I know it stands for Variable Valve Timing with Electronic Lift Control but what does all of that mean?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EJ1Racing.tk &raquo;</TD></TR><TR><TD CLASS="quote">I know it stands for Variable Valve Timing with Electronic Lift Control but what does all of that mean? </TD></TR></TABLE>

At low speeds the cams run at a lower cam lobe profile. When you reach a certain RPM, oil pressure builds up and locks the "race cam" which extends the profile of cam.

 

http://www.HowStuffWorks.com - Search for VTEC. Lots of good diagrams and animations

 

variable valve timing and electronic control lift

 

oops sorry already knew

 

its really simple, Its a good idea because its economic

Variable Valve timing, which different manufactorers have, but use different combination of letters to define can be simply explained as this

if u know what a camshaft does, it should take no time to register, the cam open and closes the valves, How long it keeps them open is called duration measured in degrees, and how high or far is called lift. measured in mm....

to make big horsepower, u need a good combination of both, but u are going to sacrifice low end power.....you will decrease gas milage and get a loopey idle which most people dont really want from a stock car

so to make it the best of both worlds, Car manufactorers created Variable valve timing...The cam shaft has two different size lobes to open one set of valves, Usually in the order of "Small lobe Big lobe small lobe" when driving around normally the small lobes open and close the valves for economical reasons, when u get the itchy right foot to floor the pedal, if the conditions are right, (car at operating temp, oil pressure ect ect) the car will use oil pressure to engage or activate the bigger cam shaft which will increase the amount of air going into the engine there for more power

thats as simple as i can put it

 

put in short, its keeps the car fuel efficent at lower rpm and when vtec kick in it "kinda" like having a race cam

it's all about cam timing