Where is the EGT temp? Pre or post turbo? Last I read automatics have seconds to live when above 250degrees. Under 200 degrees is preferred. If your EGT is preturbo your running cool. Keep the EGT under 1200deg preturbo. Technically your engine should have no problem with 1200deg preturbo. However, there is manufacturing differences from gauge to gauge. Did you monitor the back 3 cylinders vs the front 3 cylinders? I prefer not to run my equipment at 100%. Keeping it under 1200deg preturbo would be considered safe.