ok, so i did the Japanese cup in the r34 and it is a great car, and it excels at the nurburgring. Except for one thing. there is some mild understeering that I don't know how to get rid of it.
So here is a decently tuned setup that needs a little fixing up. If someone can figure out how to fix it, then excellent. It probably has to do with the LSD as I never touched that thing.
Parts: Everything including stage 3 turbo and racing soft tires
Currently At 780 hp, 1264kg
Aero: 0 / 28
Trans: Top speed 217 - it gives a decent range in each gear. could probably use fixing though
LSD: 10 / 40/ 20
Center Diff: 40 / 60
Suspension:
Ride Height: -12 / -17
Spring rate: 10.7 / 8.9
Damp (ext): 6 / 5
Damp (comp): 7 / 8
Anti Roll: 5 / 4
Camber: 2.9 / 1.9
Toe: 0 / 0
Brakes: 6 / 5
I give credit to Rac3rX - from the link in the last post I made. It was the basis for my tune, and I just changed things around.