Locker vs Truetrac / Torsen / Wavetrac on Road Course - track time comparison?

[Uhcoog1]

I've got a nascar locker in my car right now, and I'm considering 'upgrading' to a worm gear differential. Thoughts on how much 'better' it would be? Say, on a 2.9 mile road course? On 'street' tires.



I'm hoping to find input from someone who has swapped from one to the other and has lap times to share on what the change netted in performance.

The biggest deficiency in my car right now is me. If my money is better spent on additional track time and tires at this point, then that's what I'll do. But at the end of the day, I want to run with well driven modern cars, and that means my car needs to be there as well.

Car: