Cam upgrades for 4AGZE

[NoHachi]

If you fit cams with lots of duration and as a result overlap, you'll need to rev the engine to those higher rpms for them to work reasonably. At daily driving revs, the boost will dump lots of fuel into the exhaust and murder fuel consumption. Imho best left for track only engines operating in those high rpm bands. Since you can't up compression on an FI engine safely, off boost performance will be even worse then an NA engine.

For FI, like stated above, you want modest duration, minimal overlap and BIG lift. I don't think anyone made those kinds of cams for the 4AGE. If you throw these kinds of cams into a NA 4AGE, they will be known as weak, high torque, good for daily drive cams. Throw them into a GZE...different story and situation altogether.

Given what you know about engines, I would first experiment with higher boost (pullies) and the needed adjustments (sparkplugs, ignition, ECU mapping, fuel delivery, etc, etc), before deciding on a set of cams. I'm sure that there are some custom cam companies that can make you something decent. You need to first walk before you jump. Doing things incrementally will also decrease the chance for untraceable errors (and you'll have lots of those once you start messing with forced induction).