If the entire kit is truly 50-state carb legal, then that's huge. They say 2005 G35 and 2006 350Z... that suggests that they did CARB testing on those specific year cars, so perhaps the kit is CARB legal on 2006 G35s yet. Silly CARB rules!

A few notes about the kit that I noticed:

1) They use an in-line fuel pump and rising rate FMU for fuel management. While this is great from an off-boost emissions standpoint (retains factory injector cycles times at idle and low load), this requires the use of excessive fuel pressures to flow the necessary fuel. Beware that you're running in excess of 100-150 psi.

2) You have to hack in to your ECU wiring for the timing controller / signal conditioner. It'd be nice if they had a plug-and-play harness for this... hacking never feels good.

 

Are your refering to the AAM fuel system? Would you consider the upgrade necessary if your under 400rwhp? I was going to put this item off for a bit depending on my dyno numbers.

 

the vortech uses an 8:1 ratio FMU. That is, it increase the fuel pressure 8 psi per every 1 psi of boost ( I believe). At 8 psi of boost, you are looking at increasing your fuel psi 64 psi. What is our base fuel pressure? about 40psi?

you are only at 100 psi at the very top of the rpm band, and today's injectors can take that kind of pressure. They have been using a similar setup on mustangs fro almost 20 years, and it works.

also, you can buy a harness so that you don't have to hack the factory wires.

 

It's a bit of a band-aid solution. You get a linear increase in pressure with boost, and a linear increase in airflow (approximately) with boost, but fuel flow increases with the square root of pressure, so you get nonlinear effects where you're too rich or too lean in certain areas with limited control. But better safe than sorry.

 

no doubt there are better (and more expensive) solutions to adding fuel in a forced induction method. I am just saying that it is simple, yet effective.

 

Agreed. It gets the job done. And I like the fact that you have forced fuel increases with pressure, limiting the ability of poor programming to blow something up.