Patent ID: 7546200

Claim:
A system for determining and displaying a volumetric efficiency of an engine of an automobile, said engine including a plurality of original equipment manufacturer (OEM) sensors and an electronic control unit (ECU) coupled to said plurality of OEM sensors for operating said engine based on reading a sensor output from each sensor of said plurality of OEM sensors, said system comprising: an aftermarket display unit configured for installation into said automobile; and a controller, said controller including: a first memory configured to store calibration data associated with at least some of said plurality of OEM sensors and displacement data associated with said engine; a plurality of controller inputs coupled to said plurality of OEM sensors; and a controller output coupled to said aftermarket display unit, said controller being configured to execute program instructions to: read said sensor output; determine said volumetric efficiency based on said sensor output, said calibration data and said displacement data; and display said volumetric efficiency using said aftermarket display unit.