7.3L POWER STROKE GARRETT POWER MAX INSTALL
7.3L Power Stroke Garrett Power Max Install
V incent Uriah began seeing tell-tale smoke at idle, loss of power and poor drivability with his 2003 Ford F-350. Those signs led him to believe that the nearly 250,000 miles he had on the original turbo may have finally taken its toll. He dropped off the truck with the team at Swamp's Diesel Performance in Lavergne, Tennessee, where diesel tech Casey Willard quickly checked the turbo for excessive shaft play. The shaft was sloppy loose, confirming Uriah's original guess that the turbo was bad. Rather than simply drop in another factory turbo, Uriah wanted to get some more out of his 7.3L Power Stroke to make it easier to tow and haul heavy loads as he regularly has to do, but he didn't want to break the bank either.
When it comes to bang-for-the-buck and easy-to-install turbo upgrades for your 7.3L Power Stroke engine the team at Swamp’s Diesel Performance enthusiastically recommend the Garrett “Powermax” GTP38R ball bearing turbo charger. The unit is basically the big brother to the factory Garrett turbo charger that came on the truck and bolts into place of the original turbo without too much difficulty. While the GTP38R is a drop-in replacement for 1999.5-2003 7.3L trucks, it can also be installed on 1994-1997 7.3L engines with additional components that are available from Swamp’s Diesel.
The Powermax GTP38R features an 88mm compressor wheel that provides 35 percent more flow than the stock 80mm wheel on the factory 7.3L turbo as well as a ported shroud housing that improves compressor flow range and surge control making it a great turbo choice for street/play trucks as well as tow rigs. The 1.00 A/R turbine housing allows for free flowing exhaust that reduces backpressure and reduces EGTS by as much as 200 degrees. The kit includes everything needed for the installation and fits F-250 and F-350 Super Duty trucks as well as Ford Excursions sporting the 7.3L Power Stroke engine. Since the additional airflow of the Powermax is recommended to be used with additional fueling and tuning upgrades it will work well with Uriah’s F-350 since it already has upgraded Swamp’s injectors and tuning.
Willard performed the swap on Uriah’s truck in less than two hours including photo slowdowns, but he has a lot of first-hand experience with these trucks and the install as well as the assistance of using a top-side creeper. The average DIY diesel gear-head would likely need more time to complete the swap in their garage or driveway, but shouldn’t shy away from the job unless they are worried about getting greasy. If you plan to tackle the project yourself be sure to practice safe shop techniques and use care while working around hot engine components like the turbo and exhaust piping. Follow along over the next few pages to see the main points of the removal of the original turbo and installation of the new Powermax Garrett turbo. UDBG
Vincent Uriah’s hard working 2003 Ford F-350 was in need of a new turbo to get the heavy loads he regularly hauls moving—the Garrett GTP38R Powermax was the perfect choice to replace his well-worn original Garrett turbo.