wierd how the torque doesn't peak until 4k RPM on the 11PSI curve, see what I mean about the header being inefficient???
If their most aggressive boost level is 11PSI, then they're using the wrong turbo. They should be using a straight T3 (or maybe even smaller) and use the extra money to upgrade to a ball bearing turbo and have a much more broad torque curve. That and they could benefit from more experienced ECU tuning. This hit and miss stuff isn't exactly confidence inspiring. It's a big part of why they make more peak torque on the 7PSI curve than the 11PSI curve. My guess is that the dip on the 11PSI curve isn't ignition related, I bet it's a knock from the fuel curve leaning out.
just my $.02
There's potential to really own the BMW market, they just need to put together a better package. If I were them, I'd get a more efficient header, smaller intercooler (11PSI doesn't require much intercooling and large intercoolers contribute hugely to boost lag) smaller ball bearing turbo, a knock sensing ignition retard system and get a more experienced tuner to dyno tune the ECU.