GM Bow Tie Vortec Small Block Engine - Blue Thunder 355
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Hank laid out the counterweights so the weight would be off the ends of the assembly and so it would not flex at high revs. He used a very small amount of heavy metal to retain balance, but only in the end counterweights, and in this way it was able to keep the oil-cutting surface of the counterweights absolutely smooth. Further, the shape of the counterweights and their placement is critical to gain horsepower. Hank employed a 1.8882-inch crankpin rod-bearing diameter (referred to as the Honda or Quad-4), the most popular size for Busch cars--and if you hurt it, you can easily go down to the 1.850-inch Nextel Cup size. View Related Article
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