[s-cars] Crank Case Pressure and Turbo Smoke?

[Mark Strangways]

Me thinks me is gonna have to disagree with you on the vacuum in the maf to turbo hose.

If you have a big vacuum there you have trouble.
What are the restrictors to the air that would create a vacuum.
No throttle plates, no small diameter hoses, just the MAF and it's screens( if still present)
The AutoSpeed article should back me up on this.

Mark 
  ----- Original Message ----- 
  From: Djdawson2 at aol.com 
  To: strangconst at rogers.com ; cpayne at bconnected.com ; s-car-list at audifans.com 
  Sent: Tuesday, February 22, 2005 10:22 AM
  Subject: Re: [s-cars] Crank Case Pressure and Turbo Smoke?


  In a message dated 2/22/2005 6:43:58 AM Mountain Standard Time, strangconst at rogers.com writes:


    Which way is that pipe (off the valve cover to the MAF-Turbo hose) designed 
    to flow.


  It is supposed to flow into the turbo inlet... any crankcase pressure is supposed to be relieved by this flow.


    It should pull air out of the clean intake stream or is it designed to just 
    vent gases to the intake stream.



  It is designed to pull gases through the intake stream.  The crankcase can effectively be vented to atmosphere.  Recycling it through the intake is a means of lowering pollution.  There is almost always a vacuum in the turbo to MAF hose.  This is where the WGFV also gets vacuum to hold your wastegate shut under boost.
  HTH.
  Dave in CO