Twin Turbo Ls3

[exwestracer]

If you want the same amount of temp differential, you need the same amount of heat exchange. If you're doing water/air with a radiator, the water is just a transfer medium; it does NOT improve the cooling efficiency of the overall system (compressor outlet temp vs. intercooler outlet temp). It can improve the packaging in the car, but a smaller radiator works the same way as it does with the engine...it won't remove as much heat.

Water/air with a chilled water reservoir is a whole different story...