I'm a tuning noob, but I will advance my own anecdotes (maybe the plurality will magically make it data? ;-):
tl;dr / cool story bro version: Theory: Outside wheel getting more powerrrr from high Accel. Not sure about Initial effect (still). Also, Brontosauruses are thin at one end, thick in the middle...
Anyways...
I was jonesing to race some humans. I often look for GT500/300 rooms with SRF off, since there are often some to be found in AUS, and it's not too hard to pick a not-useless car and drive. Found one, good ping, Deep Forest. Nice. Then the host changed to High Speed Ring, and picked Weather Change (Sunny, probably randomly). Uh-oh. It was a bad idea, since all I wanted was to try and race steadily and cleanly, and I made the following utterly moronic error(s):
Takata Dome NSX '06, stock, racing softs, setup a lightly tweaked (since dumped) version of:
LSD: 20/50/15
Suspension: 10/-15, 14.5/14.5, 10/10, 6/6, 5/5 - Camber 2.6/1.5 - Toe -0.05/0.20
The more experienced will probably already know what happened, since I'm hardly a lightning-reflexed driving virtuoso. The above setup (millross' for WRS 17) was intended for R246, offline, DS3 sensitivity 1, active steering strong, which I don't really like, and certainly wasn't allowed on this occasion).
I went out on track. I got to the first high-speed banked turn. I went splat.
I said, "Durrr .....oh, yeah", and backed out and fixed the dumb offline ride heights. Zeroed the front toe, because I wasn't sure. Dropped my Sensitivity down to 3 or something. Guessed a Transmission. Went back in, had to race.
I went splat a lot, especially on cold or even slightly worn tires. Spinning and blocking/ramming on that straight when I was trying to get out of the way and just not hit people was seriously painful, so I gave up and apologized.
Later testing revealed what all the more experienced racers probably already knew:
1: Weather Change and Sunny doesn't mean the track is dry (perhaps unless it's set to Fixed). C'est la Guerre. Suspected just by looking, online meant even less grip, naturally.
2: That Accel setting was killing me in that situation (high speed banked turn, slightly too much speed/slip angle, MR twitchy car). Violent death every time. Probably would do much less damage to a wheel user with more feedback and no weird slip-angle aid, or someone who actually knew their lines, zones, and maximum speeds on that track.
3: It does it even at the default 10/40/20 and otherwise completely default suspension settings even with Racing Softs in said context; a Xanavi GT-R 08 is much more stable (duh), but it can still occur - go over that slip angle, you're dead. Dial the Accel down to 20, you're fine. No need to touch anything else yet. Lose the Weather Change or just go offline, no problem.
4: Later testing of various cars around Tsukuba, I was trying out a Ford GT LM '69; stock settings, R3s. Deadly on-throttle oversteer, outside tire glowing. Hrm... 💡 Drop Accel, much easier to control. Still needs tuning, but less doing the deadly sideways action.
Re-reading the discussion in Hami's thread (nice to see you!), I can kind of see where this plays in. I often seem to get some results from higher Initial depending on track and car layout, but I know my driving style needs a lot of work.
