[urq] drawing...

[Claus Vegener]

Scott and Dave
I have a friend in Norway doing 1000Hp on a 92 S2.
Testing in a dyno shows, that at high rpm the valvecover gets full of oil in seconds so they plan to add an extra drain from the valve cover.
My experience is the same. My Vortex air/oil separator have no air to handle - it is full oil going through > 7000 rpm.
So what I do now is to establish the original oil drain to the pan with a 3/8" = 16 mm braided hose and T-in my breather hole from the upper back of valvecover to the same line.
A new breather hole is made close to the cap (so that is close to the middle) connected to the Vortex; oil outlet from that of course to the pan and oil mist outlet 
through the standard PCV valve from my 3B and furter on  to the coke bottle (catch can).
The engine is placed at a little slope in the car and doing max. accelerations it definitely slosh oil backwards.
Forward is not the problem, as I have not enhanced the brakes yet :-) 
In some days I will know if it works -

Glad to se the explanation of the vacum line from the iglo at the 10V. I had wondered why - but not my problem anymore.

Claus
  ----- Original Message ----- 
  From: QSHIPQ at aol.com 
  To: quattro at audifans.com ; urq at audifans.com ; Djdawson2 at aol.com 
  Cc: vegener at post7.tele.dk ; benswann at comcast.net 
  Sent: Thursday, September 06, 2007 11:10 PM
  Subject: Re: drawing...


  Dave 
  That drawing you sent me is not correct, specifically, it's not complete.  If you look at the back of the valve cover, there is a PCV pipe below and to the drivers side of the solid pipe in the back of the valve cover.  It goes from the valve cover to the 8ball at the top of the block.  At the 8 ball, you have 4 portals for PCV.  1 goes to the IM with ck valve, 1 goes to the internal solid pipe that travels to the turbo inlet with the variable pressure valve, 1 goes to the crankcase, and 1 goes to the valve cover.

  IMO, I would delete the variable breather valve, and run the breather to the top of the valve cover, and the ck valve replaced with a PCV valve out of the twin turbo supra.  This is a variable valve by definition, the one in the audi is not.  I would locate the breather in the center of the valve cover to avoid the problem of oil sloshing.

  Speaking of oil sloshing, if you gander at what the neon boys are going thru, they have the exact same problem, like comparing the double walled 5k valve cover with the 20vt.  On the new DOHC neon, the PCV was moved to the back end of the valve cover, ala 20vt/v8.  Riddle:  However, since the neon is a transverse motor, the oil gets tossed into the vent tube...  On hard right turns!  The trick fix is to get the SOHC early neon valve cover which has the PCV...  In the top center of the valve cover.  And just like here, the 'easy' fix, is to use a catch can.

  Sound familiar?

  Take a look at the car dave, not that drawing.  

  SJ aka PCV boy


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