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[TR] TR4A crankshaft extension

To: "triumphs@autox.team.net" <triumphs@autox.team.net>
Subject: [TR] TR4A crankshaft extension
From: john-marie@sbcglobal.net
Date: Mon, 6 Jan 2014 21:28:26 -0600
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
Hello List,

Am considering removing the stock fan and going with an electric fan on my 4A.
There is a "Fan Eliminator" kit available that bolts on in front of the
pulley, thus eliminating the fan and the extension.  My question concerns what
I have read on "harmonic damping".  My TR restoration book says that if the
fan is removed the crankshaft extension needs to be retained because it
provides harmonic damping for the crankshaft.  I don't get it.  In my
pedestrian mind, seems like less mass in front of the pulley is better.  Can
anyone shed a little light?  Thanks.

John DeLuca

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