All of that oxygen from the turbos and nitrous is necessary to keep up with the healthy fueling system. A custom-fabricated six-gallon fuel cell provides diesel to a FASS 150 lift pump. The clean fuel is then delivered to a Bosch P7100 injection pump built by Turbo Auto Diesel with 14mm plungers. The high-pressure fuel is delivered to the cylinders via Turbo Auto Diesel electrical discharge machined (EDM'd) fuel injectors.
Unlucky Drivetrain
The unfortunate drivetrain that is forced to live behind the high-horsepower Cummins is largely stock, which is a testament to Ford's strength and durability. A Cummins-to-Ford conversion flexplate and bellhousing from Destroked.com were used to mate the B-series engine to a John Wood-built 4R100 transmission. The transmission uses a billet torque converter and full billet internals and is controlled by a stand-alone PCS computer and D200 data logger.
From there, power is routed through the stock NP273 chain-driven transfer case, which is used at the strip to transfer power to all four wheels. The front Dana 50 axle was left relatively stock and retains the factory 3.73 gear ratio. The rear full-floating Ford 10-inch axle benefits from a Detroit Locker for added traction to the 325/60R18 Toyo Open Country A/Ts mounted on 18x10 American Racing Mojave rims.
Drag Details
While it is relatively easy to build a high-horsepower Cummins engine these days, Lightner's Super Duty has many extra details that underscore his drag racing experience. The rear driveshaft is fitted with a safety hoop to keep the driveshaft from pole-vaulting the truck if it should happen to come off on the strip. All of the plumbing is done with braided steel line and AN fittings, and the batteries and other components are easily accessible in the bed of the truck. The stock bed is fitted with bulged fiberglass bedsides that complement the matching front fenders and cowl induction hood. Normally, you would see white fiberglass fenders on an off-road race truck, but Lightner took a cue from the desert-race world to shed a few pounds from the truck and keep the tires covered on the dragstrip. Instead of being standard white, the fiberglass was hydroprinted by Real Image of Phoenix to look like carbon fiber.
Inside the truck, the drag racing theme continues. B&A Motorsports fabricated the rollcage from 4130 chromoly and dropped the cage through the floor in order to completely TIG-weld it before attaching it to the cab and the frame. The cage was then topped with Mastercraft seats and five-point harnesses from Driven Auto Parts for added safety. With the stock dash gone, Lightner used an assortment of Auto Meter gauges to monitor everything from boost pressure to voltage. He also used an old racing trick and rotated the gauges so that the highest acceptable value occurs when all the gauge needles are pointing straight up. This makes it easy to determine if there are any problems by just quickly glancing at the gauges.
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Turbo Auto Diesel built the B1 and B2 turbos that provide more than 100 pounds of boost to
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Turbo Auto Diesel provided Lightner with the P7100 injection pump fitted with 14mm plunger
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Two nitrous bottles are securely mounted on a billet mount in the bed of the truck. With t