Did you know that you can boost on 'My Sims Racing'? No? Well then, this is how to do it. In a race, you are supposed to press X to boost, but it doesn't work at first. Unless, you powerslide. That's right. Powerslide. While turning, press & hold R. Your driver will jump & then start turning a little bit tighter than usual. After that flames will come out of the back of your car. To keep in control of the powerslide, use the arrows. You'll start to see a little bar on the side of the screen start to fill up. That's your boost meter. How long you can boost for depends on how full or empty the bar is. Simple, right? Maybe not.