All ECU’s use a variety of sensors to determine load. Having said that the tactic employed may differ among engines given that the Silvertop works by using a simple Vane sort airflow meter while the Blacktop uses a more complicated vacuum (MAP) and throttle situation (TPS) for larger throttle openings https://blacktop-4age15936.blogocial.com/everything-about-blacktop-4age-67287688