This means that in some instances you might not have access to maps that you need to adjust or the outcome of a certain change may not be what you expect to see. Some are obviously critical like fuel or ignition tables, however some maybe harder to work out and their interactions may not be so clear. What I mean by this is that there may literally be thousands of maps inside the stock ECU. The ability of the software is also limited by the accuracy or completeness of the definition files. The downside is that since it's opensource, you are often somewhat on your own in terms of support - There is no manufacturer you can jump on the phone to or email if you have questions although there is a large forum based community to turn to. So the upside of this software is that it's basically free with the exception of the outlay for the cable (I think evoscan is something like $25 USD). If you're looking at flashing EVO X or V11 STi, you will need the Openport 2.0 cable as both these platforms are CAN based. These require the commonly available Tactrix cable to connect to the OBD2 port. The software I most frequently use is the freely available ECU Flash package as well as EVO Scan. You can then make the necessary changes and flash them back into the ECU. This gives us a graphical way of viewing and altering the maps much like we would expect to do in an aftermarket ECU. What the software packages provide is an interface and a definition file that defines what maps are contained inside the rom file, how big they are, and what addresses they are located at.

You start by reading the rom file out of the ECU but this raw data is not overly useful by itself. Feel free to jump in and share your experiences BENchmark - This is a collaborative forum and I'm certainly not an expert in every field :) I have spent a bunch of time over the last 10 years reflashing late model Subaru, Mitsubishi, Ford and GM though so I'll share the basics here.Īs has been mentioned already there are a variety of software packages that allow you to tune or reflash the stock ECU.

Tactrix openport 2.0 evoscan