For those curious, here's a water meth injection setup I did on the supercharged 4Runner. Picked up a TON of timing and was able to add an add'l 1.5 pounds of boost via smaller pulley. The TRD supercharger (aka Magnuson) I have on the 4Runner is NON intercooled, so this was a great upgrade. The 4Runner also can NOT be tuned directly, so you have to manipulate variables that then affect the factory tuning. Doing this caused the PCM to add about 7 or 8 degrees of timing and I'm now at 11psi of boost Easily 300RWHP and 300RWTQ and a very peppy ride.
Not sure I'd put this on a car with a proper tune and intercooler, but was a fun, and cheap, project. Good bang for the buck on this ride.
This is part 1. I'll post part 2 next weekend.