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  • A 647 HP 6.7L Power Stroke Powered 2012 Ford F-250 - The Gray Ghost

A 647 HP 6.7L Power Stroke Powered 2012 Ford F-250 - The Gray Ghost

Exploring the 6.7L Power Stroke as a Performance Platform

Jason Sands
Jun 10, 2015
Photographers: Jason Sands
It’s pretty much official: Ford has hit a home run with its new 6.7L diesel-powered trucks. Offering surprising performance in stock form, the new engine’s reliability has also emboldened those willing to pump up the ponies by a few hundred extra horsepower. Dorian Reyna’s ’12 Ford F-250, which at first glance might be mistaken for just another tuner-equipped show truck, is a perfect example of just what a clean 6.7L can do.
Photo 2/15   |   Custom 2012 Ford F 250 Rear Three Quarter
You see, Dorian owns Power Stroke Enginuities in Houston, Texas, a shop that specializes in Ford performance and maintenance. To showcase just how capable the new platforms are, he started building a ’12 for both looks and performance. The truck still had to be able to be driven daily and tow, as he needed a rig to haul his Power Stroke–powered F-100 project.
"Dorian Reyna’s ’12 Ford F-250, which at first glance might be mistaken for just another tuner-equipped show truck, is a perfect example of just what a clean 6.7L can do."
Modifications began in the cosmetic department, where Dorian upgraded the Ford’s wheels and tires and installed a suspension lift. The 6-inch rise is courtesy of Precision Metal Fab, including a Stage 3 track bar and long-arm four-link kit to keep all the suspension geometry where it should be. The ride was also improved with the installation of Fox shocks and Airlift airbags. Rolling stock was upsized to 22-inch American Force wheels with 325/50R22 Trail Grappler tires from Nitto.
Photo 3/15   |   Dorian’s F-250’s modified stance is made possible thanks to a 6-inch lift from Precision Metal Fab. The lift kit also features extra-long link bars, a Stage 3 track bar, and dual BDS steering stabilizers.
While the ’12 Fords boast an impressive 400 hp from the factory (about 350 hp at the wheels), programming can add another 150 hp, bringing the total up to about 500 rear-wheel horses. But Dorian didn’t stop there. The stock turbocharger’s airflow is limited, so a larger, 66mm S300 turbo from BorgWarner was installed with a kit from Maryland Diesel Performance. The larger turbo is fed by an S&B intake, while MPD hot- and cold-side piping and a No Limit Fabrication intercooler keep the charge cool. Fueling also received upgrades via dual K16 injection pumps to make sure rail pressure keeps solid. Extra fuel requires extra support, and a Fuelab 200-gph lift pump satisfies that need.
Photo 4/15   |   The 6.7L engine in Dorian’s ’12 Ford F-250 is capable of some pretty impressive power numbers, considering its limited but well-thought-out modifications. The most noticeable change is the single turbocharger setup from Maryland Diesel Performance, which was color-matched to the truck and is largely responsible for the rig’s 647 hp and 1,012 lb-ft of torque.
Since Dorian wanted to keep the truck as smoke-free as he could, the stock injectors and nozzles weren’t upgraded. Another surprise is the stock automatic transmission, which hasn’t given Dorian any grief. The last piece of the puzzle was clean, smoke-free tuning from Gearhead Automotive Performance, which helped the 6.7L achieve its impressive power levels.
With a dyno-proven 647 hp and 1,012 lb-ft of torque, Dorian’s ’12 F-250 is one heck of a daily driver. Its EGT is a safe 1,300 degrees during a full-throttle blast, along with a mellow 44 psi of boost. Dorian drives the truck everywhere and has no issues towing across the country.
Photo 5/15   |   Stock 6.7L turbochargers on ’11 to ’14 Super Duty Fords are known to be problematic and horsepower-limited, so a 66mm S300 turbo from BorgWarner now provides airflow to the engine in Dorian’s F-250. At 44 psi max boost, the new ’charger’s compressor speeds are relatively moderate.
Fast Facts:
Year/Make/Model: 2012 Ford F-250
Owner: Dorian Reyna
Hometown: Houston, Texas
Odometer: 50,267 miles
Engine: 6.7L Power Stroke V-8
Fuel: Truck Source Diesel sump, Fuelab 200-gph lift pump, H&S Dual Fueler Kit, and Gearhead Automotive Tuning
Air: S&B intake, Maryland Performance Diesel S366 turbocharger kit (66/73/0.91 T4), No Limit Fabrication intercooler, MPD hot- and cold-side piping
Exhaust: 4-inch downpipe and Flo-Pro 5-inch exhaust with a 7-inch tip
Transmission: Stock
Horsepower: 647 hp
Torque: 1,012 lb-ft
Tires: 325/50R22 Nitto Trail Grappler M/T
Wheels: 22x12 American Force Independence SS
Suspension: 6-inch Precision Metal Fab lift, Stage 3 track bar, long-arm four-link kit, Fox 2.0 shocks, and Airlift airbags
Axles: Stock with 3.55:1 gears
Interior: Auto Meter Cobalt boost and pyrometer gauges
Fun Fact: Dorian passed us in his ride during a rainstorm just outside of Durham, North Carolina, on his way to Rudy’s Truck Jam, so we can vouch that he drives his rig anywhere and everywhere.
Photo 12/15   |   Some items may look like they came from the factory, but they didn’t. This intercooler from No Limit Fabrication installs in the stock location yet has much greater flow potential than the stock air-to-water intercooler.



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