Two comments:
1) Change the rumble pads. As far as I've seen, most people don't drift a turn at 90deg to the corner, they'd spin or stop.
2) Avoid using that perspective. It is barely ever used because at that view, the car looks as if it is a toy. You don't ever see a real car from that view, Most are seen at eye level. A toy on the other hand you see most often from that perspective.
3) For a nice smopke effect on the back wheels, use an eraser and lightly (key word) erase some of the back half of the car in the right places. It looks pretty radical if you get it on the nose. Be careful though.
Other than a couple little mistakes, your drawing is lookin' good, keep it up.