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Upgrading Your ISX Cummins Turbo: The Power Advantage in an ISX S400 Conversion KitThe Stock Turbo ProblemFor diesel enthusiasts familiar with the ISX Cummins engine, one critical limitation stands out above all others: the severely undersized stock turbocharger. With a tiny 2.6-inch intake wheel diameter, the factory turbo is woefully inadequate for a massive 15-liter power plant. To put this in perspective, this turbo is comparable to what you'd find on a 6.7L Ram pickup truck - already consid …

Fummins Compound Turbo Kits: The Best Twin Turbo Upgrade for Your Ford Cummins Swap Looking to turn your Ford into a diesel powerhouse? At Diesel Power Source, we offer engineered solutions for Ford Cummins swaps—known as Fummins conversions. Our industry-leading S480/S300 compound turbo kits are designed for high performance, low EGTs, and an OEM-like fit for Ford trucks from 1970 to 1998. What Is a Fummins Conversion? A “Fummins” is a Ford truck powered by a Cummins engine. E …

Turbo Trouble? What the P003A, P2262, P00AF, and P0299 Codes Mean for Your 6.7 Cummins If you're seeing codes like P003A, P2262, P00AF, or P0299 on your 6.7 Cummins, you're not alone—and it's likely your turbo is trying to tell you something. Whether you drive a Ram 2500, 3500, or HD workhorse, these codes all point toward a common issue: turbocharger or actuator malfunction. Here’s a breakdown of what they mean, what causes them, and how to fix the problem—so you can get back …