No sorry i didnt really explain these cars dont like dump valves as the air is metered so it causes the car to over fuel as your dumping the air to atmosphere so they have DV or diverter valves that redirect the air to the intake so theres no fuelling problems, the only way you can get the chatter/compressor stall noise is by pulling the vac lines of the DV's so that the turbo's stall hence the risk of snapping them, hope that all helps.