[dbo1]

From what I've read, it's just that...a faster way to do what the ECU will eventually do on it's own. The ECU will gather external data for some period of time, and adjust the A/F ratio/timing accordingly. This is why many people believe that N/A bolt-ons won't do much in the long run. The ECU will compensate and retard the timing.

I've been a member at my350z for more than a year and read dozens of posts on these exact same issues/problems. It's kinda funny, I'm planning on selling my Z to get a Titan and looks like I'll be running into the same barriers.