Data Log - Underboost: Stage 2 HPFP

[kstaack]

Hello!

I have recently tuned my car to Unitronic Stage 2 HPFP, and I am not getting the power and boost I would have expected. I am not here to discuss different tunes, but I want to know what could be causing this underboost. I have read plenty about the waste gate issue that others are having, but I am not entirely sure if this is the problem. I am hearing a whistling sound when I am WOT... Also, I am not getting any codes for underboost.
Here is my car:



I have owned the car since 127,000 miles and its at 170,000 miles, and I have never done anything with the turbo/wastegate and the N75. I have replaced the DV, timing belt, water pump, timing chain, vacuum pump, HPFP, Autotech HPFP internal, catless downpipe w/ o2 spacer , PCV, charcoal canister bypass, purge valve, and I think that is it for motor and emission work. Here is the data log from my vagcom:



I would love to here what everyone has to say. This is a 2008 tip s-line with r8 reps, 18z, rs6 grill, H&R coilovers, 034 rear sway bar and end links, led conversion, and I am sure there is plenty I have forgotten.
Sorry for the long winded post, but I appreciate all the help!

[Okedokey]

DV needs replacement probably.

[kstaack]

I replaced it about two months ago before the tune


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[Okedokey]

Then you have a leak elsewhere, need to used some soapy water to detect where it is coming from possible.

[adam044]

Problem with the tune... talk to the tuner, simple.

Should be boosting around 18psi.

[Okedokey]

Unless there is a leak of course. Given there is a whistling noise, id back that idea.

[kstaack]

I do not think there is anything wrong with the tune. It peaked at a specified boost pressure of 2440 mbar


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