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In a Flash
In a Flash As expected, the factory AFR at WOT is sporadic and less than optimal for best performance. The chart shows the initial AFR trace versus our tuned AFR trace as captured on the dyno. The after-tune AFR hovered nicely just under 13:1, as desired. This same data could be gathered with the VCM Scanner if the dyno wide-band 02 sensor's output was connected to one of the interface input channels.

In a Flash The PE (Power Enrichment) files are shown here. Tuning the data can be done using various methods. The numeric data can be entered directly. The numbers can be processed using arithmetic functions (plus X, multiply by X). Chart data can be manipulated by pulling points up or down using the mouse. Sections of the data can be interpolated between set end points. Data can be imported and exported. Plots and graphs can be post-processed (smoothed) too. The whole process is mouse driven. The cursor actively floats with the mouse-over, and correlates the graphical point to the numerical data. The editor is very powerful, extremely well designed, and easy to learn.

In a Flash A comparison between the stock PE and our tuned PE is shown. Toggling between two tunes is simple, and comparison files such as these show a quick summary of changes made between two files.

In a Flash The VCM Editor has eight main tuning sections; Operating System, Engine, Engine Diagnostics, Transmission, Transmission Diagnostics, Fuel System, System, Speedometer. Some sections may not apply to all applications. Most main sections then divide down into further subsections of the tune. Here we show a section of the Spark Advance sub-section. Working between multiple tables at the same time is feasible and helpful. The absolute spark advance commanded is actually a sum of various adders and tuners should consider each contributor.

In a Flash Learning and understanding how the ECM operates, and how different tables, algorithms, or adders work together can be difficult and confusing. The extensive built-in Help files cover a tremendous amount of information and detail regarding the ECM's operation. A lot can be learned in the Help files. Reading about fuel delivery (Volumetric Efficiency) and spark advance command will help you understand how to tune.

In a Flash Pesky Service Engine Soon (SES) or Malfunction Indicator Lamp (MIL) lights can be edited to suit a particular vehicle's modifications. The same can be done with transmission Diagnostic Trouble Codes (DTC).

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