How Does Twin Turbo Work?
Turbochargers are used to shove more air into the engine than it would able to ingest on its own. Twin turbo setups are most often used to provide the power increase of forced induction without drawbacks of a larger single turbo.FunctionTurbochargers use an engine’s high temperature/high velocity exhaust gases to power a compressor, which shoves air into the engine.InertiaTurbocharger compressor blades have inertia (the tendency to resist acceleration), which causes “boost lag” at low RPM. Large single turbos have large blades, which means that full boost might not come on until 3,000 to 7,000 RPM.Twin BenefitsUsing a pair of smaller turbochargers increases boost at low RPM (by reducing inertia and increasing air velocity through the compressor impeller), while maintaining the high RPM output of a single large turbo.DrawbacksThe only real drawbacks to a twin turbo setup are cost and complexity. A large single turbo might be best for drag racing, top speed racing and offshore powerboat
