Phase 1: Buy a JBD or other tune
Phase 2: ????
Phase 3: Profit
But yea, I found brake boosting at 2-2.3k RPM with TC fully off, and gradually increase throttle until you feel traction breakage isn't an issue. Takes a little bit of practice to launch this car without making a 20ft 11
The 4k RPM shift point is pretty good to use, even after a tune. This car just doesn't like going past 4300rpm.
Mods: JBD, 35% tint, Wagner Intercooler, Bilstien B12 Kit, M3 Control Arms, MB Quartz kit sound upgrade