[urq] Too much Crankcase ventalation?

QSHIPQ at aol.com QSHIPQ at aol.com
Wed Sep 5 11:51:11 EDT 2007

I might point out to you both, that pushing sloshing oil thru a breather,  
really doesn't dictate a PCV operational problem, this defines a bad PCV design  
problem.  It brings to light that big weight transferring pigs, will stuff  
raw oil into the breather mounted at the back of the head without a  diverter.  
  A catch can might catch it, but you still have the  problem of oil in the 
breather.  IMO, every single 5psd v8 quattro had  this problem from factory 
new.  In fact, I had a customer complain about  oil consumption to audi on his 
5spd from day 1,  to the tune that audi  replaced the engine complete (now in 
ingos possession)...  It still sloshes  oil into the breather, and the complaint 
documentation to audi didn't stop after  the motor replacement.
The *benefit* of a proper design is that you don't get the stinky oil smell  
(k&n filter design), your oil consumption will reduce dramatically, and the  
exhaust will be cleaner.  Interesting, when you look at what Magnuson and  
other add-on supercharger guys do with PCV routing.  They spend a lot of  time and 
money on getting that part of the equation just right.  Why?   Because, you 
start to show your sig-o how to empty a catch can, or that the oil  smell is 
'normal', you can lose the total purchase order on job 1.  I put  proper PCV in 
the bin with the PS seat heater repair.  A PITA you'd rather  do without when 
it doesn't work right, but you spend silly money to get it right  for all the 
obvious reasons.
It's part of Carb certification to get PCV right, and I really believe that  
EPA will only get tighter on this wrt emissions.  
In a message dated 9/5/2007 10:35:40 A.M. Central Daylight Time, Djdawson2  

This is the same experience I've had.  Mine is a '93 UrS4 with an  AAN, and 
runs in the lower 12 second range as well.  Upon launch, oil  goes 
everywhere... typically 1/2 quart pushed out the breather on  each run.  The car isn't 
geared appropriately for the 1/4 mile, so I end  up going through the traps at 
over 8000 rpm.
During daily use, this is not ever an issue... but very annoying during a  
hard launch on the street or track.


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