AutomobileMag.com: M5 vs. S6 vs. E63: Benz wins
This is where I must disagree. A torque converter essentially multiplies torque. It allows the car to use the higher, mid-range band of torque right off the line. Careful selection of stall speed will allow you to drive the car hard right off the line with minimal tire spin. I would estimate that 60 ft times would decrease by 0.2-0.3 sec with an E63. I saw 0.3-0.4 sec reduction in 60 ft times with a 2600 RPM-stall converter in my 5500# truck.
Street tires are basically a compromise. Harder rubber compounds are used to enhance milage, and they use tread patterns that work well in rain. The softer compounds provide better dry traction, but they suck in the rain and the poor milage means frequent replacement. WRT to LSD - using your logic, LSD is to too much low-end torque as a loose converter is to not enough low-end torque.
Every car/truck that I've put a high-stall converter into.

http://www.bmwworld.com/models/6er/m6/smg.htm
http://www.bmwworld.com/models/6er/m6/smg.htm
That is pretty funny. Sorry. I guess some of the owners are almost as behind the times as Mercedes itself. Just kidding... well not about the factory.
So, you wanna talk track car or 1/4 mile? Our discussion to this point has been 1/4mile and all you say is EVERY car you have had can beat the E55 out of the hole. LET ME SEE? That easy.
Talk is cheap, as is theory. Classes are about $20/unit at the community college.



