For me, the best launch technique on a stock (or near stock) 6-speed LS1 F-body is ASR off, keep the RPMs at around 2200-2300, slip the clutch just
a little bit without mashing the throttle, but rather steadily increasing the amount of throttle while letting out the clutch.
The goal is to keep the rear tires at maximum grip while on the threshold of spinning them. A
very small amount of wheelspin works for me. You'll soon feel when your tires have hooked and you can then put your foot to the floor without breaking them loose - that point comes pretty fast when I use this technique.
Again, this is with street tires.
It takes practise to get the timing and coordination just right, but once you nail it, it's relatively easy to maintain consistency as you use your senses to learn the right sound and "feel" of a good launch and can make miniscule adjustments while in the process.
When I used to drag race the car, my 60' times on street tires would usually fall somewhere between 1.97 - 2.05 using this technique.
I would much prefer the challenge of coordinating all this to get the perfect launch as "getting it right" provides a much greater sense of satisfaction for me than having computer software do it for me. It's a similar sense of accomplishment as nailing a difficult double-apex corner on a road course and as a result, the car ends up in just the right position on the track, 'cuz you were able to (finally) achieve your maximum exit speed on the corner!! What a rush!!
I'd never suggest that I could launch a car as well or as consistently with all the helpful technology that's available today, but I can't see myself having the same level of enjoyment of driving the car if I were to relinquish these aspects of control to the electronic nannies... well... maybe if I could turn them off at will!
Best regardSS,
Elie