The stock Met clutch springs (Green graph lines) hold the motor near 4000-4500rpm while accelerating the wheel to a speed when the clutch locks. See the step in the first 2-3 seconds at the left of the graph. The Blue springs (Blue graph lines) allow a higher rpm launch (~5700rpm) than stock clutch springs, improving acceleration from a stopped position. After the clutch engages, the power will be determined by the engine speed and variator setup.