uuuummmm last time I checked VVTi is Variable Valve Timing, not Varable Cam lobe possitioning.

I'm pretty sure I've read a few times, That VVTi meirly Shifts the Cam shafts into a different timing possition (ie advance the timing) so fuel is injected earlier in the revolution.

I mean the name says it all doesn't it... VVTi stands for Variable Valve Timing (intelgence? Injection? something along those lines) the key word there Timing not duration, not Lift.

But I'm only going on what I've read a few times on MCCR I'll try and find the link to the site that explains all the forms of change in Valve timing etc, I could be mistaking it for Vanos (BMW) or nissans version of VVT. But I will find out.