Taking this thread in a different direction.
Gonna, this statement you made really concerns me.
"Or should I just make long conversations in the car and lots of stupid redundancies to act as filler and bore the reader to get my "required" 85 pages?"
This reveals a serious flaw in your thinking.
Perhaps it was just an off hand comment but if you wish to be a successfull writer you can NEVER entertain such ideas.
Gosh, I mean breaking into the business is hard enough without making ourselves loopholes or excuses for bad writing.
And what you thought about doing would be bad writing, plain and simple.
It's a cop out and you should be ashamed of yourself for even thinking it.
Shame!!!! Shame!!!
Bad writer!! Bad, bad, bad, bad writer!!!!
"I will not EVER, ever, EVER, EVER, EVER, EVER entertain the notion of writing filler just to make page count in a script again." written one thousand times on my desk by noon tommorow.
It is one thing for someone like Lucas to writing scene after scene of people and holograms sitting on round cushins somberly discussing the fate of the Universe and quite another for a novice writer to bring the pacing of the story to a screeching halt just to make page count.
He is George Lucas and it was the last (maybe) Star Wars film ever.
The spec screenwriter cannot allow themselves to indulge in mediocrity. Every single page, every single item MUST be vital to the story.
You must stretch your creative muscles. It won't be easy, may even hurt, but if you pull it off it will be worth it.
Yes, it's perfectly fine for you to have a movie full of car chases. Speed and Terminator are excellent examples. You've just got a big challenge before you in coming up with something we haven't seen before.
Brainstorm.
What vehicles can you use? Haven't seen a good Zamboni chase in a long time.
What strange places can the chase happen in? The chase scene through the mall in Blues Brothers was great.
How do the characters involved react? "Man, this place has everything."
Have all your expostion dialog take place during the most thrilling moments.
Switch character places. Instead of the race car driver behind the wheel put his babysitter there, or mother.
Shake it up.
Anything worth doing is worth doing right.