Sadly 230bhp on beiges won't happen. Personally I would highly recommend siemens deka, vxr injectors are okay to around 240bhp on a cvh due to the poor BSFC.

As for the 4bar map sensor, they are supplied as an optional extra with the OFAM, you can get it as an upgrade too.

Your engine spec seems good, and capable of good power. Who is tuning this for you? I would have a chat with them when they start mapping, they can gradually (and safely) increase the boost whilst making sure there is no det.

What kind of boost control do you have?

Rob,