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Various cam spec questions...warning, long post : ) 140-160 1968

posted by  CyaLater on  Sun Jun 6 22:58 CST 2004
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"Rotating mass has a large impact on how quickly a motor can rev, obviously, while reciprocating mass is much less important. Rotating mass affects acceleration more than reciprocating mass (oversimplifying)."

I have always thought there was a very noticable difference between early & late B20's, so I think reciprocating mass is important. Late B20/B21 cranks tend to be more bent then early B20 cranks & B18 cranks hardly bend at all. That bending force has to equate to more drag don't you think?

Cheers,
Paul.





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