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

Our track has divided all the races in half. Half d.o.t tire, half slick only races.
So i dug up my old street tires and rims as the first race is d.o.t only race.

The street tire/rim combo weight 8 lb more per tire. so 16 lb total
The plus side is that the tires are two inch shorter. So i should be closer to the rev limit,at the finish line, with these tires.

The bad news is that i don't think i can get them to hook off the line. Even if i leave at a idle.