How Do Higher Ratio Rockers Work?
#1
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First of all, what do higher ratio rocker arms do? Secondly, why did GM stop at the roller pivot without adding the roller tip?
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#2
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1. Leverage. The distance from the pivot to the tip is longer, so the valves open farther, just not for more duration. You need a cam to change duration, but the cam can change lift as well, like rockers.
2. Cost.
2. Cost.
#3
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Originally Posted by MACDRIVE
Secondly, why did GM stop at the roller pivot without adding the roller tip? ![Very Happy](https://www.gmforum.com/gm/images/smilies/biggrin.gif)
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