I'm not saying you can't get 2 oz per plant, but I really really wouldn't count on it.
I ran a SOG for over 10 years, and my highest yields were a little over 30g dried per plant. In my 4x4 flood tray I would fit 45 plants that size which is over 3lbs under 1k hps. I was very happy with those results, the buds were huge.
If you manage to double that it would be awesome, and more power to you. I'm just telling you I've never seen it done that I can remember. You might veg longer or train them differently then I did. Both can produce bigger plants and more yield per plant, but you also have to make sure you don't overcrowd the tent because that will reduce yields even with bigger plants. Also, more veg time means less harvests per year in a perpetual grow.