Quote Originally Posted by Steve Webb

How long does a standard turbo take to fully spool up then? Surely it can't be longer than a couple of seconds?

Steve
If you disconnect the hose from the wastegate actuator, then boost will raise over 1 bar in 1st and 2nd gear, but it can't with ECU control, because it doesn't allow higher pressures in higher RPM, which is why you see only 0.7-0.8 bar boost in 1st and 2nd gear, because there is no time to raise the boost at 4000 rpm in 1st and 2nd.