Crankshaft Development Race Engine Outside Diameter
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Most race crankshaft manufacturers prefer to balance with a smooth outside diameter. This means no holes drilled into the outside edge of the counterweights. Holes only increase windage. The solution is to turn the counterweights down to a minimum diameter and then add slugs of heavy metal to bring the crank into balance. In this photo, you can see three slugs of heavy "mallory" metal in the far counterweight. View Related Article
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