I was going to ask you guys When you have a set up for more HP you need some sort of tuning for more fuel, and for your ecu to respond/not respond to boost, and so on and so forth. I have a 420a with eagle rods, je piston and turbo and stuff. But i bought this from someone who did all these mods and what he told me was he made a "jumper harness?" which is just a wire pulled out of the map sensor. I have 450cc injectors, and i have a vortex FMU but how can i make my tuning less "ghetto" I looked up things like FCD and Portfueler, I know what MS is but i don't understand the combinations of things like Do i need FCD with a Portfueler. anyone want to give me suggestions on which tuning would be good and what i should look into i looked into what these are but im not sure how they need to be compatible with eachother.