الموضوع: التربو !!!

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One cause of the inefficiency comes from the fact that the power to spin the turbine is not free. Having a turbine in the exhaust flow increases the restriction in the exhaust. This means that on the exhaust stroke, the engine has to push against a higher back-pressure. This subtracts a little bit of power from the cylinders that are firing at the same time..



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When air is compressed, it heats up; and when air heats up, it expands. So some of the pressure increase from a turbocharger is the result of heating the air before it goes into the engine. In order to increase the power of the engine, the goal is to get more air molecules into the cylinder, not necessarily more air pressure.

المفروض دلوقتى انى لما بضغط الهواء حرارته بتزيد (حسب مافهمت) طب ليه بستعمل coolerمش كده المفروض ان ضغطه حيقل


ومن الملاحظات اللى لقيتها انها لازم تستعمل بنزين رقمه الاوكتينى عالى ويكون له نسبة انضغاط اعلى علشان لو له نسبة انضغاط اقل ممكن يتحرق قبل ميعاده
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.

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