I had around 60 27's using 1.1 cruise. I was losing time at some place or other.
Some advice when trying to get 26: Make sure to turn when there's a turn. That saves a couple of tenths. Also, there are reports that shooting a guard in the train somehow saves time, but this is crazy talk. You'd have to make a turn while trying to keep strafing straight ahead, which is impossible. You just lose time, so forget it. Finally, you can't go through doors, so make sure to hit to 'R' button when you get to one to open it. If you hit R and right on the crosspad at the same time, the door will open twice as fast, so that helps.
Good luck!