battery) but then it could slow me down in the quartermile (100lbs = .1)

Either way I am going to put them in just wondering what the tradeoff will be?

it will slow you down, not help.

Weight slows you down. Ofcourse traction may be a issue but I spins like a mofo with mine in or out.

more weight = slow; so add another go fast part to balance the equation.