There's not many ARZ's about, mate, I don't really know that much about them. Although, the next big difference between your ARZ & the AUM apart from the turbo, is the VVT. I'm sure it will make a bit of a difference, but how much of a difference, I'm not sure.
I would think with similar mods to mine, you should be able to hit 220 at least. (Although, as well as the AUM/Q's, you do have a smaller ported head compared to the
superior AGU lump!
