Regular GM Harmonic Balancer or underdrive?

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07-04-2017, 09:00 PM

DDP

Burning Brakes

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Regular GM Harmonic Balancer or underdrive?

I'm changing the wobbly crankshaft harmonic balancer and pulley and was contemplating putting on an underdrive pulley. Is there a benefit?

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07-04-2017, 09:21 PM

Speed07

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An under drive pulley will cause your accessories to spin slower. No advantage for a street driven car. The consensus on the forum is to avoid the stock GM pulley and go aftermarket, ATI, Powerbond, etc.

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