Boost leak or its fine?

[basyager]

Recently returned to stock, and flashed cobb stage 0.

Peak boost 13psi.

Did a 2nd gear wot log, target boost not being met, get like 2psi when its targeting 10, get 6 when its targeting 16. Only towards 4k rpm im starting to get some real boost but its still short of target.

Is target boost what it should be at that moment or where its trying to get to?? Also my dam is .688 being a stock tune and all, could that be the culprit?

I was under the impression that "real" boost should closely resemble the target at all times? And if not there is a problem?

also it needs a new turbo to j pipe gasket.

Im like 95% sure there is no leak other than the old j pipe gasket cuz i messed with this car enough times and never had a problem assembling stuff

Please advise