<VV> Harmonic Balancer / Solid Pulley on 140

[Frank DuVal]

Rodney, while there is nothing wrong in your approach, it goes waaayyy 
over the top for most Corvairs. GM never balanced the harmonic balancer 
for use with only one set of crank, rods, etc. They were replacement 
items from the parts bin at a dealer. Each balancer was balanced when 
made to itself. So every balancer is exchangeable on any engine without 
upsetting balance. Unless you have drilled the balancer on a particular 
engine to improve things, then when your balancer fails, you must start 
all over again with all the separate parts. Way too much work.

Same with Corvair flywheel. It should be balanced to itself, not to 
correct internal parts imbalance. The next clutch job and you will have 
to start all over again. I have my flywheels balanced after I replace 
the rivets with bolts.

Corvairs are not externally balanced engines. Some others are.

Maybe I just didn't understand your comment?

Frank DuVal

On 6/12/2011 12:00 PM, Rodney Sampson wrote:
> I'd only use on an engine that's been balanced with the rest of the engine components.
> When I send my motor out to be balanced, pulley, crank, pistons, rods and flywheel
>    go.
>
> Thanks
> Rodney Sampson
> HACOA
>
> Message: 9
> Date: Sun, 12 Jun 2011 11:49:00 EDT
> From: HallGrenn at aol.com
> Subject: Re:<VV>  Harmonic Balancer / Solid Pulley on 140
> To: hennerfeind_joe at yahoo.com, virtualvairs at corvair.org
> Message-ID:<143a5.72fa9318.3b2639ec at aol.com>
> Content-Type: text/plain; charset="US-ASCII"
>
>
> In a message dated 6/12/2011 9:12:46 A.M. Eastern Daylight Time,
> hennerfeind_joe at yahoo.com writes:
>
> I picked  up my 140/manual that I am going to install in my 110/PG car and
> noticed the  harmonic balancer is probably on its last leg.  With cost in
> mind, what  is the concensus on putting a solid pulley on it?  The 110 I am
> pulling  has a solid pulley.  Thanks again, Joe
>
>
>
> The extra cost of the harmonic balancer was warranted to protect the lower
> end from harmonic vibrations that could damage or destroy the crank and/or
> bearings according to my information.  My local Chevy dealer put a solid
> one on my '68 110 Monza 4 spd in the early '70s that I removed a few months
> later because I could feel a roughness when the engine was revved to the
> upper  RPMs.  The good, used harmonic balancer I got from a junk yard and
> installed cured the issue.  I later learned that GM's engineers specified  the
> harmonic balancer for this reason (as they did on other GM  engines).
>
> Bob Hall
> Group Corvair
> Corvanatics
>