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Old 02-11-2005, 07:27 AM   #1
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Default Can someone explain...

...exactly what an SG crank is, how it differs from a standard crank, and what the benefits or uses would be? What wouold require the use of an SG crank?


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Old 02-11-2005, 09:50 AM   #2
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As far as i know SG crank is a longer one and the abbreviation 'SG' just represents the size of the crank.. An SG type crank is used in almost all touring cars... as its a bit longer.....

The other threaded type is usually used in trucks etc...

I dont think it has anything to do with performace... correct me if i am wrong ppl......
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Old 02-11-2005, 02:33 PM   #3
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The SG crank is less likely to be unstable at higher RPM, The reason is the clutch & bell are attatched to the crank directly. On a threaded crank the clutch is attatched to a pilot shaft (long flywheel nut) being 2 peices give more chance of vibration etc.
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Old 02-11-2005, 05:45 PM   #4
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An SG shaft allows the use of a 2-speed clutch without having to use a pilot shaft/nut which, as previously stated, is not the best for several reasons. I do not believe the SG shaft makes more power but I do think most companies use an SG shaft in their best engines.
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