MTFCA Forum

Thank you all for your great input on my original post! However, based on the advice given, am I to understand that this counterweighted crank cannot be successfully balanced statically? If so, why?

At least you pick the heavier one to weld the weights on to, I had an engine that came in with the Dunn's weight on it, had a bad vibration to it, sent it out for dynamic balancing, fired it back up and it still had it, removed the weights and rebalanced and it was gone???? I do not know if to much weight or in the wrong location? These where the after market ones not the originals? Just telling what I had found out years ago on one.

Joe
I installed a set of the new Dunn weights more than 40 years ago on my 27 roadster. I labored over the installation to avoid any bending stress in the crank. I’ve been totally happy with it ever since. I think the fitting is the key

Thanks Scott- I believe I understand now.

Just got my balanced rotating engine assembly back from the machine shop.
The stock crank was previously balanced by itself.
The magnets were weighed and placed to best statically balance (offsetting weights).
It came back with five drilled 3/8 drilled holes. The deepest was about 1/2 inch.
Three were adjacent to each other but one was about 30 degrees over.
Harry

Tim, This was easier for me to understand. http://www.antiqueautoranch.com/montana ... page4.html