[speeder]

I owned the same 911 with and w/o LSD. It did make the car "push" or understeer more when entering a corner with power on, but once I got used to it, I could control under/oversteer very easily w/ right foot. It is invaluable for throttle-steering, which is how any good driver steers a 911. You would never hear any fast 911 track driver, like Tyson or Jack Olsen, debate the value of LSD vs. open dif, except maybe for autocross. It is a "no-brainer" on a serious track car or even a hot street car, IMO. Race cars have very unforgiving, locking-type diffs that make it almost impossible for them to take a tight, low-speed corner. You will see a cup car see-saw around those turns, such as at SOWS.

My car had a stock factory 40% LSD in a 915 that had zero downside for street driving and was a major improvement when having fun/going fast. I would never own another (older) 911 w/o it now, but before I had it I did not really miss it because I did not know the difference.