I've had GT5 since release and only got gold on this 3 days ago. Here's some tips...
Setup tips.
*Manual transmission
*ABS on 1 if you can handle a little bit of lock up
*TCS off, it slows you down hugely
*Brake bias can be adjusted to suit your style. With a higher value at the back the car will tend not to understeer as bad and will dive into corners much better
*Active Steering on. Like it or not it greatly helps your lap times
Driving tips-
-Get into 4th while in the air from the jump
-Brake late and hard, get into 2nd and dive for the inside of the first right hairpin hold the line as tight as possible
- Turn left as hard as possible, tap the brake to slip the tail and hold a tiny slide. Accelerate midway through the corner and hold tight as the car runs wide towards the right hand wall
- Continue turning left while braking, and dive hard fro the apex, if your'e going slow enough you should be ready for the next corner
- Cut onto the dirt, going as fast as possible, and hold tight as you zoom toward the bridge.
- The sector time on the bridge must be 35.5xx or better. If it isn't, you will not be able to beat the target time
- The right hander soon after is hard. Rather then taking the inside line and going slow, brake later, stay wide, accelerate smoothly mid way through the corner.
- By the tunnel you should be doing about 83 mph
- Get into 3rd for the quick right-left after the tunnel, this aids acceleration out of it greatly
- For the last corner break late, stay wide and make sure you hit the exit apex going as fast as possible
Facts-
#You will not get it first time, don't be discouraged if your first attempt is 1 or 2 seconds behind gold, you will cut it down quiet fast
#If your time's start to consistently slow down, go do something else. It can be easy to fall into a trap of "I have to finish it now or all my work will be wasted.." But that isn't the case. After a few hours you will be alot more focused and fast.
#Keep trying whenever you have spare time, it takes some people many hours to knock this off and some think this challenge is harder then golding Vettel. Be patient and the reward will be yours
#Don't try golding this for money/xp/gift car. You get less then 20,000cr, 3000xp and no prize car. if you want any of that, do seasonals instead
Last tip i have is to watch this video! (not mine but i used it alot) It shows the perfect lines for every corner and the speeds you should be shifting at.