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At the heart of the roots-style supercharger are the rotors. Here the rotors get coated with graphite for final assembly.
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The case contains the spinning rotors along its length. Before assembly, the surfaces are machined to specification.
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The counter-rotating rotors take air in through the inlet, and force it down into the engine through the outlet.
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Here the rotors are fitted into the case. The lobes on the rotors spin into each other and compress the incoming air.
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Since superchargers operate with tolerances in the realm of a few thousandths of an inch, all components are meticulously measured.
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Clearance measurements determine which components need to be machined, and how much.
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The rotor gears reside in the front bearing plate. The drive gear runs off engine power via a pulley, and is subjected to the most stress.
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Once everything checks out, the supercharger is assembled one last time, and is then ready for action.
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