My LNC4 has a GAMI-equipped TSIO-550E showing a 50F temp difference between left TIT and right TIT probes when cruising LOP and I am trying to determine if this is normal and how to go about leaning.

 

On the ramp at 1,100 RPM, T2 is 100F higher than T1. At ROP cruise , TITs are within 10F.

 

Which TIT should I use to set fuel flow for LOP cruise? If I set to keep T2 at 1600F, T1 reads 1550F, which seems too low/high, respectively for extended cross country legs.

 

Other settings: 2450 RPM, 29.5” MP, 16.8GPH, EGT1-5 are 1540-1560F, EGT6 is 1500F. Less than 150 hours since top end, new TIT probes, GAMI lean test showed all cylinders peak within 0.2GPH of each other at around 18.2GPH. The turbos have about 1,000 hrs since rebuild, some minor impeller digestion damage but making good boost.

 

Any suggestions or advice would be greatly appreciated.

 

Pierre Bogacz

LIV N462WW