I did look at them, but there are some drawbacks (as with all the other options). I saw you have done the change though!
The problem I'm running into is first the majority of information I can find is only on Wikipedia, which is barely any info.
NZ Engine
The second problem is that I would want to use the F
XE engine, because of the higher compression. The problems though is
1) I think that means I need higher octane gas,
2) It's designed for a hybrid, so I don't think I could use it unless I took all the associated parts and
3) I don't believe it has VVT-i, so it's a trade-off and one I don't think I would want (again, very little info available and Wiki doesn't explicitly state that it is there).
The third issue is that the 1NZ-FE engine has an increase in compression, but only marginally (although in all fairness, I don't know what a .5CR increase would do to FE).
So... as with all the options, there is no single engine family that would be the holy grail that I'm searching for. If the FXE had VVT-i or even better Valvematic, then it would be for sure my number one option, but at that point, why don't I just buy a Prius C?!

(Of all the Prius options, that is the one I *recently decided* I would buy

)... never thought I would say that!
