The number of Piper Cherokee 140s in the United States flying with a tuned exhaust system from Power Flow has reached 800.
That is nearly 17% of the 4,883 PA-28s registered in the United States, Power Flow officials noted.
With a tuned exhaust, the Cherokee’s engine operates more efficiently, burning less fuel at the same cruise settings, company officials noted. Savings of 1.2 – 2.2 gph have been documented in test flights.
Pilots will see an increase of 30-130 rpm, a shorter takeoff roll and an increase in climb between 30% and 50%.
Tuned exhausts allow the engine to run more efficiently by evacuating more of the exhaust gases from each cylinder, thereby delivering virtually the full rated horsepower of the engine, Power Flow officials explain.
Power Flow tuned exhaust kits for the Cherokee 140 are priced at $4,075. They include everything needed for installation and take five to seven hours to bolt on. They come with a two-year/500-hour warranty.