Ok to those in the know the 16 bit ecu presents problems when an owner wants to chip his zed that has a later car with a 16 bit ecu, mostly retrofitting an earlier ecu is the easiest course.

 

However here how it is done using a 16 bit unit, the first couple of pics show a standard 16 bit ecu before modification the last showns the modified unit with a sister board added in, by interfacing via the board edge connector the second board can use duel 28 pin eproms.

 

Simples:wink:

 

 

 

the 16 bit ecu's have already been cracked for ages and those daughterboards have been around for a long time (Techtom Japan were the first in the late 90's)

Nowadays there are also Nistune boards available for the 16-bit ECU's, so you can make realtime changes to mappings and other variables.

 

one of the downsides is however that a daughterboard as in your picture and/or Nistune boards are a lot more expensive then a simple 32 kb Eprom + socket