Originally Posted by
Doug from Hondata
All piggyback computers have one thing in common. They run a microprocessor separate from the ecu's microprocessor to take over command and control of several of the sensors / injectors/ ignition etc. Typically wires are cut or intecepted in a piggybacked system
The Hondata system does not work in conjunction with the stock ECU. It is the stock ECU. It is a modified stock ECU that is upgraded to be programmable. It uses only the stock microprocessor. By this definition the Hondata system is not a piggyback. Had we integrated and built our interface unit so that it fitted inside the ECU, there would have been far less confusion.
The interface box for the S200 systems we attatch, serves as an interface for datalogging and for connecting a clutch switch. No wires are cut or intecepted between the ECU and the sensors.
The S100 systems are completely internal, but lack these features.
There are various methods of programming the ECU from real time using the ROMulator to removing and reflashing the chip we provide. The options are there simply to lower the entry level cost for those people who simply want a well tuned system and do not want to make any changes. These people actually make up about 80 + percent of the people who buy a Hondata system. Adding real time programing for every system would substantially increase the cost.
The Hondata system is a standalone with various levels of reprogramming capabilities depending on the options purchased
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