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FirestormFRS · 01-06-2013, 08:28 PM

Factory crank pulleys are not harmonic balancers. The rubber ring found in them is to quell vibration caused by the Vbelt.

There is no time in a modern factory to balance and engine to a specific crankshaft.

01-06-2013, 08:28 PM	#19
FirestormFRS Senior Member Join Date: Jul 2012 Drives: 2013 FR-S Location: Anytown Posts: 920 Thanks: 73 Thanked 643 Times in 302 Posts Mentioned: 3 Post(s)	Factory crank pulleys are not harmonic balancers. The rubber ring found in them is to quell vibration caused by the Vbelt. There is no time in a modern factory to balance and engine to a specific crankshaft.