<VV> Corvair overhead cam engine

[JVHRoberts at aol.com]

More to the point, the Astro engine was never designed for mass production. 
 
 
In a message dated 5/23/2008 11:51:35 AM Eastern Daylight Time,  
airvair at earthlink.net writes:

You're  also dealing with several decades of engineering advancement and
knowledge.  Remember that the Astro engine was a product of the  '60's.

-Mark


> [Original Message]
> From:  <jvhroberts at aol.com>
> Subject: Re: <VV> Corvair overhead  cam engine
>
> The first Subaru OHC engines used two belts, with  LOTS of problems. All
their other engines use one belt, the present  generation 6 cylinder being
chain driven. The 4 valve engines use idlers to  get lots of belt wrap, and
the present change interval is over 100K miles.  And there's LOTS of idlers,
etc., on the present Subaru engines, two either  side of the crank sprocket,
giving 180º of wrap, and an S wrap around the  oil pump, etc. One belt is
by FAR the more common practice.  


-----Original Message-----
From: Clark Hartzel  <chartzel at comcast.net>
Subject: <VV> Corvair overhead cam  engine

It is unlikely that one belt drove both heads.  I believe a  belt drove
he right side and another belt drove the left side.  If you  only had
ne belt you wouldn't need two adjusters!  In my machine tool  days we
sed a standard that you need 7 teeth engaged on a timing belt drive  to
ransmit the load.  We usually tried for more teeth but 7 would  do.
Clark Hartzel







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