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Preparation for the STILLEN supercharger

Originally Posted by G37Sam So if you turn the engine off does the turbo still spin? For a short period of time, yes. The turbo impeller/turbine wheel maintain some rotational

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Old 01-22-2010, 11:33 AM   #11 (permalink)
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Quote:
Originally Posted by G37Sam View Post
So if you turn the engine off does the turbo still spin?
For a short period of time, yes. The turbo impeller/turbine
wheel maintain some rotational velocity once the exhaust gases stop flowing. Obviously, once internal friction forces take over, the rotational velocity of the impeller/turbine decreases to zero.

Yes, turbos do add backpressure which can be seen to limit power output, but my point was the turbo requires no mechanical work from the actual engine to spin and produce power. The turbo simply works off of waste exhaust gas, and not the engine itself.
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