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Not exactly a direct answer 200

posted by  leugim on  Fri Mar 18 02:20 CST 2005
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last visit: Sat Oct 18 20:49 CST 2014
[RELATED]

From "How Stuff Works" - Turbo
...Too Much Boost
With air being pumped into the cylinders under pressure by the turbocharger, and then being further compressed by the piston (see How Car Engines Work for a demonstration), there is more danger of knock. Knocking happens because as you compress air, the temperature of the air increases. The temperature may increase enough to ignite the fuel before the spark plug fires. Cars with turbochargers often need to run on higher octane fuel to avoid knock. If the boost pressure is really high, the compression ratio of the engine may have to be reduced to avoid knocking.


Happy Motoring
Miguel





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