Thats quite good, Yeung. With the split dump i wouldnt expect too much more. Have a chat with Burke or Menno to see what numbers they are getting and at what psi/afr's. I believe they are getting a touch more power (Burke around 210kw @ 19psi?, Menno around 220kw @ 21psi?)

18psi would be a good option for the 2.5 to maintain driveability and reliabilty, its all in the tune (afr's basically) and keeping them safe to avoid detonation. I would also say get some silicon bits in the engine bay if you dont already have them, and possibly bigger injectors might help with more power.

Either way, happy days now.