Having come from a similar car 480bhp supra
In all honesty the 350z (thats with TC off) is well behaved compared to the Supra... Supra was in constant argument about which end of the car wanted to be infront of the other! The Supra in the wet was just something else........ its like a psychopath in the bushes, just waiting for the right moment to jump out and kill you!
Sorry Graham, have to disagree on that one, in comparison to what your describing mine was very well behaved and dint often brake away without provocation even at 540BHP and nearly as much torque, i drove it hard in all kinds of weather too.... mind you i can remember a lot of posts on the Supra forum about Supras stepping out all over the place, but it was usually down to bad alignment and/or tyres.
540 = single right? I was running hybrid twins, so maybe that made a difference. I had new tyres and the alignment was done. Was wet/damp on the days the above happened.... didnt have any good summers during my ownership of the car. It was the final nail in the coffin for the car... driving home one evening after a long day at work, with NO provocation the back decided it was time for the passing move!! All I wanted to do was drive home nice and calmly, but the car had other opinions and that was when I decided to sell.