cant use a 3i loom you need a loom to match the ecu, or use the guide on rsbible i think it is??

megasquirt is a good cheep ecu ofab is the one for higher boost out of ofab and ofac as you can put a 3 bar cossie map sensor on allowing up to 2 bar of boost

you will also reqire a efi tank and prob a better fuel pump