was left in the hands of Power Hungry Performance in the form of custom PCM tuning.
2.5-inch S400
As if competing with the HEUI injection system isn’t enough of a challenge, Green’s local pulling class dictates that he can only run a map groove style turbocharger if its inducer size is 63.5mm (2.5 inches)—which is miniscule when it comes to feeding 7.3 liters of displacement. To make the most of the situation, Green reached out to a company on the leading edge of aftermarket turbo technology: Engineered Diesel. The call was answered with a competition-ready,
Thanks to a T4 turbo mount from Irate Diesel Performance, a 2.5-inch charger sits at the back of the 7.3L’s lifter valley. Built by Engineered Diesel, the 2.5-legal turbo is based on a Borgwarner S475 and features a 63.5mm billet compressor wheel, a 0.200-inch map width enhancement groove (MWE), and an 87mm turbine wheel inside a 1.10 A/R exhaust housing. Boost peaks somewhere around 57 psi during the course of a pull.
Knowing that powdered metal rods would never hold up to the kind of power he planned to make, Zach Green ditched the factory 7.3L Power Stroke in his ’02 F-250 in favor of a 150,000-mile forged rod engine out of a ’97. While Green made the mandatory upgrades a 7.3L needs to handle high horsepower (stronger pushrods, stiffer valve springs, and head studs), the rest of the long block is 100-percent stock.
After diesel gravity-feeds through a Beans Diesel Performance sump in the factory tank, it makes its way to this basic competition fuel system from Irate Diesel Performance. Combined with a regulated return system from Diesel Innovations, the Fuelab 41401 pump sends fuel to the rear of each head, and an adjustable Fuelab regulator keeps pressure set to 70 psi.
To get the truck into the 600rwhp range, 300/400 injectors from Performance Injection Systems are employed. The hybrid injectors flow 300cc worth of fuel and utilize 400% over nozzles. The oil demands of the injectors are met courtesy of a Gen3 high-pressure oil pump from Swamp’s Diesel, which mounts above a factory displacement (17-degree) pump.