Ever since I had P3 on my car I have always thought my boost drops off to much. Especially after speaking to other people on similar setup.
I get over boost around 20psi then it drops to about 16psi the after about 4.5k rpm drops to about 13psi!! You can really feel the car being sluggish at this point mostly in 4th and 5th.
Have a look at this video. Sorry for the bad camera skills. This starts in 3rd ON A HILL and near the end you can see how the boost drops off.
Does anyone else's boost drop off that much on P3?