Can be a few items to check on the cx. There is a small filter screen on line going into the injector pump which can be clogged and cause poor performance. Another thing that can happen is the boost diaphragm can split but usually a tell tale sign of this is that the fuel tank will start to expand!As a matter of interest does or did anybody else run an older and newer generation Perkins side by side and how did the compare?
Have a 236T in the Landini and 1004 in the Case. Both are meant to be the same power but they certainly dont feel that way, both same hours.
Landini is an animal to pull even with 0.5t more weight and a clutch on its last legs and the Case has new rear tyres and very mute in comparison.
Just wondering is it the engine or more the drive train.