Some of those look good to me on this poor monitor at work. The one of Eric appears decent and #84 looks like a hit. I'd like to try to flash some of the pans like Emile but I never seem to get around to it on a regular race day, sometimes I get too focused on getting the regular volume of shots instead of the stuff I want to shoot.
When I shoot pans of late it seems I use TV (shutter priority) at between 1/60 and 1/100, set the iso to 100 and let the f stop end up where TV priority sets it with the conditions. I shot a bunch of pans this weekend but don't have access to them at work, if I get a chance tomorrow afternoon I'll put a few up with exif. All my pans are on the ground, been trying to find a jump around here with a decent background to blur instead of just sky!