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Does a lighter flywheel affect internal engine balance?

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Old Aug 17, 2004 | 12:16 PM
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From: lancaster pennsylvania
Does a lighter flywheel affect internal engine balance?
I don't see how it would, but I thought I'd check any way. Does it?

thanks
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Old Aug 17, 2004 | 12:21 PM
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Short answer "No," but it does change the rotating weight of the counterweight, which is why you need a new counterweight for a lighter flywheel. Think about it, it will make sense someday.
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Old Aug 17, 2004 | 12:25 PM
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From: lancaster pennsylvania
So I can't run a lighter flywheel without getting a lighter counter wheigt? I didn't think I would have to replace that too. What size would I need to run a 14 lb flywheel?
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Old Aug 17, 2004 | 12:33 PM
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They usually come with a counterweight. If not, its usually one from an automatic model.
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Old Aug 17, 2004 | 12:45 PM
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Originally Posted by neofreak
They usually come with a counterweight. If not, its usually one from an automatic model.
Most that I've seen do not include the counter weight. And yes, if they do not, you need to find a counterwieght from an automatic rx-7 with the same engine internals.
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Old Aug 17, 2004 | 01:05 PM
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Everyone I've purchased had one, RE Amemiya, Mazdaspeed...
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Old Aug 17, 2004 | 01:06 PM
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If you get the proper counterweight it doesnot affect the ballance at all. It reduces rotating mass but not the ballance.
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Old Aug 17, 2004 | 01:52 PM
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From: lancaster pennsylvania
Yeah, I double checked and the flywheel I ordered comes with a counter wheight. Thanks for all the input
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Old Aug 17, 2004 | 02:08 PM
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hmm, cool- so the flywheels are oviously engine-internal dependant than?
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