CM870 power issues

[Rawze]

(12-07-2022 )kamiar Wrote:  ...
I hear you, we run a lot of engines on this dyno and they all make the exact hp that they are supposed to, only these CM870 CPL 8018, boost is 32PSI full load, fuel flow i am not sure but i will look again and report here, btw the timing and metering actuators are replaced as well...

if you are jumping CPL or are running the wrong program for the engine vs. its injectors and other internal hardware.. it can cause some discrepancies too. There are different injectors with different programming requirements in these engines.. and running the wrong program for the hardware is a no-no that can lead to efficiency problems and other issues like incorrect fuel quantities to go along with this, etc.

Also, for the CM870's in particular.. some CPL's have different wedge settings on the cam.. so those programs specific to this need to match as well.

then there is the matter of "what truck" that program belongs to... just because it has the same CPL does not mean that a particular program is made for a certain model/make of truck. -= I.E.> a program meant for a prostar or cascadia .. even though it has the same exact CPL (engine hardware) .. will NOT BE COMPATIBLE with a W900 truck with its significantly larger CAC, piping, exhaust, etc. -= this is a mistake that i see a lot of people do and then complain that their fuel mileage has gone to s$it.

There are also programs that were written for emergency vehicle applications.. and not meant for a highway truck at all. -= all within the same CPL range as a highway truck. -= These programs are very hard on the engine overall, so installing one of these programs into a highway truck WILL SHORTEN ENGINE LIFE BY QUITE A BIT and eventually tear the engine up because the program is meant to abuse the engine and operate it in a cold state with full power and most of the settings are not meant for a truck that is going to be going down the road all day with it fully warmed up and heavily loaded.