The smoke sucks, but if you would of made the rims spin, it would of been a lot better picture. And play with the colors, contrast, photo filter, brightness at the end. Don't leave the picture so raw at the end, otherwise it looks like unfinished picture.
To make better smoke, try using more layers, and don't make it a bit wider and a bit more around the wheel. And it looks like the smoke is only coming from the left tire.