Is that 1100 degrees measured pre-turbo or post-turbo? In instrumented testing* I've seen a pretty consistent 200 degree difference under load. If that's post-turbo I'd say you should dial your fuel back a little. If it's pre-turbo you still have a little room to go before you risk melting your turbine wheel.

It's my understanding (I could be way off here) that the reason pulling trucks and drag race diesels smoke so much is that they intentionally run so much excess fuel that it cools the EGT's, sacrificing some power to keep the engine alive. I know top fuel dragsters do this. Of course, I would never advocate doing that on the street. Diesels still have an image problem in this country and major smoke shows, while pleasing to some of us, don't help with that image problem.

*400 or four and a quarter N-series Cummins in a cooling test I did at my old job.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.