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Major difference between brz\86 and evo or wrx is that those cars sre factory turbo. So the factory ecu fimware caters for turbo whereas brz\85 is na so the factory ecu firmware has no turbo control in it.
The brz\86 platform has only been arround a few years but unfortunatly tgier were quire a few factory updated roms.
Also as its fairly new not many poeple have come along and developed the sxtra code for boost flex map witch.
One guy ztan has done overboost cut speed density and flex but only on one rom, ie not developed as a patch that can be appled to all the different roms.
This type of work takes hundreds of hours of development by people who already have skills in tuning and ecu code disassembly and code writing c, not somethingyou pick up overnight.
Theirs not many people arroind that are prepared to give hundreds of hours of thier time for free :-)
Ecuflash\tactrix works same for Mitsubishi subaru or whatever. Its a interdace rhat allows access to ecu and allows read\write of ecu rom area.
Definitions simply allow a human readable form of the tables in ecu.
Extra features need to be coded by someone as does logging and even the definitions.
Any extra features sre not provided by ecuflash or tactrix but by generous people who donated their time and effort for free and shared the results of thoer labour
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