vtec 好像不太一樣, vtec 是增加氣門時間... (不過我不懂, 歡迎大家來批.. )

How VTEC works
http://www.youtube.com/watch?v=q24D...feature=related
http://www.youtube.com/watch?v=stJM...feature=related
中文解說...
http://www.livemotor.com/modify/vtec.htm