Diesel World - - Contents -

It’s no se­cret that chas­ing horse­power with a 7.3L Power Stroke calls for big in­jec­tors, and thanks to mod­ern af­ter­mar­ket HEUI in­jec­tor tech­nol­ogy sub­stan­tial gains can be had with­out break­ing the bank. How­ever, ev­ery fac­tory in­jec­tion sys­tem has its lim­its—and the 7.3L’s is no dif­fer­ent. Once you ven­ture be­yond the 550-rwhp range (or, as a gen­eral rule of thumb, go larger than a 250cc in­jec­tor), you run the risk of the stock high-pres­sure oil pump not be­ing able to keep up. And if you’re un­able to main­tain high-pres­sure oil vol­ume be­ing de­liv­ered to the in­jec­tors, you’ll never re­al­ize the full po­ten­tial of a big set of sticks. To rem­edy this sit­u­a­tion and fully en­joy your truck, you’ll ei­ther need to add a higher vol­ume HPOP or run dual pumps.

In re­cent years, 300cc or larger in­jec­tors equipped with 200% over noz­zles have proven ca­pa­ble of sup­port­ing 650 rwhp or more and pro­vide great streetabil­ity with proper cus­tom tun­ing, but (as stated) they re­quire a larger dis­place­ment high-pres­sure oil pump or dual HPOPS to sup­port them. With a set of 350cc in­jec­tors fit­ted and 200% noz­zles on the way, ’97 F-250 owner Hastings Foote read­ied his highly mod­i­fied 7.3L’s in­jec­tion sys­tem for the in­creased high­pres­sure oil de­mand that was to fol­low. His pump of choice was the time-tested Gen3 unit from Swamps Diesel Per­for­mance. Of all the big in­jec­tor 7.3L Power Strokes we come across, nearly 50 per­cent of them are run­ning this pump. For an HPOP that works in con­junc­tion with the fac­tory pump, in­stalls in just two hours, and sup­ports any size in­jec­tor on the mar­ket, it’s no won­der the Gen3 is so com­mon in the 7.3L world.

 After be­ing bit­ten by the per­for­mance bug (and with a 5.9L com­mon-rail Dodge at his dis­posal for daily driv­ing and tow­ing du­ties), Hastings Foote de­cided to turn his ’97 F-250 into a play toy. Ready­ing the 140,000-mile, stock bot­tom end 7.3L Power Stroke for more power called for ARP head studs, Irate Diesel Per­for­mance com­pe­ti­tion valve springs and Smith Broth­ers chro­moly pushrods. Then, with a set of 350/200 hy­brid in­jec­tors on or­der, he knew it was time to step up to a higher vol­ume high-pres­sure oil pump, hence the rea­son for this ar­ti­cle.

Newspapers in English

Newspapers from USA

© PressReader. All rights reserved.