What Is Transmission Tuning? Every modern automatic and dual-clutch transmission is controlled by a Transmission Control Unit (TCU) — a dedicated computer that decides when to shift, how fast to shift, how much torque to allow through the drivetrain, and how the launch control system operates. The factory TCU calibration is conservative. Manufacturers prioritize smooth shifts, low NVH (noise, vibration, harshness), fuel economy compliance, and drivetrain longevity over outright performance. The result is a transmission that shifts slower than it could, holds gears longer than it should, and limits torque delivery below the hardware's actual capability. A TCU tune —...

Porsche 992 Turbo S — The 9A2 EVO PlatformThe Porsche 992 Turbo S is powered by the 9A2 EVO (MA1.xx) — a 4.0-litre twin-turbo flat-six that produces 640 HP and 590 lb-ft of torque from the factory. It is one of the most capable forced-induction engines in any production sports car, with a power-to-displacement ratio that puts it among the most energy-dense road-car engines ever built.The 9A2's engineering margin is substantial. Porsche builds this engine for the kind of sustained abuse that 911 Turbos have always been subjected to — which means there's significant headroom above stock calibration that an...