<VV> Fwd: Harmonic Damper(Not balancer)

[Ken Pepke]

> From: "Smitty" <vairologist at cox.net>
> Date: June 13, 2011 11:54:44 AM EDT
> To: <virtualvairs at corvair.org>
> Subject: <VV> Harmonic Damper(Not balancer)
> 
> Smitty Says;  I don't know if is magic or not, but the 6th harmonic 
> torsional  vibration of an Early crank is shown in the SAE papers as 
> 4,300-4,400 rpm.

As I am no longer employed in GM Engineering I no longer have ready access to the SAE papers so I will take your word for it.  And we have seen more broken early cranks than late.  That would be as expected because there were far more early models produced.  

>> snip <<
> 
> Most of us and that includes you, are not qualified to say why they left the 
> damper off of the Late 95 engines.  

Granted I am not an authority but, I have been through the process enough times and I have been around long enough to know there are two primary reason for changes:  1.  To make things cheaper and 2.  To upgrade things that are not performing to corporate standards.  The first reason is exercised far more than the latter.  I am sure there will be nobody on this venue that will claim the inertia wheel / pulley is an improvement over the dampener nor will anyone claim the dampener is less expensive to manufacture.

>> snip <<

Like you said "I am putting dampers on all my Late engines."  Good idea ... and I would also.

Ken P
Wyandotte, MI
Worry looks around; Sorry looks back, Faith looks up.

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