I am tuning my 2002 mustang gt with 5.4 supercharged lightning swap. I have return fuel system set to 40 psi with 420lph fuel pump. deka siemens 60lb injectors. sct ba2600 maf and pulley. I am having problem setting the injectors. I tried the data from previous forum but it act really weird. Also tried to cut the flow rate high, low and breakpoint along with the engine size and still does't work. the best result I got with the gt500 injectors data and raping the maf slightly, but had problem with cold start it goes very rich and has lean spike when press on the paddle. I tried to increase the transient table with no luck. I think my problem is the injector data. does anyone now what is the correct way to tune it or correct data for these injectors? Also, does the ba2600 has a specific transfer function? any ideas or suggestion would be appreciated.