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2005 Ford F-250 Super Duty - Diablo Loco

A Model of 6.0L Performance and Reliability

Jun 23, 2014
Photographers: Monica Gonderman
If you’ve been a fan of diesel for any period of time, you know it’s fair to say the 6.0L Power Stroke’s reputation precedes it. Jason Loeliger of Walnut Creek, California, knows this all too well. As an ASE-certified Master Technician and Ford Diesel Engine Master, Jason has spent more than a decade servicing diesel trucks, working at both a local Ford dealership and, most recently, his own shop. However, knowing the ins and outs of the 6.0L didn’t turn Jason away. In fact, it had quite the opposite effect, and in 2012 he purchased a clean 2005 Ford F-250 Super Duty crew-cab four-wheel drive and quickly set to work making it his own.
The first area that needed addressing was reliability, since the truck was purchased with 90,000 miles and a fully plugged oil cooler. For this, he turned to the 6.0L experts at Bullet Proof Diesel. Jason installed nearly the entire Bullet Proof catalog, which included a heavy-duty oil cooler, EGR cooler, water pump, and 58-volt six-phase FICM. With the heads off, a set of ARP head studs and new factory gaskets were installed to ensure cylinder pressure stays where it belongs.
Photo 2/14   |   Popping the hood reveals a rather unassuming 6.0L Power Stroke V-8 (above), but it’s what’s not seen that makes all the difference. A set of Full Force Diesel 190cc injectors fitted with 30-percent-over nozzles is fed by a regulated-return fuel system from Driven Diesel. Air is provided by way of a modified PowerMax turbocharger, and cylinder pressure is contained by a set of ARP head studs that clamp the heads to the block. The engine also sports the full Bullet Proof Diesel catalog, including the company’s 58-volt six-phase FICM, heavy-duty oil cooler, EGR cooler, and water pump. Spent exhaust gases exit through a 4-inch turbo-back MBRP exhaust. On race day, the truck is outfitted with this custom tailpipe extension, which directs exhaust up and away from the dragstrip’s timing lights.
With engine reliability handled, it was time to crank up the power. Fuel is provided by a set of Full Force Diesel 190cc injectors, which are fitted with 30-percent-over nozzles. A regulated-return fuel system from Driven Diesel Performance ensures each injector has adequate fuel pressure and volume at all times, while a FASS 165-gph lift pump keeps the fuel flowing. To keep up with airflow demands, a modified Garrett PowerMax turbo from Turbo Re-Source was bolted on. Feeding the PowerMax is an intake system from S&B Filters and, once compressed, the air is routed through a Banks Techni-Cooler charge-air cooler before entering the engine. Exhaust gases exit through a 4-inch turbo-back exhaust. Tying it all together is tuning from Gearhead Automotive Performance via an SCT programmer.
Turning his attention to the exterior, Jason began by installing a 5-inch ReadyLift radius-arm lift kit and Fox Pro Series 2.0-inch shocks. The rear end got a set of Firestone RideRite airbags to help with heavy loads, and a fiberglass tonneau cover to keep the bed’s contents secure. Traction is provided by a set of 35x12.5R17 Toyo Open Country M/T tires, which are mounted to 17x9-inch Method wheels. Climbing into the truck is made easier by a pair of Bestop PowerBoard electric steps, and lighting the night is a pair of LED lightbars from LED Warehouse. Rounding out the truck’s devilish good looks is a custom vinyl wrap that covers the boring work-truck-white factory paintjob.
At the end of the day, Jason’s incredible knowledge and style sense have left him with a go-anywhere, do-anything truck that’s just as at home on the dragstrip or sled pull arena as the kid’s carpool. This truck knocks down 20 mpg during the week and 13-second quarter-mile passes on the weekend -- and does it all with class.
Photo 6/14   |   Jason took home the trophy in the Work Stock sled pull class when he bested everyone else with a 254-foot pull under the lights at the 2014 NHRDA season opener in Bakersfield, California. Not only is this truck Jason Loeliger’s daily driver, but it also hits the track from time to time. So far, the Ford has clicked off a best quarter-mile time of 13.3 seconds at 103 mph.
Photo 13/14   |   For Jason, having a plain white ’05 F-250 was simply too boring. After he hopped up the engine and jacked up the suspension, the truck was covered in flat gray vinyl by Factory Wraps in Antioch, California, completing the transformation from average to awesome.

2005 Ford F-250 Super Duty
Owner: Jason Loeliger
Hometown: Walnut Creek, California
Odometer: 113,000 miles
Engine: 6.0L Power Stroke V-8
Aspiration: Garrett PowerMax reworked by Turbo Re-Source with a 63.4mm billet compressor
Fueling: Full Force Diesel 190cc injectors, Driven Diesel regulated-return kit, FASS 165-gph lift pump
Horsepower: 600 hp (est.)
Torque: 1,100 lb-ft (est.)
Transmission: 5R110 TorqShift five-speed automatic
Tires: 35x12.5R17 Toyo Open Country M/T
Wheels: 17x9-inch Method “The Standard”
Suspension: ReadyLift 5-inch radius-arm kit
Shocks: Fox Racing 2.0-inch reservoir shocks
Fun Fact: Jason and partner Mark Fuenzalida own Devil Mountain Diesel, a full-service repair shop. It was named as such by Jason’s wife, due to their close proximity to California’s Mt. Diablo State Park.
Photo 14/14   |   Traction is provided by a set of 35x12.5R17 Toyo Open country M/T tires, which are mounted to 17x9-inch Method wheels.

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