xHoteKx

iTrader: (3)

ok, lets just say i get a VTEC controller to actually work on my car (2k2 EX coupe).. i could have it engage like at 2k rmps right? so then i'd kick in way faster than stock.. so i should be able to go faster.. true or false or am i just an complete idiot?

Grey

iTrader: (61)

True! VTEC is basically a selenoid that moves the cam shaft in and out to switch cam shaft profiles. It's activated at a certain rpm. If you program it to switch to the more aggresive profile sooner, then you will generate more power sooner. Although it's probably set up so that at higher rpm's it's very efficient and at lower rpm's it's not so efficient. Meaning that you won't gain all that much in the lower rpm's as you do in the higher rpm's.

HondaLuver

iTrader: (17)

This web site should explain every thing. http://www.honda-r.org.uk/html/vtec.htm

Grey

iTrader: (61)

Oh, I see... Whoops! I thought that it was a selenoid that moved the cam shaft. It's a hydraulic piston that locks all of the valve rocker arms together. That last valve rocker arm moves about the aggresive profile. Whoa! More complex than I thought. I wonder why they don't do it the way I described? You could technically have continuosly variable valve timing by making the bottom of the valve rocker arms tipped with a ballbearing in a socket and having the cam shaft shaped differently for each rpm. Then have a selenoid and a spring that holds the cam shaft in one position and the selenoid pulling it out of that position by having move current flow through it. Anyway... I've been saying that for a while. I'll adopt this new explanation.

xHoteKx

iTrader: (3)

im confused.. lol too much words to comprehend

Bartkat

I don't think the engine will run as well at lower RPM if it goes on the high cam too soon. Look at a car with a full race cam. It will barely idle and won't run well until it hits some high revs at full throttle.