[dunham]

I am new to the WRX world but I know my turbo basics. Most of my knowledge comes from turbod MR2 and Supras in which case you can use a boost controller to raise boost past the Fuel Cut point without even thinking about the ECU. Why are these WRXs so delicate to raising boost? On an MR2 you can raise boost from a stock 12psi to 17-18 psi safely only requiring an upgraded intercooler, spark plugs, and a Fuel Cut defender and any other type of basic bolt on (downpipe, exhaust, etc) all on a stock turbo with no piggybacks or reflashing.

edit* ok i just read stileguy's response and that is exactly what I was getting at. It shouldnt matter that you raise your stock boost slightly. your MAF sensor is there to detect the amount of incoming air and adjust fuel pressure accordingly. Thats the whole reason behind fuel cut. The ecu will cut fuel and retard timing at a preset boost level (17psi i hear in wrx) as to prevent from knock. So why not use a boost controller to raise boost to 16psi or 17 with a fuel cut controller like the HKS FCD. In cold winter conditions boost tends to creep higher simply because of the cold air. The ecu knows this and adjusts fuel accordingly.