Chipped Ecu's

[kraiye]

.. the cars come out the factory with ECU's tuned to run the car at an optimum performance..

everyday cars come out of the factory with a 'universal' tune based on factory bolt-ons, programmed to run at daily driving performance and tuned broadly to allow for international differences in weather, humidity etc etc. although, the ecu's ability to 'learn' does help somewhat to localise the settings/tuning.