I know this thread is very old...I have my GIAC K04 H.O. file loaded in my MK5 these days because while running my original DM K04+ file, I had to rebuild my engine at 120k miles. The DM tune never beat my GIAC K04 1/4mi ET of 12.8s @ 112mph...and the rebuild is when I decided to switch back to GIAC. While the rebuild was happening, DM emailed me a newer K04+ version. I contacted them and they said this newer version is a closed loop tune and boost will now taper rather than target boost always being at maximum.
What I wanted to know is if your K04+ tune is open or closed loop...and whether or not DM sent you a closed loop following your original open loop tune.
If you did load that newer closed-loop K04+ version, could you tell me what you liked about it over the open-loop constant peak boost tune they originally came out with? I just haven't heard any reviews on this to date.
Been thinking of giving the newer closed loop tune a temporary tryout...although if it doesn't work well, I'll be out $100 to $120 for the loading of my stock file before I do the DM tryout and again for the return of the GIAC file...because DM is Dead and so there will be no support at getting it running.