I have a question about my latest JJ1400:

The engine runs and starts OK however I cannot reach max RPM of 160,000. It reaches max 138,000. The EGT at idle is 550, at mid throttle like 650, above 120,000 RPM egt reaches suddenly upto 800 C. I am thinking: since the ECU is set at 800 C max temp this maybe the reason for not reaching max RPM. Shall I increase this setting to reach higher RPM's or shall I assume there is a mechanical problem with the turbine?. The balance of teh turbine is almost perfect...Another reason might be smaller diameter of the NEW exhaust nozzle creating higher temps at higher RPM's. Are such temps acceptable?.

I appreciate comments.

Murat