ZZ4 Crankshaft pulley size - Chevy Nova Forum
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Old 21st-June-2012, 04:45 PM   #1
MN72SS
 
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ZZ4 Crankshaft pulley size

Anyone know what size crankshaft pulley I should use. My old engine has a 6.5" aluminium pulley and my zz4 that I have installed has a 5.5". What are the advantages or disadvantages of either one? Should I take the 6.5" pulley off my old motor and go with that so all of my belts fit or should I stick with the 5.5" and get longer belts for it?
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Old 22nd-June-2012, 11:37 PM   #2
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Any thoughts?
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Old 23rd-June-2012, 01:03 AM   #3
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A ZZ4 does not come with Pulley, unless you get front drive.

Are you talking about the harmonic balancer?

Al
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Old 23rd-June-2012, 08:37 PM   #4
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It's the pulley that bolts onto the harmonic balancer. It is a two groove aluminum pulley that was on the used zz4 I installed. Being that it's 1" smaller will it be an issue that it turns my alternator, water pump, and power steering pump?
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Old 23rd-June-2012, 09:00 PM   #5
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Smaller the diameter the faster it turns.
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Old 23rd-June-2012, 09:07 PM   #6
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Quote:
Originally Posted by MN72SS View Post
It's the pulley that bolts onto the harmonic balancer. It is a two groove aluminum pulley that was on the used zz4 I installed. Being that it's 1" smaller will it be an issue that it turns my alternator, water pump, and power steering pump?
One inch smaller should still be OK unless any of the aforementioned accessories are already going bad. The smaller pulley will mean less rotations on your accessories.

John
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