<VV> PVC Blockage? -- PCV !!

[Mark Durham]

My understanding of the positive crankcase ventilation system is it was
the first step in emissions systems, and was a retrofit to the earlier
corvairs. My original draft tube car worked just fine, however, it does
pollute the air, whereas the current Corvair has a PVC on it which
sucks out the gases, routes them to the intake where they will be
burned. The little hose provides a pressure to the other side of the
PVC to shut it off at higher engine speeds when it is needed less.
Mark Durham

Sent from my Windows Phone
From: Bill & Chris Strickland
Sent: 4/13/2013 0:05
To: virtualvairs at corvair.org
Subject: Re: <VV> PVC Blockage? -- PCV !!
> Why is there a PCV valve on the '62s, 63s & all (non-'61) FCs?
> Just wondering...

Just because there is a dang valve (or orifice) there doesn't mean the
system works like a positive ventilation system ... just something to
keep CARB happy so they could sell Corvairs in Californ-e-a.

The real question being, since it really doesn't work, why did
penny-pinching GM spend the money to design and implement it? Or, maybe
it wasn't "designed", but simply "implemented"?  Were sales in CA 'that'
important?  Well, it wasn't a road draft tube (which actually works
better) ...

Don't get me wrong -- a properly designed and implemented PCV system is
a boon to internal combustion engines -- improves longevity and can
improve performance (also helps control crankcase pressure, and thus, by
corollary, oil leaks) -- too bad GM didn't put such a system on the Corvair.

My initial post concerned the spelling of the acronym. And then, failing
to keep my mouth shut, I posted further.

Or, maybe the question was for a different Bill?

mo,

Bill Strickland
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