I have been driving around with My stage II tuned N54 for over a year , It was a Tune from a local tuner with Dyno.
Somewhere this month i am going to recieve some new turbo units, so i thought it was a good time to check out different tuning options.

My car has a Forge intercooler, Active Autowerk ********* and a ER chargepipe with Tial BOV.
Also the car Still has BMW Waste gate rattle fix, gving some "lag" because it keeps the waste gates open at idle.

I first Logged some 3 WOT pulls with MHD flasher monitor module from the local tuner file.

http://datazap.me/u/odanbe/odanbe-3t...og=0&data=4-20

then I flashed the car back to Stock , with the file provided by MHD Flasher

http://datazap.me/u/odanbe/335imhdoe...og=0&data=4-22

And then I flashed the stage II map (wedge?) i bought from MHD flasher

http://datazap.me/u/odanbe/mhd-flash...og=0&data=4-22

I few things i noticed right on :
The stage II MHD map makes more power. Because of the higher boost
BUT
The Local Ecu tuner file is/was much more responsive. Also the local ECU tuner file boost quicker. And post shift with the MHD map you really have to keep it above 4000 rpm post shift, or it falls a bit deat losing boost...

How does this come ? I want to understand.
It can't be the hardware because all was done within a timeframe of maybe 2 hours.
I like my local tuner file more because it is more responsive. I would love the Power gain from the MHD stage II map ( 17 psi) with the responsiveness of my Local ECU tune file ...
why is the MHD stage II file building boost slower with the same hardware.
With my old Ecu tuner file @3000 rpm it makes already 10 PSI. With MHD @3000 rpm it only makes 5.9 - 6 psi Boost. this is a noticable difference in Power delivery.
The car just feels slow and sluggisch below 4000 rpm.
It is like having a big single... without the big single Click here to enlarge

Anyone any thoughts on this ?