If running low boost, all an intercooler is going to do is kill your boost in lower gears. Run water/meth, much easier and more effective on a turbo. For an oil scavenge pump, make sure to use a brass gear rotor design, not a modified rubber diaphragm based pump, as they always leak all over the place. The big issue with turbo fuel control is that the boost is not linear. You can have near max boost with very little throttle opening. The design has to be able to interpret the boost and match the fuel regardless of percent throttle opening. Closed loop o2 sensor feedback operation is where all the trouble shows up. In closed loop, the ecu targets 14.7 afr regardless of anything else.