<VV> REAR ENGINE HOUSING OIL LEAK - PCV

[moonpie8n at comcast.net]

You miss my point ,Bill...... [sometimes I talk in circles] 
MY point was that a simple PCV system, would be a good thing on a stock Corvair. I always cut the road draft tube off with 2 or 3 inches sticking up, then attach a hose with an early 64-5 pcv valve [ 1/4 pipe one end, and 5/16 hose the other] between the draft tube [to air cleaner] and the balance tube [between the 2 carbs]. This eliminates the connection to the air cleaner , all together. 
OH, and to answer your question,... DRAWING a suction is good for ALL engines, since this reduces much of the pollutants trying to migrate into the combustion chamber. When you have "out of round" cylinders [ Corvair must have that because of uneven expansion], this really helps . This pollutant mix is diluted by the cooled charge of incoming fuel, This way it is burned much more efficiently than migrating past the rings directly into the chamber. 
Bob Isaac 
Moonpie Racing 
----- Original Message ----- 
From: "Chris & Bill Strickland" <lechevrier at earthlink.net> 
To: "VirtualVairs" <virtualvairs at corvair.org> 
Sent: Tuesday, December 14, 2010 3:48:16 PM 
Subject: Re: <VV> REAR ENGINE HOUSING OIL LEAK - PCV 

moonpie8n at comcast.net wrote: 

> HI Bill , .... what you have described is exactly what you 
> want to happen , ... A SUCTION DRAWN ON THE CRANKCASE.... 
> This is a good thing, and what keeps the little leaks from 
> manufacturing the spots we all hate. The only problem is ,... 

... that with that little connection to the air cleaner, ala oem 
Corvair, there is no suction on the crankcase, and the balance tube only 
gets what fumes are forced out of the crankcase. You need to cap this 
air cleaner line to provide said suction. And, if you want to provide 
"ventilation", you need a fresh air inlet. Generally, isn't ventilation 
is preferred for street engines, and suction for race engines? 

If you don't get the leaks started by cankcase pressure, they are slow 
to develop by gravity, but once they get started, it is like opening a 
new freeway. 

Bill Strickland 
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