Thanks for the replies, I think you are correct in that the VVT system on George is the 'i' system - inlet only - although I'm basing this on looking at an exploded view of the engine and trying to spot the parts involved and of course I am an expert engineer
What I'm wondering though is what affect the inlet VVT system has on whether the engine is running its best at WOT vs part throttle. One thing that has surprised me about George is that he can pull from low revs - anything over 1000 rpm on the flat, and anything over 1500 on a hill. There is a "shift" in the power delivery around 3-4000 rpm - not sure exactly where.
I'm experimenting with P&G (engine on) but I'm not sure what rev range to use. Its the old BSFC search...