That track you mentioned is still oval. It is modeled after Talladega in Alabama. The extra "turn" as you called it on the front straight is called a "dog leg" I believe charlette aka lowes speeday has the same type of characteristics. Probably others too just having trouble visualizing them right now. If you want to run just high speed with a touring car run it oval. There are many track across the country that are using 4wd sedan based cars that way. Road course, IMO, is meant to be more than just wide open around the whole track. I think the track at Socal incorporates part of the banked oval into the sedan track. So there is a higher speed portion of the track. I welcome any additions or corrects to what I have said.
Maclin | VP-Pro USA