Fuel Mileage on MXS C15 cat

Good luck with mpg. It will fall rapidly. When I bought my t600 with mbn c-15 it was 5.49 mpg as of 2011. Right now it is 5.19 mpg. It also has pto blower, hauling the same gross weight like yours, and drive in to natural gas wells mountains of PA. Pulls excellent in hills/mountains with eaton 3.70 rear, eaton 10 sp manual, and 500 hp 1850lb/ft. Yours has 18 sp and 3.36 rears, I think you will have better mpg than mine for now on.

 

My truck W900 MXS 475hp 13speed 325 rears on LP22.5 does good on hwy but local work sucks I'm getting 3mpg but over the road it gets in the 7s and my truck don't pull good at all hills kill me

 

Bayou is that an App?

 

It's available on computers letstruck.com
Can downloaded as an iPhone app.

 

And it's free...it also tracks my fuel in each state I love it!!

 

The Acert 475Hp and higher Hp engines with an 1850 torque output rating require two 10" diameter mufflers to reduce exhaust restrictions through the catalytic converters or a single muffler that is 14" in diameter. By modifying the dual muffler exhaust to use only one of the existing mufflers is going to cause major exhaust back pressure issues at full power output of the engine. I'm assuming that you have the muffler mounted under the truck. Remove it or the only muffler that I've seen that you can replace it with is a Pittsburgh Power muffler designed for the 2002 and earlier KW W900L AeroCab sleeper trucks. You need to get rid of the catalytic converter muffler no matter what you do, otherwise fuel mileage will suffer greatly with the current set up.

The twin turbos kills a lot of exhaust sound, so running straight pipes isn't as much of an issue with noise as the older trucks were. They still have a fairly noisy jake on straight pipes though.

I've got a customer in Texas with a modified MBN that does this type of work that is getting great fuel mileage pulling a pneumatic trailer, but he does have an APU for his waiting to unload at the well head.

 

If Any ones interested I've found another I phone app that does fuel and maintenance / repairs. I think its a good idea to keep track of running costs.

 

Kurt
I'm sure you have heard that in ozz the NXS in the new cat trucks are coming out with twin dpf, that has to choke them up, there are a few getting around here now but I haven't realy heard any fuel economy feedback about them.
They are more of a catalytic muffler than dpf I believe as there is no fuel dose to burn,
Looking into my crystal ball I see people removing them in the future.😜