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Old 03-16-2007, 08:26 AM   #9
LSxcellent
 
Drives: MINI Cooper S
Join Date: Jan 2007
Location: Boston, MA
Posts: 284
Check this out:

<http://en.wikipedia.org/wiki/Variable_Valve_Timing>

This one has a nice animation:

<http://auto.howstuffworks.com/camshaft.htm>

This page has the animation for a pushrod engine:

<http://auto.howstuffworks.com/camshaft1.htm>

~LSx
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