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| Moderated by: Greg Fletcher |
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| Flywheels | Rate Topic |
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| Posted: 10-06-2009 07:52 am |
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1st Post |
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subwoofer Member
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Can the later Lotus flywheels be used with the JH clutch, or do I have to use the JH flywheel as well? My Spec5 engine will be arriving today, just mentally preparing myself for the task ahead. The later Lotus flywheels are lighter, or am I mistaken? -- Joachim
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| Posted: 11-06-2009 12:23 am |
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2nd Post |
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Greg Fletcher Administrator 
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Later Lotus flywheels do fit, although no idea up to how far that goes. They look about the same, I doubt they are much lighter. The biggest advantage is that they have a shoulder to keep the ring gear in place. On the JH, the ring gear just sits there and gets pushed back by the starter over the years to the point that it will eventually not engage and need to be repositioned. Complete failure on the design on that one. When I rebuild an engine, I take the flywheel to a machine shop and have them spot weld it all around and get it balanced.
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| Posted: 05-18-2016 02:29 pm |
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3rd Post |
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gmgiltd Member
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I have a question regarding flywheels which I hope someone can help me with - my understanding is that early 907s were fitted with cast iron flywheels that were safe to 7400 rpm and later engines went with cast steel which in lightened and balanced form were safe to at least 8800rpm. The club store sells lightened 'steel' flywheels but they are exchange. Can anyone tell me at what point in production the flywheel material changed?
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