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what's a safe range to keep the EGT in on a 4G63T and a VQ35DE?
If you could add the turbo' spec' as the turbines have temperature limits - they also depend on how long the turbine is subject to the temperature, so if you also give the use?
Oh, stock exhaust valves?
I couldn’t say exactly the 4g63 but for the Nissan temp limits for the OEM valves tend to be in the mid 800’s when measured in the primary just after the exhaust port. It’s worth noting that turbine temp is often hotter than egt due to the convergence of all the exhaust gases so it depends if you’re concerned with the max valve/seat temps or turbine temp limits