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 percent of the 4,883 PA-28s registered in the United States. The tuned exhaust, which usually replaces the original factory system, enhances the 140’s performance in a number of ways.
With a tuned exhaust, the Cherokee’s engine operates more efficiently, burning less fuel at the same cruise settings. 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 percent. One pilot, based at a field in Arizona at 4500 feet MSL, wrote: “Prior to installing the system, I’d feel lucky with a 50 – 100 FPM climb out. Now I’m getting 600 – 1000 fpm, depending on load.” Power Flow reports that the service ceiling for the Piper 140 increases by 2000 – 5000 feet and engines generally run cooler and smoother with their after-market system.
Power Flow tuned exhaust kits for the Cherokee 140 are priced at $4,075. They include everything needed for installation and take 5 to 7 hours to bolt on. They come with a two-year/500-hour warranty. For more information, visit www.powerflowsystems.com.