The mechanical fuel injection employed can be adjusted to give a fixed fuel injection volume per engine revolution, and this quantity is independent of the airflow. The stoichiometry (equivalence ratio) will therefore vary as the fuel flow is changed. The combustion of the air/fuel mixture will be dependent upon its equivalence ratio, and you should select some range of this parameter to investigate. Liquid fuel is not the only type that may be used with the engine. Natural gas is available for these experiments.

The computer may be used to collect pressure-time and volume-time data from the engine using the E-SCAN program. This data is collected using a digital oscilloscope and the program asks for calibration information so that computations can be made. An analog oscilloscope can also acquire (p,v) data for the engine.