Differences in N14's...

I have never seen an N14 coming from the factory with a 460 rating being able to be up-ed to 525 and never ever up-ed to 2050 torque. 525 had two piece pistons.
The high torque ratings were 1850. We had a fleet that did real heavy hauling over mountains they bought the early 460s to get the best cam for the Jake's, they derated them to 430 and they lived for well over 1.5 million before being sold. They did get an overhaul at 750,000.
Red tops is a valve cover option nothing else.
A select was like a base ECM, Cummins first try, the Plus was the second version and had better memory and a few more inputs like the intake temp sender

 

Does anyone know the difference of a N14 ESP engine?

 

ESP is for Electronic Smart Power. It was an option for the engine to have two different horsepower and torque curves. Electronically the engine would monitor power output and engine loading and automatically switch between a low and high power output as needed.

 

In Finland we had 425, 475 and 525, only difference was the software. 530 had different injectors they said but I'n not sure. When I ordered a PP box for one 530 they said that CPL says it's a 525 ?

 

According to Pittsburgh Power, all Celect Plus engines were Red Top. Celect Engines were all black. The differences of the engines is the CPL (Cummins Parts List) number, different cams, injectors and ECM programming. I have a '96 Celect Plus 460, at home to be rebuilt, with a 2025 CPL. It can easily be turned up to 525, however, I'll probably leave it a 460 and just run a Power Box, if I want more.
BTW, all Red Tops run two piece pistons. The N14 mechanical, with STEP Timing ran one piece pistons, like my old Big Cam III 400.

 

I worked on a fleet of the early celects and they were 460.s derated to 430 and everyone had a red valve cover.They all had one piece pistons. It was an option and the old steel covers had a problem of leaking. The early Celect plus we had to retrofit the air intake temp sensor and reprogram them.