I'm the same way, with it not gelling for me. I want it to, but I'm having problems.
As for spinning out on T11, that's a problem for me too. We just need to remember that we're not in Gr.4 cars, so our racing line needs to be a little different, and we can't hit the gas so quickly after the apex. It's hard for me, because the Gr.4 method is so ingrained.
Guess most of my Road Atlanta racing has been Gr.4. Gr.3 is a completely different challenge in that corner.
Some cars are hugely better than others. You have to be so careful on throttle and learn when you can only do 25%, 50% or 75% throttle.. From what I was trying last:
Genesis-X - Fast but it is actively trying to kill you at all times on RM tires. If you apply any more that 50% throttle with any turn on the wheel it will power oversteer to the left on turn 10 or to the right on turn 11. I have my fastest time with this car but I could not race with it. I only manage to complete a lap about ever 4-5 tries... Found out I can only drive it well when on softs.
M6 - currently my favorite - almost as fast at the Gen-X but easy to drive in comparison. Very planted. Can still spin out turn 11 if you apply more that 80% throttle though.
4C - joy to drive and fabulous handling but slow. 2s off the pace.
911RSR - Should be my go-to car but can't match the M6 currently. I need more time with it and it is still susceptible to spin out if too much throttle is used.
AMG - very planted and easy to drive. Have not been able to match the pace of the M6 though. I feel this should be a very good car for this track but I do not have the experience to get the best our of it yet.
RCZ - found this to be skittish handing and did not enjoy it. It was also off the pace but that could just be me..
GT-R - I know this is up on the leaderboard but I could not just get any pace out of it.
R8-LMS - found this to be very competent and was the car I originally got my best time in. Relatively compose in the chicane.
Did not try anything else yet.
Since they updated the curbs they all feel like they are wet now annoyingly.
Ignoring the sausage curb lottery just generally all curbs aren't track anymore but a weird form of punishment for pushing!
What is killing me is the tire-curb dynamics. On Gr.4 you usually barrel over the curb but with a lot of this cars, if you so much as look at a curb you are quickly pointing backward or rocketing off into the grass. I'm having to drive consciously trying to avoid any curb contact which is hard at RA.
Tuning does help with the chicane to a degree. In some cases, get it wrong, and it makes the car overly grip to the point of power steering off. Get it right and it allows a little push and slide to prevent spin out, but too much and you lose all traction and just slide off with no mechanical corner grip. It's a balance act. My fastest times were with tune but I have been trying to see which car is drivable and competitive without tune and then work it from there.
Nothing gives me confidence yet. How are you all getting into the 1:18s? I am so far off the pace!
So I may give the GR Corolla a go at race A.