vvt on 20v silver top

[andy]

Hey guys, i need to know how the vvt works on the silver 20v.

i have a feeling it comes on depending on throttle depression.
can anybody confirm this or explain how is this isnt true?

[Billzilla]

http://www.billzilla.org/4agstock.htm
and
http://www.billzilla.org/vvtvtec.htm