Turbo Kits | SPELAB

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FAQs about Turbo Kits

Most SPELAB turbos ship with a factory setting between 14–18 psi, safe for stock ECU setups. Models with wastegates (mechanical or electronic) can be tuned up to 22–25 psi—notably on products like the HE300WG for Cummins 6.7L.

On small gas engines like the 1.4L Sonic or Encore, factory fueling systems typically suffice. On diesel platforms such as the Duramax 6.6L LBZ/LMM, pushing boost beyond 22 psi may require high-flow injectors and lift pumps to avoid running lean.

Symptoms include laggy spool, muffled exhaust, or high EGTs at mid-high RPMs. A 3”+ high-flow intercooler and straight-pipe exhaust are recommended, especially for tuned 2013 Ram 3500 Cummins Turbo Diesel setups.

Some SPELAB low-pressure turbos (e.g., for Ford 6.4L Powerstroke) are designed for sequential twin turbo setups, running in series with high-pressure units. These configurations benefit from electronic boost control and coordinated fuel tuning.

Exhaust Gas Temperature (EGT) monitoring is essential in diesel builds. We recommend a 4-probe thermocouple with digital display at the exhaust manifold. If temps exceed 1350°F, consider enriching the fuel mixture, upgrading the intercooler, or retarding ignition timing. Many SPELAB turbo kits include pre-drilled EGT sensor ports.