I can give you some tips. However, since patch I havent done TT anymore. After patch, cars go a bit faster. (before patch I did a 105.0)
-1st turn brake just before 100 sign and downshift very fast to 2nd, also steer very early to the left so you got the inside of the curb. The key here is to keep the car as left (inside) as possible, to immediately take the next corner to the right full throttle over the curb.
-after 1st straight a little before 100 brake hard to 3rd gear and when you are in immediately go on throttle to 4th gear. A lot of time can be won here on exit speed.
-Then when you approach the fast corner to right just before 50m release throttle shift to 5gear, steer as hard and fast to the right so that you go a bit over the curb andas soon as you are on the inside full throttle through the corner. Brake early and hard for the next in 2nd gear, go a bit over the curb if you can to 3rd gear.
-Keep the car in 3rd gear throught lefthand corner and with some practise you might notice that you can go full throttle very early in the left hand corner.
-The next one the the right is not difficult, but is important to not take that corner wide. 2nd should do but you can immediately shift to 3rd on exit.
-The last lefthand corner you should take in 3rd gear and brake before 100 (I think). Brake hard but release it very soon to maintain a relative good speed through corner and go as soon as possible on the throttle. Here, much time can be won or lost. When you do it right, you can hear it because the reffs in 3rd gear are not too low or even low.