Originally Posted by PNW_Steve
I have never fooled with an air to water intercooler.
I have to wonder what the temperature of the air coming out of the turbo that you can cool it with 180F coolant?
That said, the cooler the air the more dense it is and the more power you can make.
They actually work pretty well.
Most systems I've seen were self contained and have their own pump/radiator.
The few that did draw from the engine radiator worked good, as long as your coolant temp isn't ran ragged. Typically, the water at the bottom of the radiator is substantially cooler then that at the thermostat outlet.
And with water having way more heat carrying capacity then air, they work better then most air to air intercoolers, and have a smaller footprint.
Running without an intercooler, you can see inlet air temps close to 300-400 degrees F depending on how much boost psi you're running.
If you plan on making any power at all turbocharged, an intercooler is almost a must. Having your air filter draw from outside air is also a big help.