[casioqv]

I love cooling system mods. Props for creativity, but I don't think there's any way you could keep a D24 cool using those as radiators... the flowrate won't be nearly high enough. This is why all car radiators use large end tanks with all of the tubes in parallel, vs the series type radiators you have there.

If you want significantly better cooling on a D24 consider a Volvo tropical fan clutch, and getting the radiator custom re-cored into a 3 row by a radiator shop. With this setup, my D24T stays under 100C running full throttle up a steep grade with the AC on! Or more cheaply, doing a "citric acid flush" to bring an old 2 core back into like-new condition, along with the tropical clutch. With the tropical clutch, you'll get better cooling than even an electric fan conversion.

Also, no radiator can keep the motor cool if you have a blown head gasket...