correct me if im wrong, but arent some of them (drifters using 4a's in sprinters) running twin side drafts?
and im told (i havent tried it so i dont know) that if you put twin carbies on a 4age 16v it pulls as hard as a 20v?
I say learn to drift with high power (200kw) when it's easy, then when you get good go N/A and get better with less power, when you know how to get the car setup for corners etc etc..