Best advice I can give is to get on youtube and watch videos of people who have got Gold. You'll see the lines to take, where to brake late, and other valuable tips on where to gain time and not lose it. It takes total confidence in the cornering to pull it off.
Unfortunately, Suzuka is the hardest of the 3... Monza being easiest, then Nurburgring.
As already suggested, watch some videos as the limits of that car are probably a great deal higher than you're imagining. After that (and, again as mentioned) practice, practice, practice!
Ski Recovery: ON (This is a most for controller users)
ABS: 10 (This has to be at the very least 1, wich is ABS: ON)
Controller Sensivity: 7 (This is a most for controller users)
All rest was off.
However this was by far the hardeste challenge in the game. Monza was way to easy. Nurburgring was hard but I didn't take a day to gold it. Suzuka took me at the very least 5 days to gold it.
Use the RA function to adjust the brake bias, F3 & R8 if I rembember.you'll have to go to controller options to acces it. This gives the car a bit of oversteer. Also use the race line but disregard the brake marks. This got me silver. Otherwise sector by sector , lap by lap. Good luck.
Pray
