Most powerboxes are simply an expensive resistor(fooling quantity adjuster feedback signal) with plugs.
To fit a "chip" you need to desolder original eprom and preferably solder standard DIL28 socket, so you can change it easily.
I've bought cheap (e)eprom programmer, some electrically erasable memory and I'am currently working on my own remap to suit my needs, actually testing 15-th version.
Good engine ECU remap can even alter gearbox behavior, so it can use torque better, but it needs stronger torque converter and gearbox, as it cannot handle too much torque(too much slip) below 3000 RPM and can give you gearbox fault.
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To fit a "chip" you need to desolder original eprom and preferably solder standard DIL28 socket, so you can change it easily.
I've bought cheap (e)eprom programmer, some electrically erasable memory and I'am currently working on my own remap to suit my needs, actually testing 15-th version.
Good engine ECU remap can even alter gearbox behavior, so it can use torque better, but it needs stronger torque converter and gearbox, as it cannot handle too much torque(too much slip) below 3000 RPM and can give you gearbox fault.
.