Pulling behind other trucks

[Rawze]

(01-12-2017 )fargonaz Wrote:  79542557

Yours should have the CL10136 program in it.

quickserv says...



CPL: 3719

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Insite/Incal says that program is for Linehaul (highway) applications and reaches 450HP when you get to 1800 RPM, and it falls off again to 369HP at 2100 RPM.

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Looking in the program file itself reveals ...

345HP at 1100 RPM.
376HP as 1200 RPM.
439HP at 1400 RPM.
461HP at 1600 RPM.
450HP at 1800 RPM
368HP at 2100 RPM.

It actually peaks in HP 1650 or so rpm where it should.

Negatives ...
Like with many factory programs I have seen, the engine attempts to reach max torque by the time it gets to 1100 RPM, and this (opinion) is not good for an ignorant or abusive driver using the cruise all day and allowing it to lug. This tends to risk the liners long term, but is typical of red motor programming.

* Moderate fuel limiting is enforced, reducing the max fueling of the engine, even if it cannot achieve hp ratings to only about 70% of what the injectors can achieve. - This is also typical of fleet/highway programs, and (opinion) is a reason why a lot of cummins engines will only achieve about 70% of its HP rating on a dyno. The engine is quite often being starved of fuel on its upper end.

* (opinion) The fuel air ratio mappings (like most factory programs for the 2250/2350's, is set to over-fuel it at idle, and under-fuel it at max torque a bit. - Puffs of black smoke into that DPF can for those people who stomp the accelerator a lot, and burns a bit too lean, consuming extra SCR fluid usage at high torque. Typical of most factory red motor programs, nothing new.

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Considering the build date of this enigne, I hope like hell someone has updated the fuel pump and plungers too by now.