Piggy backs do not work on the 3. The ECU can not be fooled. The ONLY thing that has proven to work so far is the f10x for stand alone fuel management. So non of the things u mentioned work. Then the f10x is limited in what it can do because of MAF issues after about 12-14 psi. So... E8 it is. In a mean time I'll be trying to hit 600+ nxt week.
Click on my sig... "Killer 3... it will take u to my page where I have the full list.
Also, how loud is the divorced waste gate vent to air? Have any sound clips?
Edit: Ah, I read your cardomain page and it reads that you vent the wastegate to exhaust, but what is that pipe under your car going to atmosphere?
It's an exhaust electronic cut out. ;-)
Thanks for the compliments.