Piper Navajo 310 ·  325 · 350 · 425 Why does your Navajo need ULTRAcooling? Because your engines are turbocharged. While turbochargers do allow your engines to produce more power and maintain manifold pressures at altitude, they also produce very hot induction air. This compressed induction air can get as hot as 300 degrees F, even though the outside air temperature may be at or below zero. Both Teledyne Continental and Textron Lycoming Pilot Operating Handbooks state that the horsepower of a turbocharged engine is reduced as the engine ingests hotter than standard day induction air. The effect on your engines is identical to the poor performance you experience on a small aircraft when the carburetor heat is applied, or when operating on a hot day. That's where ULTRAcooling is a highly efficient air-to-air heat transfer system that reduces the compressed induction air temperature, restoring the engine's lost power and efficiency. In other words, when ULTRAcooling is added to a turbocharging system, the engine is able to more closely maintain its rated horsepower. The key to ULTRAcooling performance is its fully integrated, multi-component design. The System is comprised of three major assemblies; 1.) A custom designed, high efficiency aluminum alloy heat exchanger designed to cool the heated compressed induction air using the colder outside air. 2.) An aerodynamically engineered P-51 style scoop positioned to maximize the recovery of ram air velocity from the propeller. This provides maximum high pressure cooling air to the heat exchanger core at all power settings and flight conditions, resulting in near constant inlet temperatures and power output at all altitudes. 3.) High flow induction manifolding, for transferring induction air throughout the system. Our design engineers were careful to design each component to perfectly interact with one another to ensure optimum performance and reliability. The benefits of American Aviation's ULTRAcooling System expend throughout the entire spectrum of aircraft performance. ULTRAcooling dramatically improves hotter than standard day operation, higher than sea level takeoffs, single engine operation, engine temperatures, and fuel efficiency. Plus, you'll have the advantages of extended range, improved twin engine climb rates, and higher cruising speeds. Improved Performance You have made a substantial investment in the purchase of your Navajo. Upgrading it with American Aviation's ULTRAcooling System will enhance your investment and you'll save money by flying fewer hours, which will more than pay for the upgrade during a typical TBO period. ULTRAcooling will continue paying dividends in improved performance, increased efficiency, greater safety, lower maintenance costs, and increased resale value. What Owner/Pilots and FBOs have to say about the Navajo and American Aviation's ULTRAcooling Article reprint from Papa Alpha 31 Magazine ULTRAcooling and the Navajo Article reprint from Papa Alpha 31 Magazine The Effects of Charge Air Cooling in the TIO 540 J2BD Engine