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  1. CRDIvgt's Avatar
    CRDIvgt
    CRDIvgt is offline Verified Tsikot Member
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    June 18th, 2008 09:00 PM #1
    You are correct Yapoy86. Turbo spins even at idle, it is just not enough to create the pressure boost at intake. The term "kicks in" refers to the increase in intake air pressure boost to create more engine power. So when the engine is idling for several seconds, the turbo spindle rpm will return to its "idling speed" really quick. Otherwise pressure boost is create for free which is not possible to happen
  2. yapoy86
    yapoy86 is offline Tsikot Member Rank 2
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    June 18th, 2008 11:10 PM #2
    Quote Originally Posted by CRDIvgt View Post
    the turbo spindle rpm will return to its "idling speed" really quick.
    this is true that turbo will quickly return to its idling speed when engine is idle... but we need to consider the bearings where our fast spinning turbos sit-in are very HOT and it needs continuous oil circulation to lower its temp to engine oil temp.. the bearings are so hot due to very fast spinning and can easily get cooked up if the oil will stop circulating immediately...

    VGT creates boosts even at low RPM's compared to Waste Gate Turbo that creates boosts only at high RPM's
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