I just picked out some mods for my car. I started out running 1:27s and after adding parts I got it down to high 1:23s. This was in offline practice mode.
A few pointers I found after following my ghost around. I have the stock 5spd transmission so gears may not match up with everyone
Turn 1 is pretty straight forward. I brake hard just before the yellow retaining wall ad. I am full on the brakes through 5th down to 4th, down to 3rd. When I reach 3rd I start lifting off the brakes and use trail braking to turn in. Near the apex I drop to 2nd and accelerate and track out.
For turn 2 I hit the top of 3rd gear and I shift to 4th just to keep the RPMs from causing tire spin. I start wide, lift off and pull in tight and get back on the gas. Tap the brakes and trail them as you down shift back to 3rd for turn 3. Hit all your apexes through 4 and you'll reach the top of 4th gear.
For turns 5 and 6, exit speed is far more important than entry speed. Brake early, downshift to 3rd, and turn in while trail braking until you can see a straight line through turn 6. Then gas through turn 6 as if it were straight. If you get it right, you'll have to shift to 4th for just a moment before you approach turn 7.
Hard on the brakes for turn 7. Don't turn in too early because you can get on the gas sooner with a late apex.
Turn 8, I go full throttle to 4th gear. About midway through you will reach the limits of traction. Before this happens, ease off the throttle and get the car to the inside. Do not let the tires turn red because you will run to wide. Shoot for a very late apex. You don't want to reach the curbing until 80% through this turn.
Exiting turn 8 into turn 9 is full throttle. Put two wheels onto the left side of turn 9. Right after, tap the brakes to get the car to turn in for 10. Put two wheels on the right side of turn 10, goose the throttle a little for a little extra speed before the hairpin.
At turn 11 you can gain or lose up to 3 seconds. The turn is a squared-off hairpin and I will refer to the two inside corners as apex 1 and apex 2. If you hit 9 to 10 right you'll be on the right side of the track. Angle your car to go diagonally from the left side of the track to the right side as you approach 11. Brake in a straight line aiming for the far outside of the track. Do not attempt turn in with your foot on the brake, you'll just understeer and cook your tires. All your braking must be done in a straight line. When you get to about 30-35 mph you should be on the outside of the track just about to pass apex 1, turn in aiming for apex 1, but don't expect to actually touch it. Coast around as tightly as you can. Save your tires for the exit of the turn. As soon as you see apex 2 appear on the left of your screen, ease into the throttle and use 2 wheels into pit road if you have to as you track out.