Im rather curious where everyone is coming up with combustion temps being higher with egr defeated. Diesels operate a little different than gasoline engines. It would make more sense that combustion temperature would drop. When a diesel is lacking oxygen, then exhaust temps rise. This is why in trucks its so common to upgrade to a bigger turbo to keep the temps in check. So by defeating the EGR and not introducing the oxygen deficient air into the intake of the head, it would seem that you would have more oxygen available for combustion, resulting in more power, better fuel economy, and a LOWER combustion temperature. Not that any of these would be huge differences on such a small motor.
Another thing is egr loves to gunk up and choke the intake tract over time............