Should be as those cars could produce 430 to 450 with one pulley and a good remap.

I've been working on a bit of 3.0t development myself, since I just bought a 2013 s4.  With a pulley and a tune, they don't produce a bunch more power than stock until after 5000 rpm, not quite like a turbo charged engine.  That's around the point that the stock calibration starts bleeding boost.

I have some vcds logging templates that I could upload to share, if that would help.

After using being used to ME7Logger, VCDS is crippling in comparison.   10 vars per sample @ 6 frames per second makes me sad.  If anyone is willing to share a better UDS logger, or is willing to help develop one, I'm all ears.

That would be helpful; also post up some of your logs for comparison (I will do the same).
Just curious: what kind of boost is the stock (and a stage 1 and stage 2 single) running?

Please upload (or email; info@kraftwerkturbo.com).

No, I don't.

4000 rpm, 250hp to 290hp. 16% power gain.
I'd say 16% is fairly noticeable and that's through the rev range.
Also, your statement about the stock tune bleeding after 5k is wrong too, it bleeds everywhere.

I did not cherry pick a run, there are cars that have ~20% gains.

My point being with Stage 2 there is a very noticeable difference already from 2500 rpm.

here's a few