I'm going to shoot Shelby's/Cobra's at SAAC-40, Shelby American Club 40th at Pocono next week (20-22nd). I will do my best with the A7R-II/Sony 70-200mm G f/4.0 on the track.
I didn't buy this from a Motorsports Lens/camera setup.
I know everyone raves about the Canon 7D Mk II for the track, or sports in general.
I was looking at a friends auto race photo's, he got wheel spin at 200th sec, best were around 160th sec.
That's all I can say.
CaptDave