Sweet F1.
I am glad you started a seperate thread for your work. I think everyone should go ahead and do that (from the last comp.) that way more peops will see everyone's art.
Great job.
Oh, just one thing, I know you know this, but the back wheel might need a little more work. Just in case you need/want a tut.
http://www.drawthrough.com/tutorials/index.html
Take care
Alfred