Ahhh, my favorite topic of all... How to tune RUFs!!
To tune a RUF, you must first know how to handle a RUF. And I don't just mean throttle control and steering input. But the most important aspect of RUF driving. Weight transfer. Remember, the engine's in the BACK!!! wayyyy out there behind the rear wheels. So you have to be conscious at ALL times of where the weight is and get a feel for how it will react to throttle and steering inputs. Which also means you must know the track and the line thoroughly. With the RGT at 550PP on Sports Soft tires, I've managed low 9-minute laps at Nurburgring 24h. Faster than an SLR McLaren on Race tires!!!
I have a delightful setup for my RGT which i wasn't gonna release yet, since i was working on other crap for my tuning thread, but i guess i'll let it go by the end of this week. Link to my tuning thread is in my signature
I also have a RUF CTR2 setup already posted but it's Pre-Spec II.