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Big block balancer question

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Old Sep 3, 2012 | 09:54 PM
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Default Big block balancer question

Is there any advantage or disadvantage to using a stock 7 inch harmonic balancer rather than an 8 incher on a Chevy big block high performance engine. I'm referring to factory balancers.............no aftermarket stuff. I know all high perf engines came with 8 inch balancers.

Last edited by Dr L-88; Sep 3, 2012 at 09:57 PM.
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Old Sep 4, 2012 | 01:09 AM
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Originally Posted by Dr L-88
Is there any advantage or disadvantage to using a stock 7 inch harmonic balancer rather than an 8 incher on a Chevy big block high performance engine. I'm referring to factory balancers.............no aftermarket stuff. I know all high perf engines came with 8 inch balancers.
A 7" balancer has less rotational mass so the engine will rev more quickly. An 8" balancer has more mass which gives it greater ability to absorb tortional vibrations. That's about it.
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