Good Question. i would love to know also....my old diablo didnt have it and the SV has it.....

can any one shed some light?? :wave:

 

Variable Valve Timing is a setup that allows the altering of the opening and closing valve times throughout the rev range. It is typically achieved mechanically by rotating the cam ahead a little as it spins so as to advance the timing at higher revs.

Some cars actually shift the cam sideways as the revs increase to present a different shape of cam lobe to the valve ie it becomes more than a basic timing shift but a new timing all together.

The VVT goal is to dynamically tune the engine based on revs and that leads to more power.

There are a number of settings set during a valve adjustment and all are applicable to a VVT engine. One could argue that some aspects of the value adjustments are even more critical in a VVT engine as timing "errors" would be amplified throughout the rev range.

-mick

 

Thanks for the description

 

cool thanx.. so that is what makes the extra HP over the older model

 

Not just extra power, but VVT can change the shape of the horsepower and torque curves. That is it's primary use - to broaden the torque curve of a motor. In a lot of cases this can also lead to better fuel efficiency, but if that's a priority, you don't want to be in a Diablo...