Amici,
Most (all?) reciprocating motors develop some harmonic vibration in the
crank. I
specifically address the 2.5 liter 6-cylinder harmonics at around 6,200 and
7,000+
rpm.
The theory of using a dampener on the nose of the crank is to reduce these
harmonics.
Given all the stories I have heard about the TR6 motor, it seems to me that
either the
dampener does a poor job, or that the cast-iron TR6 crank really is a wet
noodle.
The dampener weighs a lot and I could free up a lot of rotational mass by
replacing
it with a smaller diameter alloy pulley which would have the additional
benefit of
underdriving the water pump and alternator.
Track work calls for extensive time spent at killer-rpms, especially down
straights.
My street motor is not a dedicated racetrack motor, but also does yeoman's
service at
auto-X, hill-climbs and 1/4-mile sprints. As such, I do not spend a lot of
time at the
killer-rpms, and I try to buzz through them very quickly
Question: Would I significantly reduce the life of my motor by removing the
dampener?
If so, are there better dampeners than the stock Triumph unit?
Shane Ingate in Maryland
"Anyone can restore a car. It takes a real man to cut one up".
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