Disclaimer: I am certainly no expert on how to set this specific car up. The 14 races I've driven this season are the only 14 races I've ever done in the V8 Supercar. The philosophy behind these setups is taken from my previous experience with GT cars, especially from GTR/GTR2.
All setups have soft suspension: Soft springs and soft roll bars, this is to maximize grip. It comes at the expence of control, but for me it is worth it. I'll take grip over anything, any day of the week. At some tracks (like Lime Rock) I had to stiffen up the springs a little and raise the ride-height in order not to bottom out in the wrong places, but roll bars are always soft, especially at the front.
Cross weight (except in the setups from early this season when I didn't fully understand the concept) is around 47%, in order to get rid of the problem of oversteer in right handers and understeer in left-handers. At some tracks I run more like 48%, because I want the car to turn better to the right, while at others it's the other way around. But 47% is a good baseline I think.
Since Laguna Seca onwards I am running quite a lot of rear toe-in. I noticed this helps in getting the power down in this car, possibly at the expence of a little higher tire wear (in the races I was always faster in the beginning than in the end compared to the opposition).
I have often been using the Watts Linkage to find the right balance, especially on the entry of the corners (at the exits I feel rear roll bar makes a bigger difference).
Camber at the front is around -5 degrees, rear -3, to make the inside of the tires around 5 degrees (Celsius) hotter than the outside. I am often using slightly more camber on the left than on the right, at tracks with a majority of right-hand bends.
Tire pressures are set up to keep the middle temp between the outside and inside temps. At tracks with many right-handers, this means higher pressure in the left hand tires, and vice-versa.
I have not played with the dampers at all, partly because I don't fully understand them, but mostly because I seldom feel they make much of a difference anyway.
Brake bias is set up for my driving style, which involves using a little bit of throttle under braking to stabilize the car. Also, locking up the fronts cause a huge amount of tire wear in this car, so I have been tending to set the brake bias pretty far to the rear. Sometimes also to help the car turn in. Depending on your driving style, you may want to go further forward with the brake bias.
I have left caster at 8 degrees all season. Don't know if it's the best setting, but using a lot of caster is usually a good thing, especially in cars that don't really want to turn. At Watkins Glen I used a little bit of caster-split (less caster on the right side) to help the car turn into the right-handers, don't know if it helped much though.
At Road America and Road Atlanta if I remember correctly, you will notice that the car hits the rev limiter at the end of the longest straight. It's meant to do that, using a longer gear settings loses too much time in other places for me.
Generally the setups from later in the season are more developed than the early ones. Especially the VIR setup should be taken with a grain of salt, it was very much a shot in the dark.
That's it I think, feel free to ask if you have any questions!
Oh, the naming of the setups:
ViS = Virginia South
LiF = Lime Rock Full
RAm = Road America
SiN = Silverstone National
Lag = Laguna Seca
RAt = Road Atlanta
WaC = Watkins Glen Cup
BrI = Brands Hatch Indy
ZaN = Zandvoort National