The higher than stock base spring pressure within the Forge Motorsports replacement actuator allows for the wastegate flapper to be held closed tighter and for longer against the exhaust gas pressure flowing through the turbo. Forge can assemble their units with any one of 3 different base spring pressure ranges stiffer than stock, so the possibility of the exhaust gas pressure prematurely opening the flapper against this higher spring pressure is minimized, if not completely eliminated.
All of the exhaust gas is then kept within the exhaust housing of the turbo and is forced to continue spooling the wheel keeping boost at its peak potential at all times. Depending upon which base spring pressure is used and how the units are adjusted, you may see changes like quicker spool, less tapering, and an overall increase in the area under the boost curve.
NOTE: Increasing the boost output may require the ability to supply additional fueling or recalibrating the ECU software to accomodate the desired increase in boost.
Please contact Vivid Racing for available spring options.
Fits: 2009+ Hyundai Genesis Coupe 2.0 Turbo