Serious Speed Required Firm Springs and Big Brakes

The R-Tuned’s suspension uses Motion Control Suspension coilovers with Vogtland springs that are adjustable in three ways: both high and low speed compression as well as for rebound. The spring rate went up dramatically over stock to 900 lb.-per-inch. Part of the reason for the large increase in stiffness was because the car’s aero package develops so much downforce. In fact, during testing with softer springs that splitter would get pushed into the ground.

Amazingly, the team uses stock suspension arms, swaybar and bushings up front as well as spindles and wheel bearings. The race-spec 14-inch Brembo discs use 4-piston Monobloc calipers. The small grease mark that can be seen on the disc changes color with temperature. That helps the team know the peak temperature those brakes hit. DG-Spec says that light brown color corresponds to a low temperature—exactly what you want for a braking system.