Just golded all these challenges this weekend and man, was it fun and frustrating.
Like most, bronze wasn't hard but from there, you really need to figure out how to shave those 4 secs off.
A major help was the vids on youtube, so thanks for everyone that posted those up but one thing I noticed is that since the vids are all replays, the section times don't show, so here are the rough section times needed to gold (these are for lap 1, since lap one is going to make or break the gold time, usually for the 2nd lap, the sections times should be around .5 to 1 sec less then your lap 1 times). FYI, I do use a wheel.
Nurb
T1 - Sorry, but I don't have this one bc the time comes right before a corner and I never payed attention to it
(EDIT) From the help of Sharky, "Anything sub 20.0 is good here, faster than 19.7 is ideal"
T2 - 33.8 secs - 34.2 secs
T3 - 48.8 secs - 49.2 secs
Lap 1 - You need at least 1:04.3 to 1:04.4, but to lock it so you can make a few mistakes and play it safe on lap 2, aim for 1.03.8 which is what I got
A major point on this track for my time was the RTL Kurve to Bit Kurve (you can google track map see what turns these are, but its pretty much the S curves before the chicanes), I was taking these on 3rd gear when I watched the youtube vids, saw they were taking them on 4th gear and not braking on the Bit kurve, so I tried that and shaved some major time off. Best to brake and take a clean line into RTL and then once you get to Bit Kurve, let off the gas a little and hope the down force will keep you on the inside exit line. This for me was by far the hardest one bc I didnt know the track very well and this was the 1st one I did, so had to get used to the car.
Aid
Skid Recovery ON (dont know if gold times are possible w/o this aid on)
ABS 1
Everything else off
Monza
Just cut the 2nd chicanes (I used 3rd gear) and Gold should be very easy, took me 20 minutes to get gold on this.
Suzuka
T1 - I think this was 26.30 secs 26.9 secs
EDIT - T2 - from help of Sharky "52.3 on lap 1, low 51 on lap 2"
Lap 1 - Needs to be 1.04.8 to 1.05.3 for the 1st lap, last lap just get the total time for gold
For me, the hardest on this was the chicanes braking point, but thanks to pappa1310's vid, I realized a good reference point is the "Suzuka Curcit" you go under. Right before you pass it, you should brake and it will give you a decent line to take the chicanes.
Aid
Skid Recovery ON (dont know if gold times are possible w/o this aid on)
ABS 2
Everything else off
Hope this helps some of you that are looking for reference and good luck!! Try to remember just to have fun on these and if you are not improving your times, it might be good to take a break and do something else for 10 minutes, you need full concentration for these challenges.
PS - For anyone discouraged at these challenges - if you golded the GT4 Mission 34, the one on the ring with the SLR, you can gold these challenges. IMO, the mission 34 was much harder then these challenges.