Crankcase breather routed into intake | FerrariChat
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Crankcase breather routed into intake

Discussion in 'Technical Q&A' started by ants2au, May 7, 2006.

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  1. ants2au

    ants2au Formula Junior

    Nov 19, 2003
    815
    Sydney Australia
    Full Name:
    Anthony
    #1 ants2au, May 7, 2006
    Hi,

    Been always wondering is it really important to route the engine breather back into the intake system?

    I am not too concerned about the emmission issues related to this, but more if there are any performance related benefits.

    I got to thinking that maybe it's a good thing, as it helps create a negative crankcase pressure (from the induction system), which allows the pistons to move better on the downward stroke. Does this make a lot of diffence compared to just venting the crankcase breather to atmosphere?

    Any thoughts?
     
  2. DMOORE

    DMOORE Formula 3

    Aug 23, 2005
    1,720
    San Diego
    Full Name:
    Darrell
    #2 DMOORE, May 8, 2006
    The only reason I know of that the breather is routed to the intake tract, is for emmisions reasons. Every race motor I've ever seen vents to atmosphere.

    Darrell.
     
  3. DGS

    DGS Seven Time F1 World Champ
    Rossa Subscribed

    May 27, 2003
    73,023
    MidTN
    Full Name:
    DGS
    #3 DGS, May 8, 2006
    It also keeps the engine bay cleaner. If you don't vent to intake, you'll probably want to fit an oil/vapor separator before blowing oil laden gasses out.

    If this is a car you run in winter, be careful about getting moisture in the oil separator. On any car, be careful about contaminants getting into the crankcase through an atmospheric vent.
     
  4. ants2au

    ants2au Formula Junior

    Nov 19, 2003
    815
    Sydney Australia
    Full Name:
    Anthony
    #4 ants2au, May 8, 2006
    Nothing doing with engine bay, the pipe to atmosphere will be pointing down to the ground, below chassis level (if I was to do it anyway).

    I have this done on my old Fiat. no separator or anything, straight to the ground (not very enviromentally friendly I must say)



     

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