[SeanWRT]

Thank you OP. Been waiting to see this for long time. Your number looks super legit, or even a little bit lower if 400lb*ft in torque is any indication, which is pretty much stock number on a dynojet we've been seeing. If there is a benchmark number to compare yours to, probably you will do it justice better.

From earlier conversation, I know you have a bigger IC installed as well. Please confirm.

My setup would be close to yours. Differences are my cat is a slightly more restrictive 300 cell but I have a new turbo inlet pipe which corrects BMW's mistake mating PWG inlet pipe to the EWG turbo compressor wheel inlet which is 20% larger in dia or 44% in cross area (see below pics borrowed). This is not going to make higher boost but more flow at any rpm instead, in other words, turbo will rev less hard at any given boost target and thus pick up a few efficiency it is lacking. Whatever difference that'll make to the peak power though.

My build would be much more powerful with a custom Jb4 setting, but I have no interest in maxing out anything. I want power as much out of efficiency as possible, hence all the supporting FBO stuff on the mild Dinan Stage One.

I will do a comparison dyno on dynojet involving:
1) Stock m2, though not my car unfortunately
2) FBO m2 on stock tune (Dinantronics bypass)
3) FBO m2 on Dinantronics Stage One
4) Stock m4
No PI, No meth, No E blend, 93AKI(98RON) only.

I'll see how I like my car with those stuff and decide when/if to jump into bigger turbo.