Thanks a lot for the feedback. It reinforces many of the points I noticed in the video which I'm hoping to improve on. That said, the Suzuka part was made out of 3 different replays from different races which is why there were a couple sudden shifts.
As far as the speed, I try to enter the first turn on Suzuka at 95 mph and I tend to start the drift about a second before I get to the turn. One thing I've noticed from drifting the Z34 is that during the drift it has decent grip as far as drift cars go, however when you enter the corner it takes much more precision as well as speed control and the proper angle in order to get it to drift through properly. Mostly it's because it tends to slide towards the out side of the corner if you don't start early enough.
I've noticed a similar response with the Viper ACR '08 in that with my setup it has the potential to achieve very nice drifts, but at the same time it lacks grip when initiating the drift.
On that note, if anyone knows of any good Viper ACR '08 drift setups please let me know. I've been working on my own setup as I plan on using the Viper for my next video, however it would be helpful to have a model of another setup.