The best place to look would be on 300zx discussion boards. Or shearch google for "turbo VG33" but leave off "Xterra"

Probably around here you will just get a bunch of smart ass answers because there is a belief that by wanting a quicker, better handling Xterra is counter to its purpose. I dont really understand how having a slow shopping cart makes you cool, but thats what people believe.

I wouldnt do that personally. The X is quick enough for me, but that would be pretty cool if you got it to work. My friend turbo charged his jeep about a year ago- definately made it unique.

You can also bore it out and install Q45 pistons, which would make it a 3.4 liter with higher compression. Wouldnt give you as much as a good turbo, but Im just pointing out that there are quite a few things you can do to the engine. All they require is time, money and guts.