I'll take your word for it. If I think about this too much I may blow a
brain gasket!
----- Original Message -----
From: "Neil Sherry" <neil@sherry02.freeserve.co.uk>
To: "bown" <bown@concentric.net>; "Kent Christensen" <lkchris@uswest.net>;
"'Buick-Rover-V8 mailing list'" <buick-rover-v8@autox.team.net>
Sent: Thursday, November 01, 2001 4:22 PM
Subject: Re: PCV Thread
> Actually it is not quite that easy. When the crank of, for example, a four
> stroke four cylinder engine has turned through 90 degrees the piston
moving
> up will not move as far as the one travelling down because of the angles
of
> the conrods (it forms the hypotenuse of a triangle). The shorter the rod
> relative to the engine's stroke, the more extreme this will be. So there
> will be a pressure pulse every quarter turn of the crank. Whether this
needs
> venting (or more to the point whether it can be vented) is another
question.
>
> Neil
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