AOPA's 2001 Bonanza Sweepstakes - Jan. 23 Pictures and Commentary

November 11, 2009

Pictures and Commentary

Jan. 23 - By the end of this week, the Turbo Alley Turbos Inc. Whirlwind System II turbonormalizer system should be completely bolted on the Superior Air Parts Certified Millennium engine.

Recently, the Whirlwind System II turbonormalizing system was upgraded by changing to a more efficient intercooler, and completely redesigning the induction system from the compressor to the fuel injection throttle body.

The Rammer, TAT's new generation intercooler, is approximately 40 percent larger than the model it replaces. This feature, combined with larger and less convoluted high strength 6061-T6 aluminum alloy induction system tubing, causes a 50-percent increase of intercooler efficiency. The results are easier engine breathing, and much cooler engine inlet air. The gains are even better than the experts at Tornado Alley Turbo were expecting.

Simply put, a Whirlwind System II equipped engine recovers approximately 25 to 30 more horsepower (in an IO-550) than the previous system did, while keeping CHTs manageable. There's never an indication on the CHT or oil temperature gauges that would prompt the owner of the system to think that he was trading speed for engine life.

While many pilots believe that only those who are happy sucking on oxygen up above 18,000 feet will benefit from a turbonormalizer system, there are many advantages for low-level fliers. The Whirlwind System II has been proven to reduce takeoff roll distances at high altitude airports. This isn't news to anyone who understands turbonormalizing systems, but what might surprise some pilots is shorter takeoff distances (approximately 25-percent improvement) and improved climb rates (approximately 200 feet/minute) during high ambient temperature conditions, even at sea level. These safety margin gains are significant for country fliers who operate in high temperatures.

Installations of this system on clean, well-maintained A-36 Bonanzas have resulted in airspeeds of 195 to 198 knots at altitudes as low as 12,500 feet. For those that are willing to fly up in the flight levels, speed gains are large enough to make King Air pilots keep an eye on the rearview mirror. While 210 knots is common, John Deakin, a Bonanza owner, recently reported 230 knots true airspeed in his Whirlwind System II-equipped V35A Bonanza.

Each Whirlwind System II installation features a two-year, 250-hour warranty on turbo components, and a four-year, 1,000-hour warranty on exhaust and induction air components. In addition, included with every system is comprehensive ground and in-flight orientation. In less than a year, one lucky AOPA member will be getting the lowdown from the Tornado Alley Turbos team on how to manage this versatile system. In the meantime, learn more about this system by going to the Tornado Alley Turbo Web site at, or call Tim Roehl at 877/ 359-8284 or 580/ 332-3510.

For those who are a little foggy on the basics of turbonormalizing, and the advantages that will be realized by the winner of the 2001 Sweepstakes Bonanza, see the discussion on turbonormalizing at