Drive on the wrong side of the road to keep increasing your boost. This can also be done by driving in the center of a double lane. Drive in the wrong side of the road and use the turbo when you get it. After it is gone, your turbo will either be full or half full. To achieve turbo, go very close to other cars that are not in the race. Very carefully, turn the opposing way. It will say "Near Miss." That will help the bar on your left-down corner to boost up. If you crash, you will lose most of your boost.