The effects of WI will depend on how close you are to detonation otherwise.
Cooling the intake is not what WI does best. It will do it to a degree if there is no intercooler (so the air temps will be very high) but most of the real work is done inside the cylinders, once the compression has started.
That's when the water droplets will become steam and absorb lots of heat in the process.
If you want to bring charge temps down to ambient (or close to that) then best is to use an intercooler. WI takes over later.
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