Installing a Bully Dog GT Tuner on a 2015 Ford F-250 Super Duty 6.7L
Digital Display of Power
The ever-popular Super Duty platform has been a solid performer since it debuted in 1999. Now in its third generation, this venerable workhorse has the ability to tow just about anything and has been a dependable work truck in all of its iterations. Whether it be a custom ’bagged and bodied single cab prowling the show circuit, a Crew Cab hauling the job force and all their gear to a site, or a dualie towing everything from trailers full of machinery to hay around a farm, the Super Duty has been tried and tested in all circumstances.
It’s role as a popular performer has led the aftermarket to develop all sorts of upgrades to get this stalwart to perform better, tow more, and unleash more power from the power plant humming under the hood. In this go-round we try to do just that with a Bully Dog GT Tuner and a ’15 Ford F-250 Super Duty with a 6.7L producing a healthy 440hp and 860lb-ft from the factory. But we were trying to squeeze out every last bit of power the Power Stroke could be coerced into making.
The installation of the Bully Dog tuner could not be simpler, and with just a few hours invested, it can yield noticeable power and a way to monitor vital outputs. The Platinum GT Tuner is capable of measuring exhaust gas temperatures (EGT) to protect against heat damage, and keeping an eye on boost levels to be sure the all-important turbo is performing as it should. It also provides accurate readings of trans, coolant, and oil temps, so you don’t have to rely on a sweeper gauge and guestimate whether you’re entering the danger zone. The GT Platinum offers up to 10 different tuning levels to help with towing, change the transmission characteristics based on the driver’s habits, maximize fuel economy over long distances, or head straight to an all-out performance setting that unleashes all the hidden potential restrained by factory settings. The Bully Dog tuner will be paired with a Rapid Flow Cold Air Intake system provided through Bully Dog that provides maximum airflow, has a conical filter for superior filtration, and is specifically designed to install easily into the stock location.
Follow along as we travel to Devious Customs in Riverside, California, to get their talented group of techs to install a Bully Dog GT Platinum Tuner to a daily-driven ’15 Ford F-250 Super Duty 6.7L.
The Bully Dog GT Platinum tuner pack includes the head unit that will be mounted to the windshield using the flexible windshield stalk, OBDII adapter plug, main wiring harness, and a preloaded Micro-SD card. Also from Bully Dog is the Rapid Flow Cold Air Intake system with a conical air filter, intake tube, and new airbox that drops into the factory location.
First on our list was the Rapid Flow Cold Air Intake system. We unplugged and removed the Mass Air Flow (MAF) sensor from the intake tube and set it aside to be reinstalled later.
We unbolted the top of the stock air box and removed the factory air filter. The kit came complete with all new components, so we removed it altogether.
Next, we unclamped and removed the stock air filter tube and set it together with the other components that we had pulled off.
Our cordless driver quickly buzzed out the bolts on the air box, which we removed and set aside.
We had to pull off the stock intake foam gasket from the factory air box, transfer it over to our new box, and tighten it down into place with the supplied kit hardware.
We slid the new coupler onto the turbo inlet, fit the Stage 2 tube into the coupler, tightened the hose clamps, and fit the tube into the airbox.
Our new conical air filter from the kit was fit onto the protruding section of the pipe, and we tightened the hose clamp securely.
We reinstalled the MAF into its new location in the Stage 2 tube and plugged in the electronic connector.
We fit the new lid from the kit onto the airbox, and using the attached spring clips, snapped it into place. With that, our Rapid Flow Cold Air Intake system was all squared away.
The first step in installing the tuner was to remove the side dash panel and weather stripping so the power cable could be routed through the dash later.
Next, we removed the bottom panel under the steering wheel and expose the OBDII port
The OBDII adapter was plugged into the port, and the power wire was connected to the adapter. The system needed electricity to function, so we had to tap into an existing wire on the power distribution box, conveniently located near the OBDII port.
We carefully checked each port on the power distribution box with our test screwdriver. The light means we had electrical current, which means we chose a suitable wire to tap into.
We clipped the wire using our cutters and exposed about 1/2 inch so we could splice it with our power cable from the OBDII adapter plug.
The wires were spliced together, we used a butt connector to make sure there was a sound connection, and wrapped it all in electrical tape to keep the dust out.
With the weather stripping and the side panel out of the way, were able to route the power cable under the dash, and through the side panel. It emerged next to the A-pillar, giving this install a much cleaner look.
We were ready to plug in the head unit cable to the OBDII adapter, one step closer to making some power.
Bully Dog recommends using the provided Micro SD card reader to download a software update from the website to be as current as possible. Our laptop computer had a Micro SD reader and we just plugged it in and downloaded.
With the brain of our tuner now updated, we slid the Micro SD into the back of the head unit, plugged in the power cord, attached the adjustable stalk, and decided where to place it on the windshield.
With the power flowing through our tuner, it sprang to life, and completed the installation process by feeding in the year, make, and model info. We followed the easy to understand prompts, and waited patiently until the process finished.
The install had finally processed, and we were ready to test out our new gains! With our new Bully Dog GT Tuner, we could monitor and adjust the engine temp, power-output levels, even shift on the fly by changing tuning levels while driving. In other words, we had complete control over our Power Stroke and could unleash it at any time! We had noticeable gains immediately with the Bully Dog Components—even using the conservative settings—and after just a few days of driving, we’re pretty sure we saw a gain in MPGs, too!