I redline at 11,000rpm
Try replacing the stupid stock plastic clutch line with a stainless steel one. The stock one likes to swell, especially when hot. I felt mine do this, and wouldn't let clutch fully disengage. No probs after ss line went in. Brake fluid is shared with the clutch system, so high temp fluid is what you need anyway for both.After 6 sessions at VIR, some extra aggressive driving with a top instructor in my final session - I had a complete clutch failure..
There are so many contradictory threads about the S550 clutch and bleeding, I could be here all night reading. Any ideas welcomed about the bleeding and future prevention.