<VV> Corvair overhead cam engine

[Mark Corbin]

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