Here's the main problem I think about mission 12. I still have not beaten it, and I got a feeling I'm on my way towards an ending-attempt-number like AMG but I've gotton better. Anyhow, obviously going 100 around the turns in mission 12 is pretty much impossible, however I don't think saying "learning good braking" is enough. The missing extra peice of info is braking can break your traction, wreaking havoc on your driving line even if your tires are not breaking loose! Let me rephrase that.. I've noticed going into turns HARD and braking HARD leads to a real major problem, which is exiting with a starting speed of something much much lower than what it should be (ideally) and sometimes even winding up in the sand, but obviously speeding through the turns isn't going to work.
I've found that when I'm braking and wind up into the sand, 9 times out of 10 it's because I was on the brake. For whatever reason, being on the brake pulls you out of the driving line pretty hardcore. The solution I found is to stay off both gas
AND brake and just be on the steering, alot of times you'll glide right on around the turn and be placed in a much better situation than just hardcore braking. Now like I said obviously you can't just glide around the corner at like 100, you will still need to brake, but I think alot of times those of us having problems, focus on getting the driving line right and hardcore braking. That'll get you close, but by finding the speed at which the GT can get around the corner (following the driving line of course) without braking and just steering should line people up for success. So let me say it again in a nutshell, get off both of the damn buttons!
I've found, by following the driving line I can
damn near get around the turn after the first hairpin without any braking at all (providing I'm not on the gas). The GT seems to have better slide-traction when not applying brakes. I think this has something to do with why how giving a car the beans on some turns can pull a car towards the inside of a turn and around it. Physics people will recognize this by the term "tangential velocity". I think in this case it is a matter of it's a Gran Touring car and the physics of pushing the car through the turns via gas is just too much for the traction coefficient of the tires on the pavement but braking keeps the front tires from spinning eliminating -all- pulling of the car through the turn and so by
not doing both (braking and gas) you place yourself in that sweet spot you need to be in. I had a similiar college physics problem like this, I can't remember the problem exactly but it had to do with how fast a car could go around a turn. I could probably do up the physics and give actual numbers but I really don't think that's important so much as it is to just understand that there is a connection between not braking (or gasing) and traction (even
if your tires are not breaking loose).
Just something to think about if anyone is still having trouble. As I said I'm still haivng trouble but I think now seeing this and actually seeing my overall ability in this mission improve, I
think I should be not far from actually getting to the 1st place guy. (Yes I still have not gotton to the 1st place guy yet)
On a side note, I had another thought, anyone try the emergency brake, and try drifting around some of the turns? I know the thing can whip around outta control pretty quick if you're not careful with it, but it might be something to try.
EDIT: I also have "Fine Turning Adjustments" off in the player settings, not sure if that has anything to do with my traction issues, but without it I find I have better control over how far I can turn the "virtual wheel".
EDIT 2: I thought about and noticed a couple of other things that might help too. First, if you do not think you will finish the race in first, complete it anyhow, just so you have a replay available. You're not going to be watching yourself but the first place guy. More specifically what gear he is in and how he is taking the turns. Interestingly enough, there are two turns you can pick up on him at, the turn (The left one) just after the corkscrew, If you get on it just right which is pretty easy you can drift all the way around the first half and all the way around the second half, if you position yourself on the left side before the next turn (the right one) you can drift around that one too. Second, you can pick up on him a little bit ib that last turn, he goes all the way down to 1st gear, if you get this turn just right (turn before you get to the turn) you can get negotiate this turn in 2nd. Third, on the corkscrew, he hits those rumble strips, EVEN the left side one. He takes that turn wide. I know myself, probably others, get fearful of the hard left (1st half) of the corkscrew. He takes it wide early on and drives into the corner overtop of the rumble strip, lining him up with the second rumble strip. In reality it seems the best way to tackle this turn. Seems obvious but taking this turn on I always just kinda gone with what felt right which was to take it wide and thread the needle, which places you on the pavement between the two points of the turn. This is normally the correct way, but because you're exiting on a turn it's not a true "chicane" and so he takes it by taking the first half fairly tight and literaly riding on the rumble strip. In other words he threads the needle by shooting for a right exit instead of a straight exit.