When high-pressure common-rail first showed on the LB7 Duramax back in 2001, it transformed the way we look at petrol. Ultra-high injection pressure, solenoid-style, multiple-event injectors, and complete electronic control over the system delivered the most refined diesel overall performance we’d ever seen towards the table—along with quieter, cleanser engine operation. When Cummins hopped on the common-rail bandwagon in 2003, the end result was the quietest, cleanest-burning, and many powerful 5. 9L this had ever produced. Yet once the aftermarket got ahold of electronically-controlled high-pressure common-rail, its true untapped possible was realized. Through ECM tuning alone, another 200-250 hp could be added to a truck’s bottom line, thanks in large part to the factory injectors and high-pressure fuel pump being effective at supporting it. Then it absolutely was time to find out what a modified common-rail injector could do, which consequently opened up a complete new world.
Today, common-rail dominates the landscape—be it on the street, the dyno, or the track—so it stands to reason so many aftermarket organizations are building larger injectors for them. From 15-percent over stock to 500-percent over stock and beyond, there is an injector for everyone’s needs. But how will you know exactly what you’re getting when you buy aftermarket injectors? To answer that question, we consulted some of the biggest names in the diesel industry: Dynomite Diesel Products , Exergy Performance , RCD Performance , and S& S Diesel Motorsport . From nozzle modifications to internal body work, to spelling out the difference between solenoid and piezo injectors, to helping us understand a flow data sheet, this is what that they had to say.
877. 971. 0271
616. 551. 4330
309. 822. 0600
S& South Diesel Motorsport
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