Hi Jack, what you describe is exactly what I did half a year ago. And it worked
like a charm. Runs as calm as my allday driver. But one question came up when I
watched the guy doing patiently his work.
After having balanced the wheels dynamically he put them on the car to do the
static balancing (he called it electronical balancing). In this process he
glued some more weights on the rim. I wondered whether these added weights
normally would disturb the dynamical balancing. How could he know where to glue
the weights (outer or inner edge)?
Just a thought from an unknowing....
Eric BT7
Heinsberg/Germany
-----Urspr|ngliche Nachricht-----
Von: owner-healeys@autox.team.net
[mailto:owner-healeys@autox.team.net]Im Auftrag von P.J.Aeckerlin
Gesendet: Freitag, 3. Februar 2006 17:28
An: rdavies1@cox.net
Cc: Healeys
Betreff: Re: scuttle 'shake, rattle and roll'
Ron, tremendously sorry but dynamically balancing on the car is
absolutely impossible, unless you change the definition of dynamic
balancing. For dynamic balancing it is imperative to very accurately
measure the various forces trying to tilt the wheel, and that can only
be done when you fit the wheel on a dynamic balancing machine. You have
to realize that a dynamic balancing machine measures the sideways forces
which tend to bring the wheel in a wobbling motion, not only the
vertical force created by the spinning of the wheel. It is the
capability to calculate the exact weights and the exact spots on both
the inner and the outer rim of the wheel that makes the difference
between dynamic and static balancing. A person who claims he can do
dynamic balancing while the wheel is still on the car doesn't know what
he's saying. I've been in the tire business long enough to know what can
be done and what can't be done! If you are looking for the best
solution to a problem you first have the wheel with the tire dynamically
balanced, then fit it to the car and then do a static second balancing
run to eliminated drum unbalance. And if you have the time and the tire
merchant is willing, have the wheel + tire matched. That means you do a
first dynamic run, mark the wheel and the tire and note the suggested
weights, rotate the tire 45 degrees over the wheel, balance again and
note the weights again and so on. After 4 readings you can estimate
which position requires the smallest weights. Fit those weights, mount
the wheel on the car and do the static balancing, and don't show your
face their again for the next few years because the guys there will hate
your guts....
Jack Aeckerlin, The Netherlands
1964 BJ8 29432
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