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Old 09-24-2019, 06:19 PM   #1
zedjr10
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Does crankshaft pulley reduce vibrations much? Are aftermarket ones better?

I have been reading about different pulley systems and wondering how much ours limits crankshaft vibrations. Some have balancers in them and thick rubber. I am assuming ours have thick rubber but nothing else. Why do they call it harmonic balancer when it is really a crank pulley it seems?

Is the newer aftermarket pulleys better than the oem one? I know rare case right but have read that the materials in these things have gotten much better.
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Old 09-24-2019, 07:00 PM   #2
sonikaccord
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The OEM limits it within the original design parameters of the engine which is data only the Honda engineers and third-party testers have.

It's a harmonic damper because it cancels out crank harmonics. Harmonics are very small twisting forces applied across the crankshaft. Excess harmonics cause all sorts of issues with the most severe being a broken crank or block.

I'm pretty sure a modern pulley is the same or slightly better than the OEM. It won't matter much on a street driven engine anyway.
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Old 09-25-2019, 06:51 AM   #3
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http://www.laskeyracing.com/shop/harmonics.htm

https://www.enginelabs.com/engine-te...damper-advice/
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Old 09-25-2019, 12:23 PM   #4
zedjr10
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good info man. Thanks.
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