Hells YEAH!  I can do the logs without MAF no problem.  Without the MAF I can only get to 15psi (gage)  before TC kicks in.  I will have some logs for you later on this evening.  I am tempted to toss in the MBC and run a couple logs that way also to see if there is any difference.  Something just doesnt seem right.  I swear it is spooling like it was on the 4cyl.  

VAG-COM logs ok until I figure out ME7 logger?

Yes, vag com logs are okay, just dont do more than two blocks at a time.  Take caution when doing speed density (no MAF) as you are operating an a more basic system and much less safeguards and headroom in place.  Don't be afraid to set your krkte a little fat and have STFTs pulling fuel so in the event of an o2 sensor failure you would lock in rich.  If basic driveability is ok without cutting out and then also part throttle up to about 60% is ok and your AFRs are ok and you have also checked that short term fuel trims (STFTs) are functioning then try and get a pull in 3rd or 4th at 100% WOT.  dont worry about reving it out.  just get a good clean run or two in different gears below boost onset, through boost peak and then roll off.  Obviously if everything is looking ok and you want to get a full log then go for it but really the whole fats window doesnt matter.  running clean and hard is unmistakable.

The key on actual runs here is to have you flat on the gas and actually possibly bog the car a little.  We want to see at WOT where the magic is happening and also where its possibly doing something weird as your VTG is transitioning.  Go ahead and leave all data in the log files, its all informative, even idle.

Just dont get over zealous.  You will blow up the car with what that turbo can do if there are wastegate or fuel issues.  I am not sure what pump you are on and all that, just DO NOT go lean on boost no matter what.

VCDS log.  Throttle cut at 7psi and was kinda slow to build boost.

...and a ecux log file.  I am still figuring the program out.

I will look it over and see what we got, I just went and tested my car on your exact file with it setup for my bosch maf and it was one of the best files my car has ever seen in regards to driveability.  I also held 25 psi smoothly.

brb.

on a related note one of my diesel buddies is right here in my shop and he said you need to look into a Fleece Performance standalone VTG controler for the Holset.  You can control based off many variables

Been there done that.  I called them and they said it runs off of the Can-Bus or whatever in that particular truck.  It was 2 years ago though, when I first got involved with this turbo.  Guy said they might come out with one that can be used in more applications, but I never heard anything back.  

It would be nice to have the thing wide open when crusing to lower EGT and backpressure.

CSV of ECUX log

Ok, reviewed the logs and at least we have a start. 

So first and foremost the car is cutting when the VTG activates via the wastegate spring.  You said the gate is a 7psi one right?  It is building up to 7 psi very soon and then when it transitions it falls on its face as the car cant keep spooling it around 3k, we need it to stay like a smaller turbine for longer. as the turbo "turns into a bigger turbine" for all intensive purposes.  You can see where the wastegate is dropping off as it thinks the spool is happening but then the spool rate falls off as the turbine opens up more.  I am going to raise the PID duty cycle % back up until you are more in the 5-6 rpm range.  I would be interesting to see what happens with the VTG disabled.

Here is the first revision, going to try holding the n75 shut for longer, this may over boost up high if we can even get you there yet.

I also attached the 4_runs_compare of yours (3) and last in there a log of my car on your file from this evening.  As you can see my car is spooling faster yet in theory yours should spool faster, yet at the start yours is actually out spooling it, way down low so the VTG in the closed position is obviously capable of the quick spool.  The VTG opening is messing things up like I suspected it would.  It needs to turn into a big turbo much later and possibly at more like 15-18 psi.