If You Can't Run With Bully Dog, Stay on the Porch

During a phone call from Stephen Clarke of Bully Dog Industries, up in Aberdeen, Idaho, he shared with me some performance dyno numbers pertaining to the Bully Dog Power Pup Downloader and nitrous oxide systems for the Chevrolet Duramax 6.6L Diesel. We made arrangements for him to drive the Bully Dog Chevy Duramax down to SoCal for some serious dyno time.

About the Bully Dog Power Pup Downloader
The Power Pup Downloader is a computer power program capable of producing 50, 70, or 95 hp, with the ability for the serious off-road enthusiast to upgrade to 150 additional hp.

1. After getting the burly... 

   

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1. After getting the burly Chevrolet Duramax 6.6L centered on Brothers' Dynojet 248C Dynamometer drum rollers, it was cinched down.

The Power Pup also gives the driver the abilityto remove the speed limiter on the '02 and '03 Duramax, and the ability to adjust the speedometer for different sized tires. The downloader contains OBD-II functions to scan and erase engine codes. The customer can also purchase a 150 additional hp code from Bully Dog to be imported into the existing Power Pup unit. An optional dual-stage nitrous installation kit can also been plumbed into the system for that additional instant neck-snapping torque and power.

To handle the Duramax's increase in horsepower, it is recommended to install the Bully Dog Transmission Upgrade kit. This kit consists of additional clutch discs to be installed with certain clutch packs. A valvebody will match transmission fluid pressures and shifts with the torque converter and increased horsepower.

We called the team at Brothers Performance in Corona, California, known for its truck, engine, and suspension components, to reserve some dyno time on Brothers Dynojet 248C treadmill.

2. The Bully Dog Edition Chevy...        read full caption 2. The Bully Dog Edition Chevy Duramax has become the company's mule for R&D projects and demonstrations.	3. At first glance, the Duramax...        read full caption 3. At first glance, the Duramax Diesel appeared pretty tame, but the more we scanned the engine and compartment, we began to notice some additional horsepower treats.	4. Of all the additions to...        read full caption 4. Of all the additions to the engine that caught our eye, the dual NOS solenoids really stood out, which means only one thing -- excitement. Bully Dog's Bully Kicker Kit includes a 15-pound nitrous bottle complete with size 6 AN lines and features a bottle pressure gauge and two toggle and pressure switches. The Dual Shot Kit also includes both a high-performance, small 0.063 solenoid and a larger 0.125 solenoid. The Bully Dog nitrous kits are dry systems. To get proper nitrous gains, a match up with fuel flow is required. The kit coordinates the truck's diesel fuel input and engine displacement.
5. To increase airflow into...        read full caption 5. To increase airflow into the Duramax air intake, Bully Dog developed a serious air intake system and filter, as well as RFI (Rapid Flow Induction). The RFI air cleaner and shroud also prevents air buffeting and hot-air buildup. Bully Dogs' 4-inch-diameter stainless steel exhaust system increases the exhaust gas volume, which exhausts with less restriction.	6. All of the electronic leads...        read full caption 6. All of the electronic leads and probes were connected to the Duramax, and the hood was closed to create a more real-world environment during testing.	7. Bully Dogs' Stephen Clarke...        read full caption 7. Bully Dogs' Stephen Clarke pre-programmed the Power Pup with the Duramax computer prior to the multiple dyno pulls to determine the torque and horsepower increases.