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  How Fiat MultiAir Technology Works - YouTube

  https://www.youtube.com/watch?v=Td9Gz_h7Qpg

  http://fiat500usa.com/ The US Fiat 500 and Fiat 500 Abarth uses MultiAir valvetrain technology. This innovative design is best described as "variable valve t...

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  Overhead Cam at 14K RPM - YouTube

  https://www.youtube.com/watch?v=nsa6kq-qqIE&feature=player_embedded

  This video shows an operational cutaway of a BMW S1000RR — a 193HP superbike — bumping against its 14,200RPM redline. A cam and valvetrain at 118 cycles per ...

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