i believe the peak operating range is like 1,200-1,250* this is the safe area, you can go to 1300* but that's the edge! any thing over 1,400 and the turbine vanes start to get soft
the higer you can get your EGT the quicker spool you will have on your turbo but you also have to stay withen the parameters of your injectors (they make high flow injectors for a reason) From what i've learned running as hot as you can with out making smoke results in the best MPG and power over long periods (pulling a load up hill for example)
Diesels were made to work, they are over enginered and limited on their RPMs so that they are reliable for a long time. On that note letting a diesel run in the colder range may cause carbon load-up also know as wet-stacking which can plug up injectors and hurt milage/power.
I'm gonna definatly have to get a pyro guage soon cause the turbo is spooling up imedietly (the tires are breaking loose anyway) and producing tons of black smoke on my extreme tune. Thanks for the info James.
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