I know that, but it is a far cry from a Detroit locker in terms of strength or grip. Even with variable lock, it still should be off when you launch in a straight drag style run. I know you realize this, but when you launch, simple is better as far as differentials go because you want all the power transfered to both wheels, not have the car fighting over which wheel will get the drive motion. When people modify cars with either more power or a different gear, the factory electronic TCS differential becomes less effective. However, it is a nice feature for when you are going around a rough turn at a stoplight and walking on the throttle, it really grips.