I expect that by the fact the advert says "could do with a standalone ECU" it probably doesn't run perfectly. My friend turboed a VR6 golf on a budget and he just added a load of fuel pressure, upped the injectors and got some dodgy solder in chip off the net...it was a right old bodge but the car was still very quick, it just didnt drive well.....

I wonder if someone has bodged it enough OR does this ECU run closed loop as standard and maybe has compensated a bit to alow the extra fuelling etc.?