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How to Turbo a Race Car

Part 1: How a Turbo Works

Part 2: Turbo Matching

Part 3: Installation and Fabrication

Part 4: Engine Tuning

Part 5: Track Approved

How a Turbo System Works

Engine power is proportional to the amount of air and fuel that can get into the cylinders. All things being equal, larger engines flow more air
and as such will produce more power. If we want our small engine to perform like a large engine, or simply make our larger engine produce
more power, our ultimate objective is to deliver more air into the cylinder. By installing a Garrett® turbocharger, the power and performance of
an engine can be dramatically increased.


How a Turbocharger System Works

(1) Compressor Inlet: Opening through which ambient air passes before entering the compressor.
(2) Compressor Discharge: Ambient air is then compressed which raises the air’s density (mass / unit volume).
(3) Charge Air Cooler (aka Intercooler): cools the compressed air to increase its density and to increase resistance to detonation.
(4) Intake Manifold: Directs dense air into the engine’s cylinders. Each cylinder draws in an increased mass flow rate of air. Higher
air mass flow rate allows a higher fuel flow rate (with similar air/fuel ratio). Combusting more fuel results in more power for a given
(5) Exhaust Manifold: Directs burned fuel and exhaust gasses from the cylinders towards the turbine.
(6) Turbine Inlet: Directs high temperature exhaust gas towards the turbine wheel. The turbine creates backpressure on the engine
which means engine exhaust pressure is higher than atmospheric pressure.
(7) Turbine Discharge: A pressure and temperature drop occurs (expansion) across the turbine, which harnesses the exhaust gas’
energy to provide the power necessary to drive the compressor wheel.

Components of a Turbocharger

Components of a Turbocharger