I was working with the 10-22mm, the 50mm prime and the 70-300mm, as I'd lent out my 18-55mm to a mate!
I've not had a chance to dice anything down and these are straight from the JPGs out of the camera, on a colour profile nearly as lairy as the 1/60second exposure I was running.
To be honest I rather prefer having more scenery around the car than just having a photo of 'a car'. Obviously this works better when there's more of the curvature of the track in the shot than just the plain track, but I'm expecting a low number of keepers when playing on these settings - leave the 'stopped motion' shots to those who are just shooting commercially.