This is the AirDog II-4G DF-100 fuel system for the 2015-2016 Chevy/GMC Duramax 6.6L Diesel. This diesel lift pump mounts to the frame jig in front of the fuel tank for a clean looking installation. The suction side hooks up to the factory suction fitting in the fuel module. The pressure side connects directly to the factory injection pump feed line on the frame. The AirDog Air/Vapor return is sent back to the tank through a filler neck tee. This lift pump system is one of our easiest installations. Our Duramax kits usually see the largest performance gains as these trucks do not come with a lift pump from the factory. This is a 100GPH (Gallon Per Hour) fuel system for stock fuel trucks. Check out our installation manual for a list of parts that are included with this kit.
The Airdog II system has been redesigned to be more efficient and reliable than ever before! Our new 4G technology has been combined with proven AirDog II components such as our Demand Flow Technology, Adjustable Fuel Pressure Regulation, and our patented Air/Vapor Separation to create the most advanced direct current fuel pump to date.
Our patented air separation, along with water separation and superior fuel filtration, will ensure your expensive injection components are protected from harmful contaminates. Besides the obvious advantages of superior fuel filtration, the air separation improves injection system life by allowing nothing but a solid column of fuel to enter the injection system. This eliminates metal to metal contact from moving parts that would normally be allowed by air in the fuel.
The patented air separation increases engine efficiency by eliminating spray pattern disruption due to entrained air. This allows the engine to keep its desired injection timing which allows for a more complete burn of fuel entering the cylinder. This increases overall engine efficiency across the power and torque range!
4G motor technology is a smaller version of an industrial hydraulic pump setup. In an industrial hydraulic pump, you have an electric motor connected to the pump by a coupling. The purpose of the coupling is to compensate for minor amounts of misalignment and random movement between the motor shaft and the pump shaft.
The 4G is a four bearing design. There are two bearings supporting the motor shaft and two bearings supporting the pump shaft. The pump shaft, being supported on both ends by bearings, reduces shaft vibration which reduces pump noise and prolongs shaft seal life.
This design allows us to completely remove the electric motor from the fuel pump circuit, which keeps diesel fuel from ever entering the electric motor in the unlikely event of a radial pump shaft seal failure. What does this mean for you? Quieter, longer lasting pump operation!
The installation of the AirDog II-4G system has been designed with the customer in mind. We know not everyone has special tools or fabrication skills, so we made the installation as easy as possible with basic hand tools and the, occasional, power drill. The quick-connect fittings and fuel lines make this a true plug and play installation, reducing the overall installation time. Our step-by-step manual outlines each process of the installation and is accompanied by visual guides to aid your progress.
The AirDog ® II-4G is designed to operate with flows at pressure beyond the maximum requirements of the engine. It receives fuel under vacuum from the fuel tank containing entrained air/vapor, particulate contaminates and unknown quantities of water.
The fuel passes through the water separator which removes the large particulate contaminates that could damage or jam the Gerotor fuel pump. The fuel, with only entrained air/vapor and tiny particulate contaminates remaining, enters the fuel pump.
The fuel, now under pressure, enters the fuel filter. As the fuel passes through the filter media and the remaining particulate contaminates are caught and contained, the entrained air/vapor is also separated. Through the positive fuel air separation features of the patented AirDog ® II-4G, the separated air/vapor is discharged from the filter and back to the fuel tank through the Primary Air/Vapor Discharge Port.
The fuel passing through the filter media is now free of contaminates and power robbing air/vapor. At pressures and flows able to meet the needs of the engine, it exits the fuel filter through two passageways. First, the fuel for the engine passes into the fuel pickup tube and on to the engine. Then, the excess fuel not needed by the engine recycles internally through the pressure regulator back to the water separator. This process is called Demand Flow. Whatever the engine does not need is recirculated back through the suction side of the fuel pump. This is what allows the AirDog II-4G to have such a low flow return back to the tank.
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