I have a s2 rs turbo running mfi, im buying a fiesta rsturbo engine and loom. Has anyone done this before? if so can anyone tell me what is involved, is it a straight swap or are both looms incorporated into each other to make existing things work such as rev counter etc. Advice on this subject would be most appreciated as im totally in the dark

 

It's been done hundreds of times, best to search the forum.

 

you could just get a 90spec efi xr3i loom as they fit straight in a s2. then the ofac frst setup plugs staright in and if you want to run ofab you only need to change a few wires on the loom. easy.

I know the wire changes needed if you run ofab.