Although it doesn’t look fancy, the factory Ford 4R100 has been upgraded with a number of upgrades, including a triple-disc torque converter and numerous internal hard parts. Irate supplied their own Competition Fuel system, which uses a FueLab electric lift pump and is regulated at 70 psi of pressure. A high-performance fuel system is one of the most important parts of a hot rod 7.3L build. An Edge CTS monitor keeps track of anything that isn’t on the A-pillar. Since the 7.3L was designed to be a test bed for continually improving performance, Jake has a host of Isspro gauges, including boost, transmission temperature, and voltage. “A hard launch grenaded the factory axles” With a no-nonsense 0.110-inch jet, the Ford picked up a huge 9 mph along with nearly a half-second, with a 12.20-second 112-mph pass. ![]() With the truck running 12.60s, adding some nitrous to dip into the 11s was just too enticing, so a Nitrous Express kit was added. With a best of 12.68 at 103 mph at the track, the 7.3L has surprised many unsuspecting hot rods. “We’ve made a lot of laps down the dragstrip after we finished the truck, and we were pretty surprised to see that not only did it run 12s, it ran close to mid 12s,” says Jake. The turbo pushes an impressive 56 psi (without nitrous,) so before it was installed, Jake upgraded it with a 360-degree bearing for strength and longevity. The latest forged-milled wheel (FMW) 67.7mm turbo from BorgWarner was used, along with Irate Diesel’s T4 mount kit. The huge 350/200 Full Force Diesel injectors can easily max-out a factory HPOP, so the engine was upgraded with a Swamps Gen 3 piece, which supports virtually any size injector without dropping pressure. Pushing an estimated 600 horsepower with no nitrous, the 240,000-mile 7.3L Power Stroke in Jake’s ’02 Ford F-350 has proven to be extremely reliable, despite making more than three times the stock power. Jake also built his own traction bars at the shop, and upgraded the front outer axle shafts after a hard launch grenaded the factory axles. The factory input shaft, drum, and overdrive planetary were all upgraded, and the intermediate and output shafts were cryogenically treated for strength. From there, the rest of the Ford automatic was rebuilt, with a number of internal upgrades. The 4R100 transmission build started with a triple disc torque converter from Precision Torque Converters. With an estimated 600 horsepower on tap, the factory drivetrain and chassis needed help in getting everything to the ground smoothly, and without breaking. Tuning is performed through a Hydra chip, with a set of tunes from Gearhead Automotive Performance. The reason for the big fuel is simple, as the stock high-pressure oil pump (HPOP) was ditched in favor of a Swamps Diesel Gen3 pump, which fires huge by big 350/200 injectors from Full Force Diesel. Irate put together a competition fuel system using a Fuelab pump and regulator, that’s set at a serious 70 psi. In addition to improved airflow, the whole fuel system on the truck also received a makeover. Subscribe Our Weekly Newsletter Fuel and Oil The 4-inch exhaust continues on under the truck and exits out a 6-inch stack in the bed. Irate Diesel makes a kit that mounts T4-flanged turbos to the old trucks, so the first thing that went on the engine was a 67.7mm S400 turbo from BorgWarner, along with Irate’s intake and downpipe. Just because the short block was stock didn’t mean that Jake was going to take it easy, so a whole host of power-producing parts was added to help the 7.3L climb well past its factory 250-hp rating. “I never really started out planning on building a 12-second, 7.900-pound truck.”-Jake Enos T4 Conversion ![]() “We left the whole bottom end including the camshaft stock, because that’s what most customers do,” says Jake. “We just started adding parts to an old 240,000 mile ’02 7.3L, and things just kind of went from there.” The build began with some engine work in the form of ARP head studs, Smith Brothers pushrods, and Irate’s own valvespring kit. ![]() truck,” laughs Jake Enos, owner of Irate Diesel Performance. “I never planned on building a 12-second, 7.900-lb.
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