boost lag and fuel economy question

[Error404]

11 is achievable if you try hard
Has it been like this since you put it back together?
I would envisage a mechanical issue or a knock sensor fault which can cause issues without throwing codes

[hunker7]

"Finally working as it should" didn't last long, at least I think so. Basically what bothers me is the turbo lag, which makes car un-drivable around town. Audi says max torque comes in at 1950 rpm, of course I don't know how much truth there is to it, but mine is not even close.

3rd@2000rpm floor it and max boost (~2.5) is reached at over 4000rpm
2nd@idle floor it and it starts boosting at around ~2500rpm and properly starts moving after 3000rpm.

So I just want to know if that's how it should be, or something is wrong.

Seconds problem is fuel economy. Just to say I don't expect 50mpg but I genuinely think 11mpg is a bit too much, and it's 11 regardless of how I drive, floor it whenever I can or being light on the throttle.

No error codes and engine ticks over nicely. Timing is correct (triple checked).

Any help appreciated, as I am genuinely loosing patience.