Fuel injection

Disclaimer: I work for an EFI seller that markets a different system, so I am not exactly an unbiased source.

I've seen the Powerjection III at PRI and talked with the developer. I've also heard feedback from people who have used earlier devices from the same company. From a packaging standpoint, it's quite impressive, and the wiring is very simple unless you want ignition control. Computer controlled ignition can give you pretty good gains in power and drivability if you get it dialed in on a good dyno, but can be a pain if you aren't planning on dyno tuning it. (There's no self learning ability for spark maps.) My experience with TBI type systems has been that the fuel distribution is about on a par with a carb.

From what I've heard from people who have used the self-learning feature, it seems to work best with mild cams and small exhausts, but luckily, it doesn't lock you out of hand tuning (unlike at least two other "easy" system I know of, and locking you out of that can turn the system into the EFI equivalent of a carb with the metering holes drilled into the body instead of on removable jets).

I'd say it is overall a decent entry-level EFI system, with its target audience being someone who wants a straightforward street car without too much hassle, and doesn't need the ECU to be loaded with features.