Originally Posted by
MattMPS3
Not entirely true, an Xede or standback will regulate the voltage (boost) seen by the cars MAP sensor, allowing higher boost levels than the cut is programmed, i.e ECU will still only think its boosting to 15.7 psi where as real world manifold pressure can be around 18-19, which is why it is imperative to have the car professionally tuned to compensate for the added boost and the effects on the cars AFR's.
The big boy flash is more so aimed at fuel cut, a different kettle of fish all together.