A blown diffuser is an aerodynamic design that directs the engine's hot, fast-moving exhaust gases over or through the rear diffuser. This airflow energizes the boundary layer and accelerates the air traveling under the car, creating a lower pressure area that significantly increases rear downforce. The technology requires precise engine mapping to maintain exhaust flow even when the driver lifts off the throttle.
Heard on the job
We need to adjust the overrun mapping to keep the blown diffuser working effectively through the slow corners.