[TR] T3/4, fan,extension
TeriAnn J. Wakeman
tjwakeman at gmail.com
Tue Dec 11 17:00:16 MST 2012
On 12/11/12 1:54 PM, David B. Hammond wrote:
> I have removed the mechanical fan and extension. I have heard of the need to
> install a harmonic balancer, but I don't know why? Any discussion about
If you keep the engine revs below the 5000 RPM redline there is no
reason th install a harmonic dampener. However there is a harmonic in
the crank at around 5200 RPM that is breached too often tends to crack
the crank at the base of the flywheel mounting flange. The harmonic
dampener is meant to tame that harmonic.
If you use your 3 as a street driver and touring vehicle the mechanical
fan is a good thing to have. If you do some auto crossing a harmonic
dampener is insurance for those times you are looking at that upcoming
cone and not the tach. If you intend to autocross on a regular basis,
do hill climbs & the like you want to get the crank nitrided as well.
The next big harmonic is above 6000 RPM and tends to break the crank in
I guess I should have asked why you removed the mechanical fan &
extension in the first place.
More information about the Triumphs