Okay, okay. When I said there are better ways of lowering the charge temperature, I was still arguing the Intercooler versus water injection alone.
If you already have the biggest, most efficient intercooler there is, and you still need to cool it, use the water injection. Or use it from the start if you prefer. I just don't like it, water injection that is. I'm a stubborn old fart and that's just the way it is. Nyah!
As for even more efficiency, an air to water intercooler that runs iced saline would really chill the charge for a short period. Of course then you get into the same "consumable cooling system" argument as the water injection.
How about hooking the intercooler to the air conditioner's freon system? Would the power gains offset the loss of running the compressor? Just a thought.
Once again, water injection works very well, I just don't like it. Ignore me, listen to me, whatever, I'm easy.