POWER MAX

7.3L POWER STROKE GAR­RETT POWER MAX IN­STALL

Ultimate Diesel Builder's Guide - - Contents -

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.

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