I posted in the drag racing forum as well but want to specifically hear from the s550 guys. What kind of 60's are you seeing and what method to get there. I've been struggling to just get 2.0's. I have not slipped the clutch too bad but I did get the best result that way. Just curious what you guys are getting. Leaving at 4500 just causes the car to bog down. Roush supercharger, long tubes and a drag radials.