Installed water/meth injection on the Talon on Saturday.
1 Gallon tank in the back of the car, I ran the line under the car with the fuel/brake lines, where it should be safe.
Mounted the pump to the battery box, about 10" from the injection point on the upper intercooler pipe.
It's switched via my eBoost2, rather than the normal Hobbs pressure switch. It'll give better control of the system, and it's part of the reason I went with the Turbosmart guage/controller in the first place.
I'll just be running straight water (distilled) on a 250cc injector to start with, but I may move up to 380cc's of 50/50 (which happens to be winter washer fluid, at 49% distilled water, 49% alcohol, and 2% dye) or even 780cc's of methyl hydrate to halt knock, supplement the fuel system (quite substantially, I'll add, given the stock 1800cc/min fuel setup), and enable moar boost!!.
I'm running 17 PSI right now, with a hint of knock when I get to 16-17 pounds...
20 PSI and meth, perhaps?