[JC]

Originally Posted by sleeper393

in saying , you could put the XR HP engine in a forte and run the standard ecu , without any drama's , but you need the XR ecu to gain the benefits , now in saying could i put any series 3 auto XR6 HP ecu in once you have installed the hp donk , doesn't it affect your original key's , etc , etc.

BEM controls security, so if you change the ECU at all, you usually have to get it paired to the BEM (or vice versa, BEM to ECU). If you want to put an AU2/3 engine in an AU1, you either have to use the AU1 engine bits like coil pack, alternator etc as they are different to AU2/3, or just replace the engine bay harness with the AU2 one, or splice in the AU2 bits you need (if you decide to use AU2 coil packs).