I just tried the S2000 GT1 Turbo for the first time in the second Premium Sports campaign race, and was surprised by two things:
1. The car's handling when turning in AND when on the power out of a turn, and
2. I was still able to win easily even though I was all over the place. Have they dumbed the AI down even more than it was already?
Anyway, I'd be interested to know if there's an explanation for the lack of stability, is it a suspension thing or related to the differential's torque settings or something? I'll try these tunes but I was really hoping for a predictable ride that you could push hard for Tsukuba time attack, but it's definitely not that!
Edit: I tried
@praiano63's tune, excluding power, weight and transmission settings and compared it back to back with the stock settings with a lap around Tsukuba on RSS tyres, in two laps (because I spun the car just before the finish line) with their tune my time was 0:57.686 and with the stock settings on my first lap I got 0:57.940. Both laps were messy even by my low standards but to my mind that tune isn't a significant improvement.
Then I did a really quick, rough tune to 'brute force' the oversteer out and did a 55.9 on my first go, which is faster than the one lap I've done in the Isle of Man Impreza, which is AWD, only 40bhp down and a comparable weight, although gearing favours the S2000 for sure.
I dropped the ride height to the minimum, natural frequency and anti-roll bars to the max, left dampers, camber and toe set to the defaults, put LSD initial torque and braking to the max and acceleration to the minimum. The car is a bit harder to steer but since the problem was that it was oversteering everywhere it worked out OK, at least for Tsukuba! I might work on it some more but I rarely play GTS, I only picked it up tonight to try the S2000 and as I'm not convinced it'll ever behave exactly how I want it to I can't really be bothered.