Built 7.3L Power Stroke Makes 700+ HP on Fuel A Nasty 7.3L Packing Big Fuel, Oil, and Air Durable, dependable, and reputable. While virtually no one will argue the 7.3L Power Stroke doesn’t live up to these words, the venerable, HEUI-injected, large displacement V-8 isn’t particularly thought of as a good foundation for making big horsepower. But that’s exactly what motivated Shawn Matz to make his ’00 F- 250 anything but your average, run-of-the-mill Super Duty.