lexus114

In your opinion`s, which engine do you believe is a better motor. The VVT-i or the non VVT-i, And why? (other than the fact that the VVT-i is an interference engine)

UNOHOO

iTrader: (3)

i dont know enough about it to be able to offer any input but i was curious to know what vvt-i stood for if anything and what it actually is in terms of what it does for/to the motor

lexus114

variable valve timing,supposed to give you more power under all load conditions. The only downside of this version (that I know of) is it`s an interference engine,where as the non VVT-i is not. In simple terms,if the timing belt breaks on your Lexus (via the VVT-i) lets just say,your gonna stop dead in your tracks,and your not going ANYWHERE. , Oh,I forgot to mention that you will have ruined a very expensive motor,if this should happen.

UNOHOO

iTrader: (3)

so would it be fair or semi-accurate in laymans terms to say that the variable valve timing allows a computer to control precise points in the rotation of the crankshaft for the cylinders to fire applying force at specific moments during that rotation of the crankshaft? orrrrrrrr is that just retarded?

sktn77a

iTrader: (2)

Well, it allows small changes to be made to the valve timing (as opposed to just spark timing) to optimise this for engine speed, among other things. BMW call it VANOS, Honda call it VVT-i, other car companies call it other things (or just "variable valve timing").