I have a 99 TJ 4.0 running 7.5 PSI of boost but am pulling out some timing to keep the engine from knocking. For fuel you can either run a FMU or a computer modified signal. I started out with the fuel management unit but am switch to the computer. The FMU works by boosting the fuel pressure as soon as you hit boost. With this mod, the map sensor is left stock. The computer modifies the map sensore voltage and tells the ECU to inject more fuel. This is the better of the routes if possible. Either way, the guys to talk to are 505 performance. They are producing TJ turbo kits.