Originally Posted by
Clearedtoreenter
Maybe increasing MP reduces TIT and EGT?
In certain circumstances, it can, but it won't be by much. Increasing MP results in higher combustion temps and a slightly faster flame front speed. The faster flame front results in an earlier thetaPP and lower EGT/TIT, but again, it's not much--might even be "not enough to notice" since the temperature of combustion went up slightly. Again, this is not related to engine longevity.