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Why turbo and supercharger stop working?

Discussion in 'General Discussion' started by marco0020, Mar 26, 2020.

  1. marco0020

    marco0020
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    Aug 11, 2018
    Messages:
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    when you rev a engine and you are in neutral or you have the glutch pressed, the turbo o the supercharger start making boost. why they stop giving bust to the engine when the rev limiter start limiting the rpm? it makes no sense, supercharger is connected to the engine, it should staying spulled up same thing with exaust. if u watch a video of a spercharged car or a turbocharged car u se and you hear that both bosters are allaways spulled up also if there is rev limiter... please help me understanding this...
     
  2. Frank ツ

    Frank ツ
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    Jan 27, 2015
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    What you say is not really true.

    A turbocharger uses exhaustgasses to spool the turbine.

    If the engine is not under load as you say like in neutral it takes very little fuel to get the engine running therefor the exhaustgasses are very weak and not enough to build up boost

    Also when it hits the revlimiter it cuts the feul drasticly so the explosion in the cilinder is very small
     
    #2 Frank ツ, Mar 26, 2020
    Last edited: Mar 26, 2020
    • Agree Agree x 3
  3. marco0020

    marco0020
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    you'r right i didn't consider it... but what about supercharger?
     
  4. Cory5503

    Cory5503
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    In many of these videos, the cars are actually hitting a 2-step, rather than a traditional rev limiter. This allows the car to stay in it's peak power RPM range. In addition to this, cars with a manual trans will often be seen slipping the clutch while on a 2-step to build boost, as it puts the engine under a load. A transbrake does the same thing in an auto trans car, putting the engine under a load and allowing it to build boost.
     
  5. marco0020

    marco0020
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    thank you : )
     
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