Turn Times
Jim, I've considered playing around with turn times before but it seems to me the reported 2F, 4F, etc splits available fall into different spots on the track for different tracks. What are you using to figure the actual turn time around the turn?
Also, My 2 cents on the concept of inside runners vs outside runners in the turn is a much more difficult question to assess. Many have done the math to simply state that every path out from the rail a horse is, it costs them one length. However, I don't think ground loss can be this easily assumed to be a disadvantage.
From an energy distribution view, the inside horse is having to negotiate more centrifugal inertia while also sometimes on a flatter portion of the track while the outside horse may be on a more banked surface without fighting those centrifugal forces of circling a tighter turn. In the end, I think ground loss vs centrifugal forces can often cancel each other out in a general sense and it really just comes down to a case by case basis on the actual horse, track configuration, pace scenario, etc.