wait....you ran it WITHOUT a radiator?? lol, please
read the watercooling section of PC's cooling tech explained article. the system requires a radiator.
now this has been brought up befor, but AIR in the system (waterblock or radiator specifically) will drastically reduce the systems ability to cool. any air in the radiator (since you said you removed it from the system already) is bad, so PLEASE make sure you bleed the system of air. grab the radiator and move it around, shake it, whatever so theres absolutley no air in there. or you can set the system on its side while its running and that should help (just make sure your res is watertight, or else hold it so its upright when the system is on its side).
also, how are you measuring the temps??? are you using a separate probe, or the in-socket thermistor, or...?
also, take all idle and full-load temps from within windows, not the BIOS.
speaking of full-load temps, what are they?? have you tested for that yet?