Can one of you please tell me what the lift and duration on a std Q4/Integrale cam is?

I have noticed that the boost on these cars are very high when compared the amount of power made. With a smaller turbo(T2.8 Garret) stuck on a std TS at 0.5 bar boost delivers more than 220 whp at 1200m above sea level.

The theory for hydraulics say a pump make flow and a valve or restriction in the system cause pressure. When running an engine the flow through the induction pipes, throttle, intake manifold and the valves will create this pressure. From a std TS I do not see large differences, what cause the boost pressure to be higher on a Q4?