I really messed up shooting that race day. I had my IS turned on from shooting a wedding the day before and it messed up all my panning shots. I ended up with about 10 keepers out of 300 frames because of that stupid error on my part. I can't figure outu how I missed that in my check list but oh well. Such is life.
Here's the shots I managed to salvage from that mess.
Here's your tire smoke SW