I'd urge you to go back and watch some of the "b" movies from the '60s and '70s that were Tarantino's reference point for Death Proof. It's actually very faithful to the kind of thing that only had the money for one, maybe two, big action scenes. The rest of the time had to be filled with story by someone who had no business writing a screenplay and acted by people who had no business acting in a movie. These were terrible films that only made money because they suckered people in with cool posters. Most didn't last a week, only to be replaced by the next terrible movie with a cool poster. That's what Tarantino was going for. The difference being his dialogue loses authenticity by at least being kind of interesting (depending on who you ask). Otherwise, it's a lot more faitfhful to the concept than Planet Terror, which is basically Rodriguez doing a parody of a Troma film.