IMO, the best online tune for these cars, is one that is derived from yourself, and your own driving style.
I heard someone chat and say "use huger cambers!"
so I tried, 5 / 3 , and failed miserably.
I reverted back to my smaller 2 / 2 ish, and all was better.
Try using softer rear ARB, to keep the back from snap oversteering.
Try to use softer dampers for elevative tracks, i/e Laguna Corkscrew.
use smaller toes than default .50 / .50 ,
some say max downforce! that is also hogwash, it sucks the car to the ground "too much", these cars need to float favorably a bit.
I even used a touch of ballast, and it did wonders I am not sure why, again maybe placebo, but GT5 seems to like weight , on high HP cars.
experiment with LSD, and be good with the throttle. * don't take sharp long apexes in too high rev. don't abuse the throttle for the win. a Stable car beats pros that wipe out 3 times.
Spread your gear ratio's evenly, and adjust FD to track, taking note of ideal FD for apex exits, and top speed for desired lap times.
Decrease Brake BIAS , for this car already stops on a dime. Hopefully this will change in Spec 2.0
Some of these things in mind, and try different tune settings, I fell on what I thought was a great tune, until some guy joined us and beat us +2s per split! in every race.
