Well, there's a problem. By lap 2 at Suzuka, using default aero settings, the front tires are hitting 130-135 temps and the rears aren't much less. Basically, you've added so much downforce that it's cooking the tires within just 2 laps of *careful* driving. Adding even a single brief front lockup (at any time) sends the tire soaring into the bright red 140-150 range - at which point, the race is effectively over. This is not realistic. Maybe the new downforce levels are correct, but the tires simply can't handle them. This was tested at various initial inflation levels and always with the same result: Badly overcooked tires by lap 2. By lap 4 the race is over, since the tires are all bright red and the grip falls off to nothing.