^^ Agreed.
In the Evo world, we usually run methanol to allow us to push 30+ psi on pump gas, and still be able to make power. I starting running methanol on my V6 turbo so I could push almost 25 psi on a GT35R. Unless you think you're going to be pushing that kind of specific output and/or boost, then it's probably not worth it. The 370Z really doesn't need a lot of boost (and in turn extra heat) to reach insane power levels.
__________________
'10 PW 370Z 7AT - wife's car - Project Raspberry Cheesecake
'08 Evo X - built motor+trans | BB-X @ 32 psi | CH3OH | self-built+tuned - ??? WHP
'01 Galant V6 - built motor | GT35R | self-built+tuned - 550+ WHP (retired) |