Pete 379 with Cat C-15 mpg?

ok so you added 1 -1.5 which equals what now ?

 

That's a big difference, I wonder what he ACTUALLY increased.

 

went from low to mid 5's to 6+, as high as 6.75 pulling open deck freight. make me happy and pulls great!!!

 

As far as mufflers... areo turbine muffles are pretty slick...

I got dual pipes on my pickup truck.. with dual mufflers... if you put your hand on the exhaust on one pipe forcing the exhaust out the other side it will actually draw your hand in.. the mufflers design create suction and help draw out the exhaust.

I like the sound of them on my semi truck.. i seem to have extra firewall noise. Wondering if i need to look at exhaust manifolds and turbo this next year.

The muffler got me maybe a tenth.. i run usually 5.8-6 running flatbed. Which as i am learning is not bad.

 

Sounds like aero turbine has good mufflers, should help get out some heat...

 

Acert's like low rpm shifts 1300 rpm anything after that is just waisting fuel.... i get 6.8 mpg 90 day avg. 18spd/3:36 on 24.5 tires and gross avg 100,000 lbs and yes its all in a 2007 379 its all in the way you drive it.... you can do all the stuff the others are writing about for better MPG and it helps but the base MPG starts with how you run the engine first. and Don't change the ECM parameters just put a Pittsburg Power Box in.

And its against the law to delete emission parameters!


Caterpillar make Bulldozer engines not Nascar engines....

Good Luck

 

maybe you haventread the news but the PP power box is no longer for sale because it too is not epa legal.... and these boxes are not idiot proof, its a duration timming box, must be very careful not to melt the engine down, ecm tunes are a safer bet, they dont just dump a tonne of fuel in the cylinders

 

My 07 MXS 13 325 rears on LP 22.5s at 64mph 1,350rpm's grossing 70,000lbs on flat ground gets 5.8 and I'll put $1,000 on the line says you couldn't drive this truck at 100,k gross and get better than 5mpg I was 90,k gross two weeks ago almost couldn't even run top gear and did 3.14 going from Houston to Memphis going 10/12/55 and that's a fact!!

 

I stand with you !

 

bayou, you notice he didn't say what speed he runs did he. lower that 64 down and watch what happens and try 12th direct at 55 mph and check that.
I ran a load of steel bars from erie,pa to charlotte,nc and got 7.5 running in 12th with 44,000 on did 55 the entire way though