<VV> Harmonic Damper(Not balancer)

[shortle]

Smitty, I don't have your experience with the need for harmonic balancers nor have I ever been to South Dakota but I do have a question for the group. Can a harmonic balancer be installed on an early engine? Like a 102 or 150 HP engine?
Timothy Shortle in Durango Colorado 81301


-----Original Message-----
>From: Smitty <vairologist at cox.net>
>Sent: Jun 13, 2011 9:54 AM
>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.  Not much danger there for the average drivers engine. 
>When they changed the stroke in 64 that obviously changed the max vibration 
>point.  I have read (and maybe one of you can tell where the statement came 
>from) that with the Late engine, destructive vibrations were noted as low as 
>2,700 RPM.  If that is the case, then a cruise speed of 60 MPH is pretty 
>close.
>Most of us and that includes you, are not qualified to say why they left the 
>damper off of the Late 95 engines.  Many factors come into that other than 
>stroke.  Even the slight difference in the sharpness of the impact of the 
>higher compression forces would affect torsional vibration.
>As a survivor of a broken crank at Midland South Dakota. I am putting 
>dampers on all my Late engines. 
>
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