How does Hondata compare to ______ (a replacement ECU)?
Generally using a Hondata modified Honda ECU will be cheaper and easier to install and tune, since the factory wiring harness and sensors are used, and stock ignition and fuel tables are provided as starting points. Most other standalone systems require you to start from scratch with the fuel and ignition maps. Most other standalone systems require the use of different sensors and/or major modifications to the engine wiring harness. Other factors in favor of using the Honda ECU are reliability, cost, closed loop operation (management of the engine at partial throttle — something the Honda ECU is very good at, and ability to retain control of secondary outputs like A/C and the radiator fan.
