For suzuka i believe its 2:10-2:16.5 for two laps. IMO the suzuka is worlds harder than the other two for getting a bronze. Not sure about getting golds as I dont see how I could possibly shave six seconds from the bronze time.
You can't customize the car's setup at all really. Just the driving aids, though I've been using the red button on my DFGT to change the brake bias at the beginning of my runs.