C15 MXS heavy haul advice

@superhauler might have some suggestions. To me boost looks a little low.

 

I am NOT a heavy haul. HOWEVER I have grossed 130000 plus with containers. That should be plenty.

Your numbers on the air intake restriction at 5 is BEAUTIFUL. As long that dial and yellow column does not pull too much more than say 10 or more into the yellow zone towards the top range you are good. If you get towards 7 on your air restriction, consider a new filter as required until your engine can breathe at 3 to 5 again.

Mr PYRO on the upgrade at 1000 tells me you understand how to pull it without abusing the engine. It proves to me you know how to put the engine into a certain sweet spot for the pull upgrade with that weight and it will get to the top without too much fuss trouble or problems in time.

HOWEVER if you start seeing Mr Pyro say 1250 and above, you need to back off it, you CAN for a few minutes take a 1400 or so thermal load if you must. But do not make a habit of it.

I worry about you feeding the turbo. Are you trying to pre-boost it or make it spool up before you really need it? I imagine you attaching a fast RPM electric motor to the Turbo's wheel and spool it faster at idle before you press down the fuel pedal when you do, the electric motor should disengage and your turbo should freely boost having already reached a goodly amount of RPM.

That last paragraph is just a imaginary on my part. I don't understand what precisely you mean about fake boost on a turbo. All turbos I understand will boost to a certain amount when you get to that point on the engine because it's exhaust driven.

What I think you might benefit from is actually superchargers. But I don't know of anything or anyone in heavy big trucks running those.

These are just my basic question for now. Depending on how you teach me about the details of your turbo issue we might talk more.

 

Your boost does seem a little low. Also your pyro is a little high. This tells me you should check the air to air and everything over good . Pressure test the whole system.
Other then that the rest seems fine.

 

I ran a 2006.5 NXS C-15 for almost two years up to 137,800 lbs with Super-B trains. 3.73 rears, 18-speed, 46k rears, 550hp/1850lbft.

You pyro temps seem about right for that weight (700-900 is "normal" for pulling heavy with all the N/M/BXS CATs I've driven). Boost is is a touch low (mine ran up to 45 under full fuel). Fuel mileage for me was between 3-4 mpg on summer fuel (I could get 6.4 at 80,000 gross).

Sounds like she is running just fine.

 

I agree with what @swaan said.

 

Advance the timing a little and up the fuel.....

CATERPILLAR Tuning & Performance | 3126 Highway Truck

 

That truck is like brand new. You've got some low hours and mileage for an 05.