also...for those who are about to say single core radiators work just fine...

yes, a single core radiator will work just fine, but several people made this point to me when i was going to just stick with the single core.

honda engineers design b-series vtec's to run a certain temperature. and, with both a single core and dual core radiator if the thermostat is working well there shouldn't be any problems under normal driving conditions. however, on hot days where there is increased heat and stress on the engine the water temperature could very well rise 10-20 degrees because the single core radiator simply can't cool fast enough...because its capacity just isn't big enough. and yes, there are ways to get around buying a new radiator...which you seem to be doing by running your fan at all times. however, your fan is still not going to be as efficient as a bigger radiator with more capacity.

and the problems that occur may not be obvious at first, because the difference on your temp guage will probably be small...however, after prolonged use..ie two to three years of hard driving you increase your chances of something going wrong.

it would just suck if you blew your engine because you ran it hot...its happened to me and it sucks.