The early powerstrokes were single shot already, my understanding of the stage 1's is that they have the same nozzle just a larger fuel capacity so I thought that the programing would be the same, but on the higher horse tunes, which I'm guessing have longer pulse width, your running out of fuel with the stock injectors and the Stage 1's just allow you to take advantage of that.
I guess if you buy the injectors from them and they reburn for free this is a mute point, cuz that was my plan, just wanted the chip for now but didn't want to have to pay for new tunes in a couple months, but it would be nice to have some clarity on this.
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Put a Turbo on it!!!! 
'95 F-250 Powerstroke, 350,000 Miles, Mods: Phoenix chip, 140V IDM, Diamond Eye DP to 4" straight pipe, CCV mod, Amsoil synthetics throughout.
'04 F-350, XLT Lariat, Powerstroke, CC, Dually, SS exhaust, AirRaid intake and filter, Edge Evolution, PHP FICM programmer.
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