UM Porsche 911 GT3 R

The Porsche 911 GT3 R features a sophisticated braking system with extensive adjustability through master cylinder sizing and brake pad compounds. Seven master cylinder options (15.9-23.8mm) allow precise tuning of line pressure and pedal effort, while three brake pad compounds (Low/Medium/High) adjust friction levels and lockup risk. The car includes a 12-position ABS system with position 4 as the baseline—higher settings provide more intervention to prevent lockups but may extend braking distances if too aggressive for available grip.

Brake bias management is critical and interacts directly with master cylinder selection. Values above 50% shift balance forward, increasing front lockup tendency but potentially improving stability. The manual emphasizes that different master cylinder combinations create inherent bias shifts, requiring corresponding brake bias adjustments. Visual lockup indicators on the dash provide real-time feedback—purple LEDs for front wheels, yellow for rear, with intensity showing lockup severity.

Setup considerations extend beyond the brake system itself. Higher front camber values improve cornering grip but reduce longitudinal braking performance, necessitating rearward bias shifts. Damper settings also influence braking behavior—increased low-speed rebound stiffness can slow pitch changes under braking, enhancing stability and mechanical understeer off-throttle.