DIESEL TURBO
UPGRADES
HOUSTON
Compound turbo setups, single conversions, and S300/S400 builds for Cummins, Power Stroke, and Duramax. A system spec — not a plug-and-play installer.
Bolting on a Bigger Turbo
Is the Easy Part.
The System Spec Is the Job.
A larger turbo moves more air. That's the straightforward part. What changes is everything that has to support it — the intercooler that cools the denser charge, the fuel system that has to deliver volume to match, and the calibration that has to account for the new airflow map, spool characteristics, and boost targets. A plug-and-play installer drops a turbo on and calls it done. We write the system spec first: what turbo for this platform and this use case, what intercooler, what fuel delivery capacity, and what the tune file needs to look like when the turbo is installed.
The fuel system that has to keep up with the turbo is always part of the conversation before a compound setup goes in. The intercooler the new turbo demands is sized to the boost target — not to the factory charge cooler that was built for a stock spool rate. And the tune written for the new turbo setup gets written after the hardware is on the truck — not before.
Three Paths.
Same Requirement: Right for Your Build.
The turbo configuration that's correct for a sled pull competition truck is not the configuration for a towing truck or a street-performance daily. Spool rate, peak flow, thermal efficiency under sustained load, and packaging on your specific engine bay all factor in. We pick for the use case, not for the spec sheet.
The Turbo Is One Part.
The System Is the Build.
Every turbo upgrade creates a demand on the rest of the system. More air through the intercooler means the intercooler has to be sized for that flow — factory units are engineered for factory boost targets, and a compound setup runs well past that threshold. More power on the cylinder head means the fueling has to keep up — which means the lift pump, high-pressure pump, and injectors are all part of the conversation before the turbo goes in.
And when the turbo is on and the system is buttoned up, the ECM calibration gets rewritten for the new airflow map. Not adjusted. Rewritten — because the factory calibration was written for the factory turbo and its spool curve. A tune that isn't written for the new turbo is guessing at parameters the turbo didn't exist for when the file was written.
More Air Means More of
Everything Downstream.
The turbo delivers denser, cooler charge air to the cylinders. What happens at the cylinder and downstream is a function of everything else: fuel delivery at the injectors, combustion efficiency with the tune written for this setup, exhaust flow through the system after the primary turbine, and thermal management of the engine and transmission under the new load profile.
A compound turbo build on a Cummins 6.7 that doesn't address the 68RFE or built Allison downstream is a tuned truck with a transmission that wasn't spec'd for the new power level. We look at the full system and flag the next weak link — whether that's the gearbox, the axles, or the cooling capacity — before the build leaves the shop.
For sled pull and competition builds, this conversation is particularly important — competition power levels stress every component in the driveline simultaneously. Start with a build consultation and we'll lay out the full system picture for your power target.
Diesel Turbo Upgrades FAQ
What we hear before every compound turbo consultation.
COMPOUND TURBO
BUILDS. HOUSTON.
S300 and S400 compound setups, single turbo conversions, and full system specs for Cummins, Power Stroke, and Duramax. Every build leaves with a verified before-and-after dyno sheet — not a manufacturer's peak flow claim. Book a consultation and bring the truck in.
