VTEC?
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I understand how it works, but I have a tough time explaining it. I don't want to sound like everyone else on this forum, but try searching for "How VTEC Works" in either this form or the general S2000 talk forum, I'm sure someone has posted this before. You also might try Howstuffworks.com, although I have read better explanations then the one on that website, but it should give you a pretty good idea.
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I found a better website then howstuffworks.com, try the link below for a better read, and check the links out on the upper left corner of that site for more info.
http://www.leecao.com/honda/vtec/dohcvtec.html
http://www.leecao.com/honda/vtec/dohcvtec.html
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From: Purple sky
Vtec is basically something Honda had created and copyrighted (the name) back in late 80's. But nowadays, you will find some form of Vtec in most cars, foreign and domestic alike, though with different names; such as VVTI for Toyota, something for BMW, etc. But you get the idea. 
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I read some of the links but I'm sort of confused with the intake of fuel and air. The lobes are different heights allowing for more air and fuel to be taken in. But if an engine is working so fast, how can you allow air and fuel be taken for a longer amount of time when the piston is moving fast.
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Originally Posted by steve c,Aug 26 2005, 11:03 PM
0 years 0 days. Troll?
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From: Doh!!
Originally Posted by Purple_sky,Aug 26 2005, 09:24 PM
Vtec is basically something Honda had created and copyrighted (the name) back in late 80's. But nowadays, you will find some form of Vtec in most cars, foreign and domestic alike, though with different names; such as VVTI for Toyota, something for BMW, etc. But you get the idea.
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From: Vienna, VA
Originally Posted by Purple_sky,Aug 26 2005, 09:24 PM
Vtec is basically something Honda had created and copyrighted (the name) back in late 80's. But nowadays, you will find some form of Vtec in most cars, foreign and domestic alike, though with different names; such as VVTI for Toyota, something for BMW, etc. But you get the idea.
VVTLi (NOT VVTi) for toyota; only in the celica GTS
MIVEC (but not the Evo's) for Mitsu
Valvetronic for BMW
VANOS, VVTi, VVT, and non Evo MIVEC and the like are cam phasing implementations. They don't adjust valve lift, but only the valve timing.
Yes, VTEC changes timing because of the differing phases of the 2 lobes, but it is not continuously adjustable like other VVT systems. i-VTEC has added cam phasing to the traditional VTEC system, though.