bad milage

[p-pump f450]

Im getting 12-15 mpg my truck is a 05 f450 2wd 430 gears 24 valve with p-pump motor has scheid lighting turbo 57 mm 64 turbin side scheid injectors 6x9 100 hp 84 lines 24 valve street cam d valves 181s they also did my pump they cut plate flush and pump flows 260cc slid back to 430cc full forward 4000gov springs timming 17 im running 2000 rpm at 60 mph truck runs great just bad milage thanks for any help

 

[GOT-Torque]

what does it weigh?

 

[p-pump f450]

8800-9000lbs

 

[Chevycummins]

Auto or manual? Might try a different gear ratio or a gear vendors?
I get 14-17 out of mine depending if I am towing or just driving at 17-1800 rpms/ 70 mph, and I got quite a bit more fuel than than you too.

 

[p-pump f450]

its a 5r110 ats 5 star convertor low stall might put 373s in but evan at 55-60 mph 12-14 mpg at 1900-2000 rpm even with plate all the way back or slid ahead seems to be same

 

[p-pump f450]

also called gear venders they said cant tow with it would be in double overdrive and mess up trans and there unit

 

[Chevycummins]

They say that to everyone. A member on here I believe tows with one

 

[Charger]

1,750 to 1800 rpm at 60mph is the sweet spot on my dually

 

[Turbonetics TQ]

My fuel economy was drastically increased when I adjusted the AFC a little on the lazy and less smoky side also added a heavy spring. 15MPG is not too bad for the weight.