Variable compression engine to debut in 2018

Discussion in 'The BS Topic' started by CamaroMan79, Aug 16, 2016.

  1. CamaroMan79

    CamaroMan79 Veteran Member Lifetime Gold Member

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  2. Lowend

    Lowend Administrator. .a car, a man, a maraca. Staff Member Lifetime Gold Member

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    I was reading about this earlier... it's an interesting idea. They are taking advantage of lower compression and more boost pressure (better cylinder filling) to get more power
     
  3. CamaroMan79

    CamaroMan79 Veteran Member Lifetime Gold Member

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    I just wonder about longevity with the added mechanical parts.
     
    Last edited: Aug 16, 2016
  4. Jimmac

    Jimmac Veteran Member

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    Probably a good idea when it works, but that just looks like more parts to go wrong. Like the direct fuel injection I think gm uses. Listen in to the garage talk radio on saturday mornings, they were saying how this good idea isnt such a good idea because of the carbon build up on the intake valve has to be cleaned every 3-5000 miles. Jim
     
  5. Patrick73RS

    Patrick73RS Veteran Member Lifetime Gold Member

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    ^ yup. Got nailed paying for that myself. I hear they are looking at installing an additional injector upstream of the intake valve that fires periodically to address the carbon buildup. The carbon buildup cost should be covered by them. They created the problem.
     
  6. danbrennan

    danbrennan Veteran Member Lifetime Gold Member

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    Last edited: Aug 17, 2016
  7. Mike N

    Mike N Administrator Staff Member Lifetime Gold Member

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    Wonder what that's going to do for quench and flame travel if they limit how far the piston comes up to the head?
     
  8. bracketracer-78

    bracketracer-78 Veteran Member

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    Would it be easier to control the dynamic compression instead of the static compression?
     
  9. danbrennan

    danbrennan Veteran Member Lifetime Gold Member

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    I believe they're doing that, too, with the intake cam phaser. They talk about using a quasi Atkinson cycle(late intake valve closing). Or a Miller cycle, if they have boost at that point.
     

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