Quote:
Originally Posted by GreenSnakeDoc
Thanks for the suggestions guys. I'd like to know exactly what 28 oz. imbalance means. An extra weight located towards the O.D. has more effect on balance than the same weight in the middle. Maybe the automotive engineers have an 'understanding" on this and use the terms "28 oz." and "50 oz." to simplify the nomenclature. From doing a little work with gears, I've learned about a term called "diametral pitch". It's basically the spacing between adjacent gear teeth. Whenever two gears mesh, they must have the same diametral pitch so each tooth on one goes into the gap between teeth of the other. A designer can take the diametral pitch number and the number of teeth he needs on each gear for the reduction ratio to get the pitch diameter of each gear and the center spacing.  |
28oz or 50oz imbalance should be correctly stated as 28 oz/inch.
The 28oz/50oz is actually the weight that would be placed on a 1" radius from the centerline of the crank main bearing journals if that was physically possible.
As its not a smaller actual weight of metal is placed at a larger distance from the centerline- from memory I think it goes : 28oz[/i] @ 1" radius, 14oz @ 2" radius, 7oz @ 4" radius, 3.5oz @ 8" radius etc.
50 @ 1", 25 @2", 12.5@4", 6.25@8" etc,
Im sure some genius will correct me if wrong, but thats how I understand it.
""" Not sure I ' Learnt ' anything from the correolius example above though
Jac Mac