Okay, so in Cars 2 you can perform air tricks to be able to gain more energy when you go off of ramps. There's a 360 Front Flip, 360 Back Flip, 360 Barrel Roll, and a 180 spin. Why is it 180? Well you also have the ability to Backwards Drive on the ground to be able to gain energy slowly on straightaways. But that's not exactly all that useful, and we'll get into why later on. But anyway, another thing about 180 Spins is that one trick no matter what will always give you 1/4 of a boost meter. This includes 180 Spins. You can probably see where this is going. You can basically get twice the amount of turbo energy with a 360 Spin that a 360 Front Flip, Back Flip, or Barrel Roll. Now back to Backwards Driving. Why is it useless you may ask? Because it is only useful for straightaways AND it gets energy so slowly. The other option, however, is a little more viable. And that is the Two-Wheel Drive. The Two-Wheel Drive is another straightaway option for gaining turbo energy, but while it can't turn for its own life, it CAN go through certain hologram arrows seen on the courses and gain you additional energy just like drifting on the floor arrows nets you more energy. If you follow this guide 100%, you will more than likely be on your way to speedrunning the game.