I want to put an aristo ecu in my sc300 when I turbo it but im not sure how t change the wiring harness for the ecu. I know I have to add a map/iat but im not sure what else is needed. Any help? & and yes u have searched and couldn't find what I was looking for.

 

you posted in the tt ecu mod thread which is the thread for this along with 3 other random aristo threads.
please just post in the tt ecu mod thread, that is the thread which tells you how to do that.
If you need help continue posting in the end of that thread I see you have also posted there so you should know where it is. Its easy to install the aristo ecu you need the map/iat/ ignitor/ and injectors and do a little wiring at the ecu.

Post 1 and post 4 in the tt ecu mod thread tells you how to do it.