My BDR had an open diff with 3:46 gears. I put about 3000 miles on it with the non LSD. It layed rubber with both tires every time. No traction problems at all. I now have about 1000 miles on a Matrix Motorsports 3:73 LSD. Still lays rubber with both tires
My 1/4 mile times may be better with the LSD and 3:73 gears but I am sure it would be the steeper gearing and not the LSD as I never had one wheel peel with the open diff.