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Ford Small Block Stroker Engine Build Crankshaft Torsional Vibration

Shown below are the measured principle torsional vibrations of a 3-1/2-inch stroke crank. Curve No. 1 is what we see with a simple aluminum hub with no damping. Curve No. 2 is about the worst-case scenario for a new stock damper. In the good case, the peak could be down 30 percent on this. Curve No.3 is what we see with a well-sorted damper, although one specifically tuned to the system can do even better than this.
Ford Small-Block Stroker Engine Build - Stroker Strategies

 Shown below are the measured principle torsional vibrations of a 3-1/2-inch stroke crank. Curve No. 1 is what we see with a simple aluminum hub with no damping. Curve No. 2 is about the worst-case scenario for a new stock damper. In the good case, the peak could be down 30 percent on this. Curve No.3 is what we see with a well-sorted damper, although one specifically tuned to the system can do even better than this.  View Related Article

 

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