I think I can post a reasonable guide up to see most through to T2 and no more sorry but I mess up the last tunnel myself ... with my auto set at 270 as 280 just aint enough grunt for me
Ok with a decent tunnel exit and good speed before the lap starts ...
you should be crossing the start line at about 155mph already in 5th gear
Full belt towards the little bridge at the end of the straight!
As soon as your car crosses the
shadow of the bridge on the floor you wanna put your brake on moderately and drop to 3rd gear and make the turn ... its easy to go through the first bend sections without touching any rumbles .... run the revs in 3rd until the middle of the 2 turns redline to about 96 mph and then gear up to 4th in the middle of the turns and keep a nice line to stay on the left hand side of the track of the exit ....
keep power on full and by the end of the rumbles on the left at about 130mph you will gear up to 5th for the right/ left sweep ahead of you ..... you want to gently ride both rumbles on the way through without touching the grass if possible and keep the car nice and steady like a knife through butter

... and you should hit a reasonable 20.3 or 20.4 T1 sector maybe faster if you hit it really sweet!
Full power all the way and stay on the left hand side of the track as you head towards tunnel 1
Entering tunnel 1 you need to drop to 4th whilst braking slightly when your speed is about 157mph and start making the turn and then drop again to 3rd to make it cut in tight to the inside of the rumbles on the right and it will cross over to the left hand side of the tunnel with natural momentum and hopefully you can control it to stay inside the white lines .... carry on forwards and then gear up again to 4th when the redline goes again!
head towards the
sweeping left in 4th gear and find a line to start mounting the rumble on the left before the turn starts and as you hit the rumbles dab the brakes and drop to 3rd and power into the bend it will cut nice and tight in 3rd gear and keep powering through that bend until about 96mph it will turn and take the bend at full throttle in 3rd i assure you and then gear up again to 4th..... and carry on down the hill towards T2 on the right hand side of the track!
If all has gone ok you should be on or close to a 39.5 maybe 39.6 sector ... faster if you done it well
As you cross the T2 sector you gear up to 5th gear again and start turning the car onto the left hand rumbles as the little chicane starts .... stay in 5th and flick from the left rumble to the right rumble without touching grass or dirt again and find a good line whilst on the rumbles and brake on the right hand side and drop 3 gears to 2nd and find a nice line to power through in 2nd and gear up to 3rd again quickly whilst heading towards the right hand rumbles in tunnel 2
As you leave the rumbles in the tunnel you will gear up again to 4th and keeping the car in a nice motion head towards the left hand side of the track for the uphill and ride the little rumble on the left without touching dirt or grass again and head towards the crest of the hill
As you get to the crest make sure the car is lined up to sort of tuck and grab the right hand rumbles and flow through that part and keeping the car in a solid line it will naturally glide over towards the slight bump on the road as you head towards the final bridge .... before you get to the bridge you will be gearing up to 5th at about 130mph again ( I gear to 5th as my car lifts in the air on the bump at the top of the hill) and make your way under the bridge and cross the line 👍
My guide should help until T2 for sure .... but!!! .... to be honest I am losing a couple of tenths in the last tunnel .... so please experiment yourself to find the best way for you

I should get about 4th or 5th with the lap i have now because of my loss of momentum in the last tunnel .... I will be keeping at it myself hopefully.
Hope this helps someone 👍 just read my tips and practice you will see it eventually
Laters