Here you will find further information about electronic tuning and technology.
Not all Imprezas are created equal. The 99/00 model year was produced with several different ECUs. This article discusses the mapping and performance differences.
Previously, the only way to tune a 99/00 model year Impreza was to replace or piggy-back the original ECU. This article objectively compares the differences.
Information about the diagnostic data that may be retrieved from the standard ECU.
Describes ECU maps and what they do.
Explains active ignition timing and why it is used.
Describes fuel injector characteristics and what is involved in upgrading.
Describes the pros and cons of aftermarket induction kits, and what is involved in recalibrating the standard ECU to accomodate the mechanical changes made.