1. Attachments are working again! Check out this thread for more details and to report any other bugs.

carbon vapor asborber little to no difference weather in or not

Discussion in 'Gen 2 Prius Technical Discussion' started by chronon, Feb 19, 2021.

  1. chronon

    chronon Active Member

    Joined:
    Jun 14, 2007
    601
    106
    3
    Location:
    here and there aint be in frozen wasteland no mo..
    Vehicle:
    2005 Prius
    Model:
    ----USA----
    measured about 25 g/s with and without the absorber at about 3000 rpm ..

    Without absorber :
    about 15 g/s at 2000 and about 2500 gives about 20 .. 10 happens around 11-1200 ..

    I don't route cold air in through the snorkle .. but route to pull warm air off the head area .. ambient in the 70's ... running intake air in the 90's .... hotter air is less dense and will weigh less than colder air .
     
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,156
    50,059
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    should we remove it?
     
  3. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    7,855
    3,968
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    Can you provide more details about the "carbon vapor absorber" you're talking about? Like what part it is and where it is on the car. How does it relate to the air intake snorkel?

    With the low-level detail in the post, it makes little sense to me.
     
  4. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,686
    39,235
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I’m lost. Not that it takes much.
     
  5. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    7,855
    3,968
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    Mendel Leisk likes this.
  6. 05PreeUs

    05PreeUs Senior Member

    Joined:
    Oct 1, 2016
    1,097
    563
    0
    Location:
    MSP
    Vehicle:
    2005 Prius
    Model:
    N/A
    Well DUH! Atkinson cycle.

    BTW, more air in from a more open air filter = more DIRT, never a good thing.
     
  7. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

    Joined:
    May 12, 2018
    7,434
    6,916
    1
    Location:
    Pennsylvania
    Vehicle:
    2018 Prius c
    Model:
    Two
    I presume you mean the charcoal filter in the engine air cleaner? The one that is there on USA models to absorb gasoline vapors from a recently shut down engine to keep them from somehow backfeeding out the air intake?

    I can't imagine it would ever make a difference for airflow- surely it's been engineered to be large enough to allow enough flow under all conditions. Heck, they're probably just using one from another car with an otto-cycle engine just to save a few pennies.

    Atkinson engines just don't care about flow.