I don’t have a Nikon, but i do have a DSLR. I have the Canon XTi. I got the 18-55 kit lens. Its ok, but i wanted more zoom for Solo and other racing. So i read and read, on Canon forums, http://www.fredmiranda.com/ and others.
I ended up spending more than i hoped but i got a amazing lens the 70-200F4L
I don’t have any car shots with this lens, but i do have a few of my dog (it was the nice day we had last month and i was avoiding working on my kitchen remodel)
I would like more zoom, but to get the quality that i got i would have had to spend $1000 more, and well that is just not a option. But i have thought about the 1.4 extender and that would get me to 280mm zoom… Not too bad, about what i would want. But if you are going to be taking many pics at full zoom you are going to want a mono/tripod, unless you have ROCKS for hands.
At about 100ft and at 200mm
At about 20ft and at 70mm zoom
At about 20ft and full 200mm zoom
Good luck,
Ken