drawing...

[QSHIPQ at aol.com]

Claus
Sounds like a cool audisportlike project!  Is this a mechanical lifter  or 
hydraulic lifter engine?  Does it have the windage tray out of the  AAN?  Is the 
crank knife-edged?  Something doesn't sound right, if  there's that much oil 
in the head, there's that much less in the  crankcase!  It appears you believe 
that this is due to the 7k rpm  redline?  Or...?
 
My own thinking is there is a lot of oil spraying around in that head, no  
different than the 10vt.  However, the 10vt has a lower splash shield  (hence 
the double wall design) that would take almost any amount of spray from  the 
head without injesting oil.  Interesting a step back in design of the  valve 
cover with a step forward in dohc, exhaust manifolds, water cooling,  etc...  I'm 
convinced that PCV is one of the first places cost is cut by  the bean 
counters.  Here, the original design is a problem in a  bone stock motor on the v8 
and S cars....  When I look at how my DOHC 4.5L  I6 toyota *truck* motor deals 
with PCV (including a perforated anti-slosh 'box'  where the PCV valve plugs 
in), the audi compromises here couldn't be more  obvious.
 
JNR (tm- Paul K)
 
Scott J
 
In a message dated 9/6/2007 5:17:55 P.M. Central Daylight Time,  
vegener at post7.tele.dk writes:

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



 



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