How much will adding 16 lb to my car affect ET/mph(rotating weight)

yes i have already corrected that.:BangHead::D

If i had the money i would just add dual battery in the truck, that would help a lot.........Someday
Was thinking about bar bell weights. Simple/easy to get a hold of. but will have to think about how to secure them.

Maybe i will just throw in a couple of 3d member and forget to take them out at the track. Just kidding. just something i did as a youngster because i was Sooooooooooo afraid that i was going to brake a rear end on my 318/276 gear car that i all way cared a spare axle and a third member:wtf::D