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Owner: Diesel_Dave
White Whale: 2007 Dodge Ram 2500 ST Quad Cab 2wd, short bed
Displacement: 6.7 L
Fuel type: diesel
Transmission: manual
Curb weight: 6365 lbs
Coefficient of drag: 0.528
Frontal area: 35.1 sq.ft.
Instrumentation:
Description: The EPA does not publish official fuel mileage data for this vehicle, therefore I have used the Edmunds.com road test data as well as Intellichoice.com data.

Transmission is a Getrag G-56 6-speed manual. Rear end gearing is stock (3.73).

Tires are 265/70/17 Scorpion Pirelli STRa, E load rating (the ones that came on it)

Rated payload capacity is 2,635 lbs.
Rated towing capacity is 13,635 lbs.
Build Thread:
Current Mods: Removed diesel particulate filter (DPF)
Removed diesel oxidation catalyst (DOC)
Removed NOx adsorber
Removed EGR system
Removed intake throttle plate
Re-routed CCV vent to atmosphere
Smarty Jr tuner: fuel economy tune, most advanced timing
Upper grille block
Lower grille block
Tires at 75 psi (max sidewall is 80 psi)
Using block heater to pre-warm (750W)
Dual 150W oil pan heaters
Tonneau cover
Winter AC compressor disconnect
Engine oil: Amsoil Series 3000 Synthetic 5W-30 HDD
Differential oil: Amsoil Severe Gear Synthetic Extreme Pressure Gear Lube 75W-90
Tranny fluid: Castrol Transmax ATF+4 Full Synthetic
Engine blanket & insulation
Homemade ram cold air intake
Front belly pan (under engine compartment)
Fog light hole cover
Kill switch
Disconnected intake grid heater
Schaeffer's Diesel Treat 2000
9-inch side skirts

Driving mods:
Pulse & glide
Engine off coasting
Generally keeping it under 55mph (1,670 rpm)
Timing lights
Shifting as low as possible
Route planning

Planned Mods: Likely mods:
Smooth wheel covers
2000 W circulating heater
Tranny, differential heaters
Full belly pan
Exhaust manifold & turbo insulation
Defrost AC disable relay

Thinking about:
200 F thermostat
Alternator disable
Swap to 3.42 rear end gearing

Less likely, but maybe someday:
Turbo swap
Aerodynamic bed cap
Fender skirts
Official Fuel Economy Ratings
EPA city 12 mpg(US)
EPA highway 17 mpg(US)
EPA combined 14.5 mpg(US)

Actual Fuel Economy Performance
Lifetime 34.77 mpg(US)
Last 3 tanks 38.31 mpg(US)
90 days 37.68 mpg(US)
View Fuel Log
Last updated: Mar 15, 2014

(Created: 2011-05-19 11:20:05 / Modified: 2014-04-10 15:38:38)


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